Today's Message Index:
----------------------
1. 12:45 AM - Re: Engine won't rotate by hand a full 360 degrees (Philip A. C.)
2. 04:42 AM - Re: Engine won't rotate by hand a full 360 degrees (Archie)
3. 05:58 AM - Re: Engine won't rotate by hand a full 360 degrees (Jim Stone)
4. 06:28 AM - Re: Engine won't rotate by hand a full 360 degrees (Jim Stone)
5. 06:48 AM - Re: Re: Engine won't rotate by hand a full 360 degrees ()
6. 07:22 AM - Re: Engine won't rotate by hand a full 360 degrees (jrc)
7. 08:57 AM - Re: Engine won't rotate by hand a full 360 degrees (Jim Stone)
8. 09:15 AM - Re: Engine won't rotate by hand a full 360 degrees (steve korney)
9. 10:08 AM - Fw: Engine won't rotate by hand a full 360 degrees (Jim Stone)
10. 10:27 AM - Re: Engine won't rotate by hand a full 360 degrees (Archie)
11. 12:10 PM - Re: Engine won't rotate by hand a full 360 degrees (Ken Johnson)
12. 12:55 PM - Re: Engine won't rotate by hand a full 360 degrees (Archie)
13. 08:52 PM - Re: Engines-List Digest: 4 Msgs - 12/20/05 (TBelvin38@aol.com)
14. 09:01 PM - Re: Engine won't rotate by hand a full 360 degrees (Jim Stone)
15. 09:14 PM - Re: Re: Engines-List Digest: 4 Msgs - 12/20/05 (Jim Stone)
Message 1
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| Subject: | Engine won't rotate by hand a full 360 degrees |
--> Engines-List message posted by: "Philip A. C." <philipac@suncraftgroup.com>
Jim,
How is the feel of the "hang"? Solid with a Clonk, solid but not so Clonky -
rather giving for a few thousandth before to stop, or mushy?
Was the engine rotated before, when fresh from overhaul?
There is another type of FO possible: many mechanics use pieces of split
rubber hose to hold the conrods upright when joining the two half-cases.
Forget to remove one (unlikely, but can still happen...), and it can get
stuck between the crankshaft anf the cylinder's skirt. It may even allow the
engine to be rotated a few times before to wedge itself.
Internal corrosion can also do... pray not! A stuck valve can do too, and
this can be a result of corrosion on the stem.
Was the engine "pickled"?
The "feel" helps a lot in determining what's wrong, and unfortunately this
can't be sent through e-mail...
Rotate slowly, listen attentively, feel through your fingers. Remove the
valve covers and check the pushrods. See if the blockage happens when one
particular rocker starts pushing on one valve.
Regards
Philip
-----Original Message-----
From: owner-engines-list-server@matronics.com
[mailto:owner-engines-list-server@matronics.com]On Behalf Of Jim Stone
Subject: Re: Engines-List: Engine won't rotate by hand a full 360
degrees
--> Engines-List message posted by: "Jim Stone" <jrstone@insightbb.com>
Thanks Archie, I was hoping you would give me you opinion.
Not sure about the rings. Probably Lycoming but not sure.
The cylinders are new. I ordered new jugs from Lycoming and had Performance
Aero flow balance and install 10 to 1 forged pistons. The engine was
overhauled 3 years ago and has been at constant temp and humidity since (in
my basement workshop).
Hope this additional info helps,
Jim
----- Original Message -----
From: "Archie" <archie97@earthlink.net>
Subject: Re: Engines-List: Engine won't rotate by hand a full 360 degrees
> --> Engines-List message posted by: "Archie" <archie97@earthlink.net>
>
> Excessive choke and tight ring gaps will do it.
> If you are using standard aircraft rings, should not be a problem, though
> you can normally drive a truck through the gaps.
> Are the cylinders oversize? Were they bored correctly?
> Archie
> Archie's Racing Service
> ----- Original Message -----
> From: "Jim Stone" <jrstone@insightbb.com>
> To: <engines-list@matronics.com>
> Subject: Engines-List: Engine won't rotate by hand a full 360 degrees
>
>
>> --> Engines-List message posted by: "Jim Stone" <jrstone@insightbb.com>
>>
>> I have a 0 time overhauled Lyc 540 and while attempting to set the mag.
>> I was rotating the engine with the starter ring or flywheel (prop not
>> installed) and noticed the engine would stop at one point while rotating
>> clockwise (60degrees btdc) and at a slightly different place when
>> rotating
>> counterclockwise(40 degrees btdc).
>> At both hang points, no piston was approaching TDC (indicating no FOD in
>> cylinder). I removed the mag but no improvement.
>> Anyone have any ideas on what might cause this and what I need to do to
>> correct it?
>> Thanks,
>> Jim
>>
>>
>>
>
>
Message 2
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| Subject: | Re: Engine won't rotate by hand a full 360 degrees |
--> Engines-List message posted by: "Archie" <archie97@earthlink.net>
Is it every revolution, or every other? (360/720)
This may narrow it down a bit.
----- Original Message -----
From: "Jim Stone" <jrstone@insightbb.com>
Subject: Re: Engines-List: Engine won't rotate by hand a full 360 degrees
> --> Engines-List message posted by: "Jim Stone" <jrstone@insightbb.com>
>
> Thanks Archie, I was hoping you would give me you opinion.
> Not sure about the rings. Probably Lycoming but not sure.
> The cylinders are new. I ordered new jugs from Lycoming and had
> Performance
> Aero flow balance and install 10 to 1 forged pistons. The engine was
> overhauled 3 years ago and has been at constant temp and humidity since
> (in
> my basement workshop).
> Hope this additional info helps,
> Jim
>
> ----- Original Message -----
> From: "Archie" <archie97@earthlink.net>
> To: <engines-list@matronics.com>
> Subject: Re: Engines-List: Engine won't rotate by hand a full 360 degrees
>
>
>> --> Engines-List message posted by: "Archie" <archie97@earthlink.net>
>>
>> Excessive choke and tight ring gaps will do it.
>> If you are using standard aircraft rings, should not be a problem, though
>> you can normally drive a truck through the gaps.
>> Are the cylinders oversize? Were they bored correctly?
>> Archie
>> Archie's Racing Service
>> ----- Original Message -----
>> From: "Jim Stone" <jrstone@insightbb.com>
>> To: <engines-list@matronics.com>
>> Subject: Engines-List: Engine won't rotate by hand a full 360 degrees
>>
>>
>>> --> Engines-List message posted by: "Jim Stone" <jrstone@insightbb.com>
>>>
>>> I have a 0 time overhauled Lyc 540 and while attempting to set the mag.
>>> I was rotating the engine with the starter ring or flywheel (prop not
>>> installed) and noticed the engine would stop at one point while rotating
>>> clockwise (60degrees btdc) and at a slightly different place when
>>> rotating
>>> counterclockwise(40 degrees btdc).
>>> At both hang points, no piston was approaching TDC (indicating no FOD in
>>> cylinder). I removed the mag but no improvement.
>>> Anyone have any ideas on what might cause this and what I need to do to
>>> correct it?
>>> Thanks,
>>> Jim
>>>
>>>
>>>
>>
>>
>>
>
>
>
Message 3
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| Subject: | Re: Engine won't rotate by hand a full 360 degrees |
--> Engines-List message posted by: "Jim Stone" <jrstone@insightbb.com>
Every revolution. You see, it locks up in one direction so I reverse the
rotation and it locks up at a slightly different location (one or two inches
of teeth on ring gear short of previous locked up point). I cannot get a
full revolution out of it.
Thanks,
Jim
----- Original Message -----
From: "Archie" <archie97@earthlink.net>
Subject: Re: Engines-List: Engine won't rotate by hand a full 360 degrees
> --> Engines-List message posted by: "Archie" <archie97@earthlink.net>
>
> Is it every revolution, or every other? (360/720)
> This may narrow it down a bit.
>
>
> ----- Original Message -----
> From: "Jim Stone" <jrstone@insightbb.com>
> To: <engines-list@matronics.com>
> Subject: Re: Engines-List: Engine won't rotate by hand a full 360 degrees
>
>
>> --> Engines-List message posted by: "Jim Stone" <jrstone@insightbb.com>
>>
>> Thanks Archie, I was hoping you would give me you opinion.
>> Not sure about the rings. Probably Lycoming but not sure.
>> The cylinders are new. I ordered new jugs from Lycoming and had
>> Performance
>> Aero flow balance and install 10 to 1 forged pistons. The engine was
>> overhauled 3 years ago and has been at constant temp and humidity since
>> (in
>> my basement workshop).
>> Hope this additional info helps,
>> Jim
>>
>> ----- Original Message -----
>> From: "Archie" <archie97@earthlink.net>
>> To: <engines-list@matronics.com>
>> Subject: Re: Engines-List: Engine won't rotate by hand a full 360 degrees
>>
>>
>>> --> Engines-List message posted by: "Archie" <archie97@earthlink.net>
>>>
>>> Excessive choke and tight ring gaps will do it.
>>> If you are using standard aircraft rings, should not be a problem,
>>> though
>>> you can normally drive a truck through the gaps.
>>> Are the cylinders oversize? Were they bored correctly?
>>> Archie
>>> Archie's Racing Service
>>> ----- Original Message -----
>>> From: "Jim Stone" <jrstone@insightbb.com>
>>> To: <engines-list@matronics.com>
>>> Subject: Engines-List: Engine won't rotate by hand a full 360 degrees
>>>
>>>
>>>> --> Engines-List message posted by: "Jim Stone" <jrstone@insightbb.com>
>>>>
>>>> I have a 0 time overhauled Lyc 540 and while attempting to set the mag.
>>>> I was rotating the engine with the starter ring or flywheel (prop not
>>>> installed) and noticed the engine would stop at one point while
>>>> rotating
>>>> clockwise (60degrees btdc) and at a slightly different place when
>>>> rotating
>>>> counterclockwise(40 degrees btdc).
>>>> At both hang points, no piston was approaching TDC (indicating no FOD
>>>> in
>>>> cylinder). I removed the mag but no improvement.
>>>> Anyone have any ideas on what might cause this and what I need to do to
>>>> correct it?
>>>> Thanks,
>>>> Jim
>>>>
>>>>
>>>>
>>>
>>>
>>>
>>
>>
>>
>
>
>
Message 4
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| Subject: | Re: Engine won't rotate by hand a full 360 degrees |
--> Engines-List message posted by: "Jim Stone" <jrstone@insightbb.com>
Philip,
The hang is solid, firm not mushy and has sort of a clunk that can be felt
in the accessory section, which is why I removed the mag. I was present for
most of the overhaul and I had my mech disassemble the jugs to ensure they
were assembled correctly. Perhaps a mistake was made during reassembly.
The engine has always been very stiff and I don't recall every making a full
360.
The engine was not pickled, but as stated earlier, was oiled well during
assymbly and has been at 70 degrees year round with desicator plugs in each
of the upper plug holes. Moisture doesn't seem to be an issue. I'm not
sure how to check for the the pushrods but will remove the valve covers and
start trying to isolate the cause.
Thanks for your response,
Jim
> How is the feel of the "hang"? Solid with a Clonk, solid but not so
> Clonky -
> rather giving for a few thousandth before to stop, or mushy?
>
> Was the engine rotated before, when fresh from overhaul?
>
> There is another type of FO possible: many mechanics use pieces of split
> rubber hose to hold the conrods upright when joining the two half-cases.
> Forget to remove one (unlikely, but can still happen...), and it can get
> stuck between the crankshaft anf the cylinder's skirt. It may even allow
> the
> engine to be rotated a few times before to wedge itself.
>
> Internal corrosion can also do... pray not! A stuck valve can do too, and
> this can be a result of corrosion on the stem.
>
> Was the engine "pickled"?
>
> The "feel" helps a lot in determining what's wrong, and unfortunately this
> can't be sent through e-mail...
>
> Rotate slowly, listen attentively, feel through your fingers. Remove the
> valve covers and check the pushrods. See if the blockage happens when one
> particular rocker starts pushing on one valve.
>
> Regards
>
> Philip
>
> -----Original Message-----
> From: owner-engines-list-server@matronics.com
> [mailto:owner-engines-list-server@matronics.com]On Behalf Of Jim Stone
> To: engines-list@matronics.com
> Subject: Re: Engines-List: Engine won't rotate by hand a full 360
> degrees
>
>
> --> Engines-List message posted by: "Jim Stone" <jrstone@insightbb.com>
>
> Thanks Archie, I was hoping you would give me you opinion.
> Not sure about the rings. Probably Lycoming but not sure.
> The cylinders are new. I ordered new jugs from Lycoming and had
> Performance
> Aero flow balance and install 10 to 1 forged pistons. The engine was
> overhauled 3 years ago and has been at constant temp and humidity since
> (in
> my basement workshop).
> Hope this additional info helps,
> Jim
>
> ----- Original Message -----
> From: "Archie" <archie97@earthlink.net>
> To: <engines-list@matronics.com>
> Subject: Re: Engines-List: Engine won't rotate by hand a full 360 degrees
>
>
>> --> Engines-List message posted by: "Archie" <archie97@earthlink.net>
>>
>> Excessive choke and tight ring gaps will do it.
>> If you are using standard aircraft rings, should not be a problem, though
>> you can normally drive a truck through the gaps.
>> Are the cylinders oversize? Were they bored correctly?
>> Archie
>> Archie's Racing Service
>> ----- Original Message -----
>> From: "Jim Stone" <jrstone@insightbb.com>
>> To: <engines-list@matronics.com>
>> Subject: Engines-List: Engine won't rotate by hand a full 360 degrees
>>
>>
>>> --> Engines-List message posted by: "Jim Stone" <jrstone@insightbb.com>
>>>
>>> I have a 0 time overhauled Lyc 540 and while attempting to set the mag.
>>> I was rotating the engine with the starter ring or flywheel (prop not
>>> installed) and noticed the engine would stop at one point while rotating
>>> clockwise (60degrees btdc) and at a slightly different place when
>>> rotating
>>> counterclockwise(40 degrees btdc).
>>> At both hang points, no piston was approaching TDC (indicating no FOD in
>>> cylinder). I removed the mag but no improvement.
>>> Anyone have any ideas on what might cause this and what I need to do to
>>> correct it?
>>> Thanks,
>>> Jim
>>>
>>>
>>>
>>
>>
>
>
>
Message 5
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| Subject: | Re: Engine won't rotate by hand a full 360 degrees |
--> Engines-List message posted by: <harvey.rule@sympatico.ca>
>I had that happen to me once when I was working on a 1/2 vw;what had happened
was the gear for the distributor had fallen back in and was locking everything
up.Since I wasn't using the distributor;I was using mags;for some strnge reason
it went to a bad place.We had to dismantle the whole engine to get it out.Pain
in the ass stuff.
> From: "Jim Stone" <jrstone@insightbb.com>
> Date: 2005/12/21 Wed AM 08:54:24 EST
> To: <engines-list@matronics.com>
> Subject: Re: Engines-List: Engine won't rotate by hand a full 360 degrees
>
>
Message 6
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| Subject: | Re: Engine won't rotate by hand a full 360 degrees |
--> Engines-List message posted by: "jrc" <jrccea@bellsouth.net>
Were the top edges of the 10:1 pistons champhered to provide relief where
the heads meet the cylinders? I've heard that, at 10:1 there can be some
interference. Archie would know more about that.
JimC
----- Original Message -----
From: "Jim Stone" <jrstone@insightbb.com>
Subject: Re: Engines-List: Engine won't rotate by hand a full 360 degrees
> --> Engines-List message posted by: "Jim Stone" <jrstone@insightbb.com>
>
> Every revolution. You see, it locks up in one direction so I reverse the
> rotation and it locks up at a slightly different location (one or two
> inches
> of teeth on ring gear short of previous locked up point). I cannot get a
> full revolution out of it.
> Thanks,
> Jim
Message 7
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| Subject: | Re: Engine won't rotate by hand a full 360 degrees |
--> Engines-List message posted by: "Jim Stone" <jrstone@insightbb.com>
You got me there.
----- Original Message -----
From: "jrc" <jrccea@bellsouth.net>
Subject: Re: Engines-List: Engine won't rotate by hand a full 360 degrees
> --> Engines-List message posted by: "jrc" <jrccea@bellsouth.net>
>
> Were the top edges of the 10:1 pistons champhered to provide relief where
> the heads meet the cylinders? I've heard that, at 10:1 there can be some
> interference. Archie would know more about that.
> JimC
>
> ----- Original Message -----
> From: "Jim Stone" <jrstone@insightbb.com>
> To: <engines-list@matronics.com>
> Subject: Re: Engines-List: Engine won't rotate by hand a full 360 degrees
>
>
>> --> Engines-List message posted by: "Jim Stone" <jrstone@insightbb.com>
>>
>> Every revolution. You see, it locks up in one direction so I reverse the
>> rotation and it locks up at a slightly different location (one or two
>> inches
>> of teeth on ring gear short of previous locked up point). I cannot get a
>> full revolution out of it.
>> Thanks,
>> Jim
>
>
>
Message 8
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| Subject: | Re: Engine won't rotate by hand a full 360 degrees |
--> Engines-List message posted by: "steve korney" <s_korney@hotmail.com>
Jim...
Could be in the assesory case...Maybe even the oil pump...Or the fuel pump
push rod...
Best... Steve
----Original Message Follows----
From: "Jim Stone" <jrstone@insightbb.com>
Subject: Re: Engines-List: Engine won't rotate by hand a full 360 degrees
--> Engines-List message posted by: "Jim Stone" <jrstone@insightbb.com>
Philip,
The hang is solid, firm not mushy and has sort of a clunk that can be felt
in the accessory section, which is why I removed the mag. I was present for
most of the overhaul and I had my mech disassemble the jugs to ensure they
were assembled correctly. Perhaps a mistake was made during reassembly.
The engine has always been very stiff and I don't recall every making a full
360.
The engine was not pickled, but as stated earlier, was oiled well during
assymbly and has been at 70 degrees year round with desicator plugs in each
of the upper plug holes. Moisture doesn't seem to be an issue. I'm not
sure how to check for the the pushrods but will remove the valve covers and
start trying to isolate the cause.
Thanks for your response,
Jim
> How is the feel of the "hang"? Solid with a Clonk, solid but not so
> Clonky -
> rather giving for a few thousandth before to stop, or mushy?
>
> Was the engine rotated before, when fresh from overhaul?
>
> There is another type of FO possible: many mechanics use pieces of split
> rubber hose to hold the conrods upright when joining the two half-cases.
> Forget to remove one (unlikely, but can still happen...), and it can get
> stuck between the crankshaft anf the cylinder's skirt. It may even allow
> the
> engine to be rotated a few times before to wedge itself.
>
> Internal corrosion can also do... pray not! A stuck valve can do too, and
> this can be a result of corrosion on the stem.
>
> Was the engine "pickled"?
>
> The "feel" helps a lot in determining what's wrong, and unfortunately
this
> can't be sent through e-mail...
>
> Rotate slowly, listen attentively, feel through your fingers. Remove the
> valve covers and check the pushrods. See if the blockage happens when one
> particular rocker starts pushing on one valve.
>
> Regards
>
> Philip
>
> -----Original Message-----
> From: owner-engines-list-server@matronics.com
> [mailto:owner-engines-list-server@matronics.com]On Behalf Of Jim Stone
> To: engines-list@matronics.com
> Subject: Re: Engines-List: Engine won't rotate by hand a full 360
> degrees
>
>
> --> Engines-List message posted by: "Jim Stone" <jrstone@insightbb.com>
>
> Thanks Archie, I was hoping you would give me you opinion.
> Not sure about the rings. Probably Lycoming but not sure.
> The cylinders are new. I ordered new jugs from Lycoming and had
> Performance
> Aero flow balance and install 10 to 1 forged pistons. The engine was
> overhauled 3 years ago and has been at constant temp and humidity since
> (in
> my basement workshop).
> Hope this additional info helps,
> Jim
>
> ----- Original Message -----
> From: "Archie" <archie97@earthlink.net>
> To: <engines-list@matronics.com>
> Subject: Re: Engines-List: Engine won't rotate by hand a full 360 degrees
>
>
>> --> Engines-List message posted by: "Archie" <archie97@earthlink.net>
>>
>> Excessive choke and tight ring gaps will do it.
>> If you are using standard aircraft rings, should not be a problem,
though
>> you can normally drive a truck through the gaps.
>> Are the cylinders oversize? Were they bored correctly?
>> Archie
>> Archie's Racing Service
>> ----- Original Message -----
>> From: "Jim Stone" <jrstone@insightbb.com>
>> To: <engines-list@matronics.com>
>> Subject: Engines-List: Engine won't rotate by hand a full 360 degrees
>>
>>
>>> --> Engines-List message posted by: "Jim Stone" <jrstone@insightbb.com>
>>>
>>> I have a 0 time overhauled Lyc 540 and while attempting to set the mag.
>>> I was rotating the engine with the starter ring or flywheel (prop not
>>> installed) and noticed the engine would stop at one point while
rotating
>>> clockwise (60degrees btdc) and at a slightly different place when
>>> rotating
>>> counterclockwise(40 degrees btdc).
>>> At both hang points, no piston was approaching TDC (indicating no FOD
in
>>> cylinder). I removed the mag but no improvement.
>>> Anyone have any ideas on what might cause this and what I need to do to
>>> correct it?
>>> Thanks,
>>> Jim
>>>
>>>
>>>
>>
>>
>
>
>
Message 9
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| Subject: | Engine won't rotate by hand a full 360 degrees |
--> Engines-List message posted by: "Jim Stone" <jrstone@insightbb.com>
Say it ain't so.
Jim
----- Original Message -----
From: "steve korney" <s_korney@hotmail.com>
Subject: Re: Engines-List: Engine won't rotate by hand a full 360 degrees
> --> Engines-List message posted by: "steve korney" <s_korney@hotmail.com>
>
>
> Jim...
>
> Could be in the assesory case...Maybe even the oil pump...Or the fuel pump
> push rod...
>
> Best... Steve
>
>
> ----Original Message Follows----
> From: "Jim Stone" <jrstone@insightbb.com>
> To: <engines-list@matronics.com>
> Subject: Re: Engines-List: Engine won't rotate by hand a full 360 degrees
> Date: Wed, 21 Dec 2005 09:27:34 -0500
>
> --> Engines-List message posted by: "Jim Stone" <jrstone@insightbb.com>
>
> Philip,
> The hang is solid, firm not mushy and has sort of a clunk that can be felt
> in the accessory section, which is why I removed the mag. I was present
> for
> most of the overhaul and I had my mech disassemble the jugs to ensure they
> were assembled correctly. Perhaps a mistake was made during reassembly.
>
> The engine has always been very stiff and I don't recall every making a
> full
> 360.
>
> The engine was not pickled, but as stated earlier, was oiled well during
> assymbly and has been at 70 degrees year round with desicator plugs in
> each
> of the upper plug holes. Moisture doesn't seem to be an issue. I'm not
> sure how to check for the the pushrods but will remove the valve covers
> and
> start trying to isolate the cause.
>
> Thanks for your response,
> Jim
>
> > How is the feel of the "hang"? Solid with a Clonk, solid but not so
> > Clonky -
> > rather giving for a few thousandth before to stop, or mushy?
> >
> > Was the engine rotated before, when fresh from overhaul?
> >
> > There is another type of FO possible: many mechanics use pieces of split
> > rubber hose to hold the conrods upright when joining the two half-cases.
> > Forget to remove one (unlikely, but can still happen...), and it can get
> > stuck between the crankshaft anf the cylinder's skirt. It may even allow
> > the
> > engine to be rotated a few times before to wedge itself.
> >
> > Internal corrosion can also do... pray not! A stuck valve can do too,
> > and
> > this can be a result of corrosion on the stem.
> >
> > Was the engine "pickled"?
> >
> > The "feel" helps a lot in determining what's wrong, and unfortunately
> this
> > can't be sent through e-mail...
> >
> > Rotate slowly, listen attentively, feel through your fingers. Remove the
> > valve covers and check the pushrods. See if the blockage happens when
> > one
> > particular rocker starts pushing on one valve.
> >
> > Regards
> >
> > Philip
> >
> > -----Original Message-----
> > From: owner-engines-list-server@matronics.com
> > [mailto:owner-engines-list-server@matronics.com]On Behalf Of Jim Stone
> > To: engines-list@matronics.com
> > Subject: Re: Engines-List: Engine won't rotate by hand a full 360
> > degrees
> >
> >
> > --> Engines-List message posted by: "Jim Stone" <jrstone@insightbb.com>
> >
> > Thanks Archie, I was hoping you would give me you opinion.
> > Not sure about the rings. Probably Lycoming but not sure.
> > The cylinders are new. I ordered new jugs from Lycoming and had
> > Performance
> > Aero flow balance and install 10 to 1 forged pistons. The engine was
> > overhauled 3 years ago and has been at constant temp and humidity since
> > (in
> > my basement workshop).
> > Hope this additional info helps,
> > Jim
> >
> > ----- Original Message -----
> > From: "Archie" <archie97@earthlink.net>
> > To: <engines-list@matronics.com>
> > Subject: Re: Engines-List: Engine won't rotate by hand a full 360
> > degrees
> >
> >
> >> --> Engines-List message posted by: "Archie" <archie97@earthlink.net>
> >>
> >> Excessive choke and tight ring gaps will do it.
> >> If you are using standard aircraft rings, should not be a problem,
> though
> >> you can normally drive a truck through the gaps.
> >> Are the cylinders oversize? Were they bored correctly?
> >> Archie
> >> Archie's Racing Service
> >> ----- Original Message -----
> >> From: "Jim Stone" <jrstone@insightbb.com>
> >> To: <engines-list@matronics.com>
> >> Subject: Engines-List: Engine won't rotate by hand a full 360 degrees
> >>
> >>
> >>> --> Engines-List message posted by: "Jim Stone"
> >>> <jrstone@insightbb.com>
> >>>
> >>> I have a 0 time overhauled Lyc 540 and while attempting to set the
> >>> mag.
> >>> I was rotating the engine with the starter ring or flywheel (prop not
> >>> installed) and noticed the engine would stop at one point while
> rotating
> >>> clockwise (60degrees btdc) and at a slightly different place when
> >>> rotating
> >>> counterclockwise(40 degrees btdc).
> >>> At both hang points, no piston was approaching TDC (indicating no FOD
> in
> >>> cylinder). I removed the mag but no improvement.
> >>> Anyone have any ideas on what might cause this and what I need to do
> >>> to
> >>> correct it?
> >>> Thanks,
> >>> Jim
> >>>
> >>>
> >>>
> >>
> >>
> >
> >
> >
>
>
>
Message 10
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|
| Subject: | Re: Engine won't rotate by hand a full 360 degrees |
--> Engines-List message posted by: "Archie" <archie97@earthlink.net>
Not likely in the accessory case based on your description and symptoms,
(but possible). The crankshaft gear is one of the smallest in there, and to
rotate
the crank in either direction around 350 deg."almost" dismisses that
probability.
----- Original Message -----
From: "Jim Stone" <jrstone@insightbb.com>
Subject: Fw: Engines-List: Engine won't rotate by hand a full 360 degrees
> --> Engines-List message posted by: "Jim Stone" <jrstone@insightbb.com>
>
> Say it ain't so.
> Jim
> ----- Original Message -----
> From: "steve korney" <s_korney@hotmail.com>
> To: <engines-list@matronics.com>
> Subject: Re: Engines-List: Engine won't rotate by hand a full 360 degrees
>
>
>> --> Engines-List message posted by: "steve korney" <s_korney@hotmail.com>
>>
>>
>> Jim...
>>
>> Could be in the assesory case...Maybe even the oil pump...Or the fuel
>> pump
>> push rod...
>>
>> Best... Steve
>>
>>
>> ----Original Message Follows----
>> From: "Jim Stone" <jrstone@insightbb.com>
>> To: <engines-list@matronics.com>
>> Subject: Re: Engines-List: Engine won't rotate by hand a full 360 degrees
>> Date: Wed, 21 Dec 2005 09:27:34 -0500
>>
>> --> Engines-List message posted by: "Jim Stone" <jrstone@insightbb.com>
>>
>> Philip,
>> The hang is solid, firm not mushy and has sort of a clunk that can be
>> felt
>> in the accessory section, which is why I removed the mag. I was present
>> for
>> most of the overhaul and I had my mech disassemble the jugs to ensure
>> they
>> were assembled correctly. Perhaps a mistake was made during reassembly.
>>
>> The engine has always been very stiff and I don't recall every making a
>> full
>> 360.
>>
>> The engine was not pickled, but as stated earlier, was oiled well during
>> assymbly and has been at 70 degrees year round with desicator plugs in
>> each
>> of the upper plug holes. Moisture doesn't seem to be an issue. I'm not
>> sure how to check for the the pushrods but will remove the valve covers
>> and
>> start trying to isolate the cause.
>>
>> Thanks for your response,
>> Jim
>>
>> > How is the feel of the "hang"? Solid with a Clonk, solid but not so
>> > Clonky -
>> > rather giving for a few thousandth before to stop, or mushy?
>> >
>> > Was the engine rotated before, when fresh from overhaul?
>> >
>> > There is another type of FO possible: many mechanics use pieces of
>> > split
>> > rubber hose to hold the conrods upright when joining the two
>> > half-cases.
>> > Forget to remove one (unlikely, but can still happen...), and it can
>> > get
>> > stuck between the crankshaft anf the cylinder's skirt. It may even
>> > allow
>> > the
>> > engine to be rotated a few times before to wedge itself.
>> >
>> > Internal corrosion can also do... pray not! A stuck valve can do too,
>> > and
>> > this can be a result of corrosion on the stem.
>> >
>> > Was the engine "pickled"?
>> >
>> > The "feel" helps a lot in determining what's wrong, and unfortunately
>> this
>> > can't be sent through e-mail...
>> >
>> > Rotate slowly, listen attentively, feel through your fingers. Remove
>> > the
>> > valve covers and check the pushrods. See if the blockage happens when
>> > one
>> > particular rocker starts pushing on one valve.
>> >
>> > Regards
>> >
>> > Philip
>> >
>> > -----Original Message-----
>> > From: owner-engines-list-server@matronics.com
>> > [mailto:owner-engines-list-server@matronics.com]On Behalf Of Jim Stone
>> > To: engines-list@matronics.com
>> > Subject: Re: Engines-List: Engine won't rotate by hand a full 360
>> > degrees
>> >
>> >
>> > --> Engines-List message posted by: "Jim Stone" <jrstone@insightbb.com>
>> >
>> > Thanks Archie, I was hoping you would give me you opinion.
>> > Not sure about the rings. Probably Lycoming but not sure.
>> > The cylinders are new. I ordered new jugs from Lycoming and had
>> > Performance
>> > Aero flow balance and install 10 to 1 forged pistons. The engine was
>> > overhauled 3 years ago and has been at constant temp and humidity since
>> > (in
>> > my basement workshop).
>> > Hope this additional info helps,
>> > Jim
>> >
>> > ----- Original Message -----
>> > From: "Archie" <archie97@earthlink.net>
>> > To: <engines-list@matronics.com>
>> > Subject: Re: Engines-List: Engine won't rotate by hand a full 360
>> > degrees
>> >
>> >
>> >> --> Engines-List message posted by: "Archie" <archie97@earthlink.net>
>> >>
>> >> Excessive choke and tight ring gaps will do it.
>> >> If you are using standard aircraft rings, should not be a problem,
>> though
>> >> you can normally drive a truck through the gaps.
>> >> Are the cylinders oversize? Were they bored correctly?
>> >> Archie
>> >> Archie's Racing Service
>> >> ----- Original Message -----
>> >> From: "Jim Stone" <jrstone@insightbb.com>
>> >> To: <engines-list@matronics.com>
>> >> Subject: Engines-List: Engine won't rotate by hand a full 360 degrees
>> >>
>> >>
>> >>> --> Engines-List message posted by: "Jim Stone"
>> >>> <jrstone@insightbb.com>
>> >>>
>> >>> I have a 0 time overhauled Lyc 540 and while attempting to set the
>> >>> mag.
>> >>> I was rotating the engine with the starter ring or flywheel (prop not
>> >>> installed) and noticed the engine would stop at one point while
>> rotating
>> >>> clockwise (60degrees btdc) and at a slightly different place when
>> >>> rotating
>> >>> counterclockwise(40 degrees btdc).
>> >>> At both hang points, no piston was approaching TDC (indicating no FOD
>> in
>> >>> cylinder). I removed the mag but no improvement.
>> >>> Anyone have any ideas on what might cause this and what I need to do
>> >>> to
>> >>> correct it?
>> >>> Thanks,
>> >>> Jim
>> >>>
>> >>>
>> >>>
>> >>
>> >>
>> >
>> >
>> >
>>
>>
>>
>
>
>
Message 11
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|
| Subject: | Re: Engine won't rotate by hand a full 360 degrees |
--> Engines-List message posted by: "Ken Johnson" <glasair@epix.net>
Jim,
An easy thing to do would be to check for a valve contacting the top of
a piston by removing the spark plugs. This could be caused by either a stuck
valve or a lifter stuck in the fully pumped up position.
Good luck
Ken Johnson
----- Original Message -----
From: "Archie" <archie97@earthlink.net>
Subject: Re: Engines-List: Engine won't rotate by hand a full 360 degrees
> --> Engines-List message posted by: "Archie" <archie97@earthlink.net>
>
> Not likely in the accessory case based on your description and symptoms,
> (but possible). The crankshaft gear is one of the smallest in there, and
to
> rotate
> the crank in either direction around 350 deg."almost" dismisses that
> probability.
>
> ----- Original Message -----
> From: "Jim Stone" <jrstone@insightbb.com>
> To: <engines-list@matronics.com>
> Subject: Fw: Engines-List: Engine won't rotate by hand a full 360 degrees
>
>
> > --> Engines-List message posted by: "Jim Stone" <jrstone@insightbb.com>
> >
> > Say it ain't so.
> > Jim
> > ----- Original Message -----
> > From: "steve korney" <s_korney@hotmail.com>
> > To: <engines-list@matronics.com>
> > Subject: Re: Engines-List: Engine won't rotate by hand a full 360
degrees
> >
> >
> >> --> Engines-List message posted by: "steve korney"
<s_korney@hotmail.com>
> >>
> >>
> >> Jim...
> >>
> >> Could be in the assesory case...Maybe even the oil pump...Or the fuel
> >> pump
> >> push rod...
> >>
> >> Best... Steve
> >>
> >>
> >> ----Original Message Follows----
> >> From: "Jim Stone" <jrstone@insightbb.com>
> >> To: <engines-list@matronics.com>
> >> Subject: Re: Engines-List: Engine won't rotate by hand a full 360
degrees
> >> Date: Wed, 21 Dec 2005 09:27:34 -0500
> >>
> >> --> Engines-List message posted by: "Jim Stone" <jrstone@insightbb.com>
> >>
> >> Philip,
> >> The hang is solid, firm not mushy and has sort of a clunk that can be
> >> felt
> >> in the accessory section, which is why I removed the mag. I was
present
> >> for
> >> most of the overhaul and I had my mech disassemble the jugs to ensure
> >> they
> >> were assembled correctly. Perhaps a mistake was made during
reassembly.
> >>
> >> The engine has always been very stiff and I don't recall every making a
> >> full
> >> 360.
> >>
> >> The engine was not pickled, but as stated earlier, was oiled well
during
> >> assymbly and has been at 70 degrees year round with desicator plugs in
> >> each
> >> of the upper plug holes. Moisture doesn't seem to be an issue. I'm
not
> >> sure how to check for the the pushrods but will remove the valve covers
> >> and
> >> start trying to isolate the cause.
> >>
> >> Thanks for your response,
> >> Jim
> >>
> >> > How is the feel of the "hang"? Solid with a Clonk, solid but not so
> >> > Clonky -
> >> > rather giving for a few thousandth before to stop, or mushy?
> >> >
> >> > Was the engine rotated before, when fresh from overhaul?
> >> >
> >> > There is another type of FO possible: many mechanics use pieces of
> >> > split
> >> > rubber hose to hold the conrods upright when joining the two
> >> > half-cases.
> >> > Forget to remove one (unlikely, but can still happen...), and it can
> >> > get
> >> > stuck between the crankshaft anf the cylinder's skirt. It may even
> >> > allow
> >> > the
> >> > engine to be rotated a few times before to wedge itself.
> >> >
> >> > Internal corrosion can also do... pray not! A stuck valve can do too,
> >> > and
> >> > this can be a result of corrosion on the stem.
> >> >
> >> > Was the engine "pickled"?
> >> >
> >> > The "feel" helps a lot in determining what's wrong, and unfortunately
> >> this
> >> > can't be sent through e-mail...
> >> >
> >> > Rotate slowly, listen attentively, feel through your fingers. Remove
> >> > the
> >> > valve covers and check the pushrods. See if the blockage happens when
> >> > one
> >> > particular rocker starts pushing on one valve.
> >> >
> >> > Regards
> >> >
> >> > Philip
> >> >
> >> > -----Original Message-----
> >> > From: owner-engines-list-server@matronics.com
> >> > [mailto:owner-engines-list-server@matronics.com]On Behalf Of Jim
Stone
> >> > To: engines-list@matronics.com
> >> > Subject: Re: Engines-List: Engine won't rotate by hand a full 360
> >> > degrees
> >> >
> >> >
> >> > --> Engines-List message posted by: "Jim Stone"
<jrstone@insightbb.com>
> >> >
> >> > Thanks Archie, I was hoping you would give me you opinion.
> >> > Not sure about the rings. Probably Lycoming but not sure.
> >> > The cylinders are new. I ordered new jugs from Lycoming and had
> >> > Performance
> >> > Aero flow balance and install 10 to 1 forged pistons. The engine was
> >> > overhauled 3 years ago and has been at constant temp and humidity
since
> >> > (in
> >> > my basement workshop).
> >> > Hope this additional info helps,
> >> > Jim
> >> >
> >> > ----- Original Message -----
> >> > From: "Archie" <archie97@earthlink.net>
> >> > To: <engines-list@matronics.com>
> >> > Subject: Re: Engines-List: Engine won't rotate by hand a full 360
> >> > degrees
> >> >
> >> >
> >> >> --> Engines-List message posted by: "Archie"
<archie97@earthlink.net>
> >> >>
> >> >> Excessive choke and tight ring gaps will do it.
> >> >> If you are using standard aircraft rings, should not be a problem,
> >> though
> >> >> you can normally drive a truck through the gaps.
> >> >> Are the cylinders oversize? Were they bored correctly?
> >> >> Archie
> >> >> Archie's Racing Service
> >> >> ----- Original Message -----
> >> >> From: "Jim Stone" <jrstone@insightbb.com>
> >> >> To: <engines-list@matronics.com>
> >> >> Subject: Engines-List: Engine won't rotate by hand a full 360
degrees
> >> >>
> >> >>
> >> >>> --> Engines-List message posted by: "Jim Stone"
> >> >>> <jrstone@insightbb.com>
> >> >>>
> >> >>> I have a 0 time overhauled Lyc 540 and while attempting to set the
> >> >>> mag.
> >> >>> I was rotating the engine with the starter ring or flywheel (prop
not
> >> >>> installed) and noticed the engine would stop at one point while
> >> rotating
> >> >>> clockwise (60degrees btdc) and at a slightly different place when
> >> >>> rotating
> >> >>> counterclockwise(40 degrees btdc).
> >> >>> At both hang points, no piston was approaching TDC (indicating no
FOD
> >> in
> >> >>> cylinder). I removed the mag but no improvement.
> >> >>> Anyone have any ideas on what might cause this and what I need to
do
> >> >>> to
> >> >>> correct it?
> >> >>> Thanks,
> >> >>> Jim
> >> >>>
> >> >>>
> >> >>>
> >> >>
> >> >>
> >> >
> >> >
> >> >
> >>
> >>
> >>
> >
> >
> >
>
>
Message 12
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|
| Subject: | Re: Engine won't rotate by hand a full 360 degrees |
--> Engines-List message posted by: "Archie" <archie97@earthlink.net>
Good point.
Simply remove the rocker arms. That should eliminate valve movement,
and if the crank turns easily 720+ degrees, you have isolated the problem.
----- Original Message -----
From: "Ken Johnson" <glasair@epix.net>
Subject: Re: Engines-List: Engine won't rotate by hand a full 360 degrees
> --> Engines-List message posted by: "Ken Johnson" <glasair@epix.net>
>
> Jim,
> An easy thing to do would be to check for a valve contacting the top of
> a piston by removing the spark plugs. This could be caused by either a
> stuck
> valve or a lifter stuck in the fully pumped up position.
> Good luck
> Ken Johnson
> ----- Original Message -----
> From: "Archie" <archie97@earthlink.net>
> To: <engines-list@matronics.com>
> Subject: Re: Engines-List: Engine won't rotate by hand a full 360 degrees
>
>
>> --> Engines-List message posted by: "Archie" <archie97@earthlink.net>
>>
>> Not likely in the accessory case based on your description and symptoms,
>> (but possible). The crankshaft gear is one of the smallest in there, and
> to
>> rotate
>> the crank in either direction around 350 deg."almost" dismisses that
>> probability.
>>
>> ----- Original Message -----
>> From: "Jim Stone" <jrstone@insightbb.com>
>> To: <engines-list@matronics.com>
>> Subject: Fw: Engines-List: Engine won't rotate by hand a full 360 degrees
>>
>>
>> > --> Engines-List message posted by: "Jim Stone" <jrstone@insightbb.com>
>> >
>> > Say it ain't so.
>> > Jim
>> > ----- Original Message -----
>> > From: "steve korney" <s_korney@hotmail.com>
>> > To: <engines-list@matronics.com>
>> > Subject: Re: Engines-List: Engine won't rotate by hand a full 360
> degrees
>> >
>> >
>> >> --> Engines-List message posted by: "steve korney"
> <s_korney@hotmail.com>
>> >>
>> >>
>> >> Jim...
>> >>
>> >> Could be in the assesory case...Maybe even the oil pump...Or the fuel
>> >> pump
>> >> push rod...
>> >>
>> >> Best... Steve
>> >>
>> >>
>> >> ----Original Message Follows----
>> >> From: "Jim Stone" <jrstone@insightbb.com>
>> >> To: <engines-list@matronics.com>
>> >> Subject: Re: Engines-List: Engine won't rotate by hand a full 360
> degrees
>> >> Date: Wed, 21 Dec 2005 09:27:34 -0500
>> >>
>> >> --> Engines-List message posted by: "Jim Stone"
>> >> <jrstone@insightbb.com>
>> >>
>> >> Philip,
>> >> The hang is solid, firm not mushy and has sort of a clunk that can be
>> >> felt
>> >> in the accessory section, which is why I removed the mag. I was
> present
>> >> for
>> >> most of the overhaul and I had my mech disassemble the jugs to ensure
>> >> they
>> >> were assembled correctly. Perhaps a mistake was made during
> reassembly.
>> >>
>> >> The engine has always been very stiff and I don't recall every making
>> >> a
>> >> full
>> >> 360.
>> >>
>> >> The engine was not pickled, but as stated earlier, was oiled well
> during
>> >> assymbly and has been at 70 degrees year round with desicator plugs in
>> >> each
>> >> of the upper plug holes. Moisture doesn't seem to be an issue. I'm
> not
>> >> sure how to check for the the pushrods but will remove the valve
>> >> covers
>> >> and
>> >> start trying to isolate the cause.
>> >>
>> >> Thanks for your response,
>> >> Jim
>> >>
>> >> > How is the feel of the "hang"? Solid with a Clonk, solid but not so
>> >> > Clonky -
>> >> > rather giving for a few thousandth before to stop, or mushy?
>> >> >
>> >> > Was the engine rotated before, when fresh from overhaul?
>> >> >
>> >> > There is another type of FO possible: many mechanics use pieces of
>> >> > split
>> >> > rubber hose to hold the conrods upright when joining the two
>> >> > half-cases.
>> >> > Forget to remove one (unlikely, but can still happen...), and it can
>> >> > get
>> >> > stuck between the crankshaft anf the cylinder's skirt. It may even
>> >> > allow
>> >> > the
>> >> > engine to be rotated a few times before to wedge itself.
>> >> >
>> >> > Internal corrosion can also do... pray not! A stuck valve can do
>> >> > too,
>> >> > and
>> >> > this can be a result of corrosion on the stem.
>> >> >
>> >> > Was the engine "pickled"?
>> >> >
>> >> > The "feel" helps a lot in determining what's wrong, and
>> >> > unfortunately
>> >> this
>> >> > can't be sent through e-mail...
>> >> >
>> >> > Rotate slowly, listen attentively, feel through your fingers. Remove
>> >> > the
>> >> > valve covers and check the pushrods. See if the blockage happens
>> >> > when
>> >> > one
>> >> > particular rocker starts pushing on one valve.
>> >> >
>> >> > Regards
>> >> >
>> >> > Philip
>> >> >
>> >> > -----Original Message-----
>> >> > From: owner-engines-list-server@matronics.com
>> >> > [mailto:owner-engines-list-server@matronics.com]On Behalf Of Jim
> Stone
>> >> > To: engines-list@matronics.com
>> >> > Subject: Re: Engines-List: Engine won't rotate by hand a full 360
>> >> > degrees
>> >> >
>> >> >
>> >> > --> Engines-List message posted by: "Jim Stone"
> <jrstone@insightbb.com>
>> >> >
>> >> > Thanks Archie, I was hoping you would give me you opinion.
>> >> > Not sure about the rings. Probably Lycoming but not sure.
>> >> > The cylinders are new. I ordered new jugs from Lycoming and had
>> >> > Performance
>> >> > Aero flow balance and install 10 to 1 forged pistons. The engine
>> >> > was
>> >> > overhauled 3 years ago and has been at constant temp and humidity
> since
>> >> > (in
>> >> > my basement workshop).
>> >> > Hope this additional info helps,
>> >> > Jim
>> >> >
>> >> > ----- Original Message -----
>> >> > From: "Archie" <archie97@earthlink.net>
>> >> > To: <engines-list@matronics.com>
>> >> > Subject: Re: Engines-List: Engine won't rotate by hand a full 360
>> >> > degrees
>> >> >
>> >> >
>> >> >> --> Engines-List message posted by: "Archie"
> <archie97@earthlink.net>
>> >> >>
>> >> >> Excessive choke and tight ring gaps will do it.
>> >> >> If you are using standard aircraft rings, should not be a problem,
>> >> though
>> >> >> you can normally drive a truck through the gaps.
>> >> >> Are the cylinders oversize? Were they bored correctly?
>> >> >> Archie
>> >> >> Archie's Racing Service
>> >> >> ----- Original Message -----
>> >> >> From: "Jim Stone" <jrstone@insightbb.com>
>> >> >> To: <engines-list@matronics.com>
>> >> >> Subject: Engines-List: Engine won't rotate by hand a full 360
> degrees
>> >> >>
>> >> >>
>> >> >>> --> Engines-List message posted by: "Jim Stone"
>> >> >>> <jrstone@insightbb.com>
>> >> >>>
>> >> >>> I have a 0 time overhauled Lyc 540 and while attempting to set the
>> >> >>> mag.
>> >> >>> I was rotating the engine with the starter ring or flywheel (prop
> not
>> >> >>> installed) and noticed the engine would stop at one point while
>> >> rotating
>> >> >>> clockwise (60degrees btdc) and at a slightly different place when
>> >> >>> rotating
>> >> >>> counterclockwise(40 degrees btdc).
>> >> >>> At both hang points, no piston was approaching TDC (indicating no
> FOD
>> >> in
>> >> >>> cylinder). I removed the mag but no improvement.
>> >> >>> Anyone have any ideas on what might cause this and what I need to
> do
>> >> >>> to
>> >> >>> correct it?
>> >> >>> Thanks,
>> >> >>> Jim
>> >> >>>
>> >> >>>
>> >> >>>
>> >> >>
>> >> >>
>> >> >
>> >> >
>> >> >
>> >>
>> >>
>> >>
>> >
>> >
>> >
>>
>>
>
>
>
Message 13
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|
| Subject: | Re: Engines-List Digest: 4 Msgs - 12/20/05 |
--> Engines-List message posted by: TBelvin38@aol.com
Sir, you may have something stuck on the crank gear. You may be able to see
through the mag hole into the acc case. What ever you do don't force it.Who
did
the rebuild on it? Best of luck.
Tom Belvin A&P
Message 14
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| Subject: | Re: Engine won't rotate by hand a full 360 degrees |
--> Engines-List message posted by: "Jim Stone" <jrstone@insightbb.com>
During the hang, no piston is near TDC, does that rule out a valve? I will
varify that again tomorrow.
Thanks,
Jim
----- Original Message -----
From: "Ken Johnson" <glasair@epix.net>
Subject: Re: Engines-List: Engine won't rotate by hand a full 360 degrees
> --> Engines-List message posted by: "Ken Johnson" <glasair@epix.net>
>
> Jim,
> An easy thing to do would be to check for a valve contacting the top of
> a piston by removing the spark plugs. This could be caused by either a
> stuck
> valve or a lifter stuck in the fully pumped up position.
> Good luck
> Ken Johnson
> ----- Original Message -----
> From: "Archie" <archie97@earthlink.net>
> To: <engines-list@matronics.com>
> Subject: Re: Engines-List: Engine won't rotate by hand a full 360 degrees
>
>
>> --> Engines-List message posted by: "Archie" <archie97@earthlink.net>
>>
>> Not likely in the accessory case based on your description and symptoms,
>> (but possible). The crankshaft gear is one of the smallest in there, and
> to
>> rotate
>> the crank in either direction around 350 deg."almost" dismisses that
>> probability.
>>
>> ----- Original Message -----
>> From: "Jim Stone" <jrstone@insightbb.com>
>> To: <engines-list@matronics.com>
>> Subject: Fw: Engines-List: Engine won't rotate by hand a full 360 degrees
>>
>>
>> > --> Engines-List message posted by: "Jim Stone" <jrstone@insightbb.com>
>> >
>> > Say it ain't so.
>> > Jim
>> > ----- Original Message -----
>> > From: "steve korney" <s_korney@hotmail.com>
>> > To: <engines-list@matronics.com>
>> > Subject: Re: Engines-List: Engine won't rotate by hand a full 360
> degrees
>> >
>> >
>> >> --> Engines-List message posted by: "steve korney"
> <s_korney@hotmail.com>
>> >>
>> >>
>> >> Jim...
>> >>
>> >> Could be in the assesory case...Maybe even the oil pump...Or the fuel
>> >> pump
>> >> push rod...
>> >>
>> >> Best... Steve
>> >>
>> >>
>> >> ----Original Message Follows----
>> >> From: "Jim Stone" <jrstone@insightbb.com>
>> >> To: <engines-list@matronics.com>
>> >> Subject: Re: Engines-List: Engine won't rotate by hand a full 360
> degrees
>> >> Date: Wed, 21 Dec 2005 09:27:34 -0500
>> >>
>> >> --> Engines-List message posted by: "Jim Stone"
>> >> <jrstone@insightbb.com>
>> >>
>> >> Philip,
>> >> The hang is solid, firm not mushy and has sort of a clunk that can be
>> >> felt
>> >> in the accessory section, which is why I removed the mag. I was
> present
>> >> for
>> >> most of the overhaul and I had my mech disassemble the jugs to ensure
>> >> they
>> >> were assembled correctly. Perhaps a mistake was made during
> reassembly.
>> >>
>> >> The engine has always been very stiff and I don't recall every making
>> >> a
>> >> full
>> >> 360.
>> >>
>> >> The engine was not pickled, but as stated earlier, was oiled well
> during
>> >> assymbly and has been at 70 degrees year round with desicator plugs in
>> >> each
>> >> of the upper plug holes. Moisture doesn't seem to be an issue. I'm
> not
>> >> sure how to check for the the pushrods but will remove the valve
>> >> covers
>> >> and
>> >> start trying to isolate the cause.
>> >>
>> >> Thanks for your response,
>> >> Jim
>> >>
>> >> > How is the feel of the "hang"? Solid with a Clonk, solid but not so
>> >> > Clonky -
>> >> > rather giving for a few thousandth before to stop, or mushy?
>> >> >
>> >> > Was the engine rotated before, when fresh from overhaul?
>> >> >
>> >> > There is another type of FO possible: many mechanics use pieces of
>> >> > split
>> >> > rubber hose to hold the conrods upright when joining the two
>> >> > half-cases.
>> >> > Forget to remove one (unlikely, but can still happen...), and it can
>> >> > get
>> >> > stuck between the crankshaft anf the cylinder's skirt. It may even
>> >> > allow
>> >> > the
>> >> > engine to be rotated a few times before to wedge itself.
>> >> >
>> >> > Internal corrosion can also do... pray not! A stuck valve can do
>> >> > too,
>> >> > and
>> >> > this can be a result of corrosion on the stem.
>> >> >
>> >> > Was the engine "pickled"?
>> >> >
>> >> > The "feel" helps a lot in determining what's wrong, and
>> >> > unfortunately
>> >> this
>> >> > can't be sent through e-mail...
>> >> >
>> >> > Rotate slowly, listen attentively, feel through your fingers. Remove
>> >> > the
>> >> > valve covers and check the pushrods. See if the blockage happens
>> >> > when
>> >> > one
>> >> > particular rocker starts pushing on one valve.
>> >> >
>> >> > Regards
>> >> >
>> >> > Philip
>> >> >
>> >> > -----Original Message-----
>> >> > From: owner-engines-list-server@matronics.com
>> >> > [mailto:owner-engines-list-server@matronics.com]On Behalf Of Jim
> Stone
>> >> > To: engines-list@matronics.com
>> >> > Subject: Re: Engines-List: Engine won't rotate by hand a full 360
>> >> > degrees
>> >> >
>> >> >
>> >> > --> Engines-List message posted by: "Jim Stone"
> <jrstone@insightbb.com>
>> >> >
>> >> > Thanks Archie, I was hoping you would give me you opinion.
>> >> > Not sure about the rings. Probably Lycoming but not sure.
>> >> > The cylinders are new. I ordered new jugs from Lycoming and had
>> >> > Performance
>> >> > Aero flow balance and install 10 to 1 forged pistons. The engine
>> >> > was
>> >> > overhauled 3 years ago and has been at constant temp and humidity
> since
>> >> > (in
>> >> > my basement workshop).
>> >> > Hope this additional info helps,
>> >> > Jim
>> >> >
>> >> > ----- Original Message -----
>> >> > From: "Archie" <archie97@earthlink.net>
>> >> > To: <engines-list@matronics.com>
>> >> > Subject: Re: Engines-List: Engine won't rotate by hand a full 360
>> >> > degrees
>> >> >
>> >> >
>> >> >> --> Engines-List message posted by: "Archie"
> <archie97@earthlink.net>
>> >> >>
>> >> >> Excessive choke and tight ring gaps will do it.
>> >> >> If you are using standard aircraft rings, should not be a problem,
>> >> though
>> >> >> you can normally drive a truck through the gaps.
>> >> >> Are the cylinders oversize? Were they bored correctly?
>> >> >> Archie
>> >> >> Archie's Racing Service
>> >> >> ----- Original Message -----
>> >> >> From: "Jim Stone" <jrstone@insightbb.com>
>> >> >> To: <engines-list@matronics.com>
>> >> >> Subject: Engines-List: Engine won't rotate by hand a full 360
> degrees
>> >> >>
>> >> >>
>> >> >>> --> Engines-List message posted by: "Jim Stone"
>> >> >>> <jrstone@insightbb.com>
>> >> >>>
>> >> >>> I have a 0 time overhauled Lyc 540 and while attempting to set the
>> >> >>> mag.
>> >> >>> I was rotating the engine with the starter ring or flywheel (prop
> not
>> >> >>> installed) and noticed the engine would stop at one point while
>> >> rotating
>> >> >>> clockwise (60degrees btdc) and at a slightly different place when
>> >> >>> rotating
>> >> >>> counterclockwise(40 degrees btdc).
>> >> >>> At both hang points, no piston was approaching TDC (indicating no
> FOD
>> >> in
>> >> >>> cylinder). I removed the mag but no improvement.
>> >> >>> Anyone have any ideas on what might cause this and what I need to
> do
>> >> >>> to
>> >> >>> correct it?
>> >> >>> Thanks,
>> >> >>> Jim
>> >> >>>
>> >> >>>
>> >> >>>
>> >> >>
>> >> >>
>> >> >
>> >> >
>> >> >
>> >>
>> >>
>> >>
>> >
>> >
>> >
>>
>>
>
>
>
Message 15
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| Subject: | Re: Engines-List Digest: 4 Msgs - 12/20/05 |
--> Engines-List message posted by: "Jim Stone" <jrstone@insightbb.com>
An old timer with hundreds of overhauls, at my local FBO. He used to work
on race cars in his earlier years.
Thanks for the steer.
Jim
----- Original Message -----
From: <TBelvin38@aol.com>
Subject: Engines-List: Re: Engines-List Digest: 4 Msgs - 12/20/05
> --> Engines-List message posted by: TBelvin38@aol.com
>
> Sir, you may have something stuck on the crank gear. You may be able to
> see
> through the mag hole into the acc case. What ever you do don't force
> it.Who
> did
> the rebuild on it? Best of luck.
> Tom Belvin A&P
>
>
>
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