Today's Message Index:
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1. 06:40 AM - Re: Re: Engine Won't rotate (jrc)
2. 07:48 AM - Re: Re: Engine Won't rotateEngine Won't rotate (Wes Bunker)
3. 08:15 AM - Non Rotation (Bob & Toodie Marshall)
4. 12:34 PM - Re: Re: Engine Won't rotate (Harvey Rule)
Message 1
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| Subject: | Re: Engine Won't rotate |
--> Engines-List message posted by: "jrc" <jrccea@bellsouth.net>
.Good Show !!!
What a wonderful Christmas present !
All the best,
JimC
----- Original Message -----
From: "Jim Stone" <jrstone@insightbb.com>
Subject: Re: Engines-List: Re: Engine Won't rotate
> --> Engines-List message posted by: "Jim Stone" <jrstone@insightbb.com>
>
> Hi Fellas,
> I've got good news! ........ The bolt I chose, stuck out the back of the
> crank flange about
> 1/2" and as I rotated the engine the bolt end was contacting the Electro
> air
> ignition pickup arm which is mounted under and just aft of the aft face of
> the crank flange.
Message 2
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| Subject: | Re: Engine Won't rotateEngine Won't rotate |
--> Engines-List message posted by: "Wes Bunker" <wesbflyer@surewest.net>
That is good news! Going thru the "discovery" process is a good exercise for
us all. Troubleshooting is an art, really, and one never loses from the
experience, even someone else's. That "step back and take another look" idea
is a good one. I use it every time I go flying. .. two wings, three wheels,
one propeller, no chains. good idea.
Wes
Message 3
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--> Engines-List message posted by: "Bob & Toodie Marshall" <rtmarshall@osb.net>
Jim, As a rocket builder/flyer I enjoy following the threads on the
rocket,engine, and aeroelectric lists. The help you were receiving was as
good as it gets for straight forward suggestions on why that puppy wouldn't
rotate. I think back on my engine at your stage and I was lucky that I had
not installed that pickup yet and I had stacked a bunch of hardware washers
under the bolts, but they did stick through some, Thanks for shedding the
light on a simple mess up, which is hard to admit to a whole bunch of
sometimes very critical people. this helps us all to be more objective and
less critical. Bob HRII, Snowing here in the high Sierras today . Do Not
Archive
Message 4
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| Subject: | Re: Engine Won't rotate |
--> Engines-List message posted by: Harvey Rule <harvey.rule@sympatico.ca>
YAAAAAAAAAAAY!;Glad to hear it all worked out for you.I'm glad it was a
simple fix.Happy New Year!
>--> Engines-List message posted by: "Jim Stone" <jrstone@insightbb.com>
>
>Hi Fellas,
>I've got good news! After pulling rocker box covers to verify valve action
>on each cylinder, I started with my next suspect area which was the
>accessory section, in particular the Mag and the Vac pad area, both of which
>I have had open post overhaul. No luck on either place. So, as all good
>troubleshooters do prior to major tear downs looking for that Gremlin, I sat
>down and starred at the engine, rethinking my strategy and attempting to
>catch what I must have overlooked. I'm a bit embarrassed to admit, but
>this is was my discovery.
>I had installed a single and temporary bolt to hold the fly-wheel to the
>crankshaft and I was turning the engine using the flywheel teeth with my
>gloved hand. The bolt I chose, stuck out the back of the crank flange about
>1/2" and as I rotated the engine the bolt end was contacting the Electro air
>ignition pickup arm which is mounted under and just aft of the aft face of
>the crank flange. Boy was I relieve to find this prior to disassembly of
>the jugs.
>I sure do appreciate all the help I got from those of you who took time to
>respond, and it gave me the motivation to get to the bottom of the problem
>ASAP.
>Thanks again guys,
>Jim Stone
>Harmon Rocket II
>
>----- Original Message -----
>From: "J. Mcculley" <mcculleyja@starpower.net>
>To: <engines-list@matronics.com>
>Subject: Engines-List: Re: Engine Won't rotate
>
>
>
>
>>--> Engines-List message posted by: "J. Mcculley"
>><mcculleyja@starpower.net>
>>
>>Jim,
>>
>>I may have missed seeing every suggestion on this stuck rotation
>>subject, but have you used a borescope to inspect the total interior of
>>every cylinder? Something left in a cylinder,or a piston touching the
>>head seems improbable since it was pointed out that the engine had to be
>>turned through more than a complete revolution to check dry tappet
>>clearances during assembly(assuming that wasn't forgotten). Therefore,
>>it seems the problem developed AFTER major assembly. However,the
>>borescope could help search the accessory case interior for something
>>created during the attachment of one of the accessories. Why not remove
>>one-by-one the fuel pump,BOTH mags,etc and test it as each is removed.
>>Using the borescope into each opening as you proceed could also be
>>helpful to see more of the case interior along the way. This would be
>>far less invasive than beginning to totally dismantle the cylinders, and
>>you mentioned feeling and/or hearing the clunk sound near the accessory
>>case as I believe I recall.
>>
>>Jim McCulley
>>
>>
>>>Jim,
>>>
>>>If it's an exhaust valve that is stuck, the piston will be on its way
>>>down,
>>>close to BDC.
>>>
>>>I'd check under the valve covers first, that's easily accessible... Then,
>>>after this is ruled out, the accessory case. Then... Do you need a full
>>>re-assembly guide, with pictures? :>)
>>>
>>>Have a nice day
>>>
>>>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>
>>>
>>>During the hang, no piston is near TDC, does that rule out a valve? I
>>>will
>>>varify that again tomorrow.
>>>Thanks,
>>>Jim
>>>
>>>
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