Today's Message Index:
----------------------
1. 02:07 AM - front seal leaking (Benford2@aol.com)
2. 06:15 AM - Re: Front seal leaking. WHY? (Cy Galley)
3. 07:38 AM - (Gary Casey)
4. 12:42 PM - Re: Engines-List Digest: 3 Msgs - 01/20/03 (Jeff Green)
5. 01:07 PM - Re: Front seal leaking. WHY? (jerb)
6. 03:41 PM - Re: (N823ms@aol.com)
7. 04:39 PM - New books for Homebuilders (sonja.englert@juno.com)
8. 06:01 PM - Front seal leaking. WHY? (flyseaplane)
9. 06:03 PM - crankshaft seal (flyseaplane)
10. 06:44 PM - Re: Front seal leaking. WHY? (Martini Luc J.R.)
11. 07:26 PM - Coolent flow (Tim & Diane Shankland)
12. 08:12 PM - Re: adaptor fitting (Jim & Jeanette Oberst)
13. 08:25 PM - Re: Coolent flow (Jim and Lucy)
14. 10:03 PM - Re: Coolent flow (flyseaplane)
15. 10:15 PM - Front seal leaking. WHY? (flyseaplane)
Message 1
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| Subject: | front seal leaking |
--> Engines-List message posted by: Benford2@aol.com
I am willing to bet you left your crankcase vent pluuged up. After a period
of storage and painting it is an easy thing to forget.
Message 2
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| Subject: | Re: Front seal leaking. WHY? |
--> Engines-List message posted by: "Cy Galley" <cgalley@qcbc.org>
Did you check to see if water was dripping out of the crankcase vent tube?
Sludge and or ice have been known to increase crankcase pressure blowing out
the front seal. Are the rings seated?
Cy Galley, TC - Chair, Emergency Aircraft Repair, Oshkosh
Editor, EAA Safety Programs
cgalley@qcbc.org or experimenter@eaa.org
Always looking for articles for the Experimenter
----- Original Message -----
From: "flyseaplane" <flyseaplane@netzero.net>
Subject: Engines-List: Front seal leaking. WHY?
> --> Engines-List message posted by: "flyseaplane"
<flyseaplane@netzero.net>
>
> Hey folks -
>
> I just fired my freshly overhauled Lycoming O-290-D. It runs great and has
> 80 lbs of oil pressure. Everything was looking great, and after 10 minutes
I
> added some power to see how she pulls. All of a sudden, I start getting
some
> oil mist. I shut it down to see that the oil is pouring out between the
> crank and the seal.
>
> I know FULL WELL that I installed the spring that wraps around the inside
of
> the seal after you stretch it on into place - - why would oil be getting
> past this seal (and LOTS of it!!) I guess I need to just pull the seal
out
> and see what it looks like, but I have never seen this happen before. Have
> any of you seen this happen????
>
> Thanks,
> Linc
>
>
Message 3
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--> Engines-List message posted by: "Gary Casey" <glcasey@adelphia.net>
<<I just fired my freshly overhauled Lycoming O-290-D. It runs great and has
80 lbs of oil pressure. Everything was looking great, and after 10 minutes I
added some power to see how she pulls. All of a sudden, I start getting some
oil mist. I shut it down to see that the oil is pouring out between the
crank and the seal.
I know FULL WELL that I installed the spring that wraps around the inside of
the seal after you stretch it on into place - - why would oil be getting
past this seal (and LOTS of it!!) I guess I need to just pull the seal out
and see what it looks like, but I have never seen this happen before. Have
any of you seen this happen????>>
Any chance of a plugged crankcase vent? I've had that happen in flight with
a frozen vent line. No repair was required.
Gary Casey
Message 4
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| Subject: | Re: Engines-List Digest: 3 Msgs - 01/20/03 |
--> Engines-List message posted by: "Jeff Green" <jegreen@apexmail.com>
My friend was flying a TU206 when the engine (TSIO520) "blew up." The #1
cylinder threw the connecting rod through the case, knocked both mags off,
and made an oily mess of the windshield. Thankfully, he executed a perfect
emergency landing. He discovered that some time earlier a mechanic had
replaced the #1 cylinder with an IO-550 cylinder.
My question is, what is the difference between the cylinders, besides the
cylinder fins? Do you think having the wrong cylinder installed could have
been a factor in the catastrophic failure?
Jeff
Message 5
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| Subject: | Re: Front seal leaking. WHY? |
--> Engines-List message posted by: jerb <ulflyer@airmail.net>
Is it spinning the seal. I've experienced problems with the front seal
leaking after changing it on our 0-235. Had a very, very small leak to
start with, big leak after doing the preventative maintenance. The work
was completed by a very experienced A&I while I watched. After happening
the second time we decided that the seal would spin - especially when the
temps dropped. The last install the A&I used a little adhesive like they
use for auto repair to glue in the seals so they don't spin. That fixed
it. Never had any more problem with it for years. I think the same stuff
they use on GM vehicles would work fine.
jerb
At 01:24 AM 1/21/03 -0600, you wrote:
>--> Engines-List message posted by: "flyseaplane" <flyseaplane@netzero.net>
>
>Hey folks -
>
>I just fired my freshly overhauled Lycoming O-290-D. It runs great and has
>80 lbs of oil pressure. Everything was looking great, and after 10 minutes I
>added some power to see how she pulls. All of a sudden, I start getting some
>oil mist. I shut it down to see that the oil is pouring out between the
>crank and the seal.
>
>I know FULL WELL that I installed the spring that wraps around the inside of
>the seal after you stretch it on into place - - why would oil be getting
>past this seal (and LOTS of it!!) I guess I need to just pull the seal out
>and see what it looks like, but I have never seen this happen before. Have
>any of you seen this happen????
>
>Thanks,
>Linc
>
>
Message 6
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--> Engines-List message posted by: N823ms@aol.com
Gary:
Thanks again for the schematics of the IO-520. I am now researching
what prop I can put on this airplane. There is a prop shop here in the
Memphis area, and they say the prop is matched to the airframe. I would like
a three blade prop and I am not opposed to a good used certified prop. Any
recommendations?
Thanks,
Ed Silvanic
Message 7
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| Subject: | New books for Homebuilders |
--> Engines-List message posted by: sonja.englert@juno.com
Hi everyone,
I would like to introduce myself to this group. I am an aeronautical engineer,
pilot, airplane homebuilder and writer. I have written 3 new books for airplane
homebuilders, which you can check out on my web page www.caroengineering.com.
They are mainly for airplane homebuilders, but should be of interest to anyone
who wants to install engines, work with composites or flight test an airplane.
Cheers,
Sonja Englert
www.caroengineering.com
Message 8
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| Subject: | Front seal leaking. WHY? |
--> Engines-List message posted by: "flyseaplane" <flyseaplane@netzero.net>
"Is it spinning the seal?"
No, the seal itself is not spinning in the case. It looks like it is just
leaking out in between the crank and the seal, like the spring wasn't there,
but I know it is there, and in place. I ran the engine for about 10 minutes
at 1000-1200 to let it warm up before I gave it full power. I felt the oil
filter to make sure the oil was warm before adding power. It didn't leak any
oil until I opened it up.
Thanks for the tip, though.
Linc
Message 9
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--> Engines-List message posted by: "flyseaplane" <flyseaplane@netzero.net>
"Any chance of a plugged crankcase vent? I've had that happen in flight
with a frozen vent line. No repair was required."
Thanks, Gary. No, the vent wasn't plugged, but that is a good suggestion.
Later,
Linc
Message 10
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| Subject: | Re: Front seal leaking. WHY? |
--> Engines-List message posted by: "Martini Luc J.R." <martini@foxinternet.net>
Another possibility to consider is wear of the cam... Yep.. if a cam lobe
wears, you get not some only loss of power initially, but in short order a
lot of blow-by, that in turn will cause oil will come nearly gushing out of
the seals as well as the breather. I would suspect this if you had a cam
reground and/or the engine sat a relatively long time (known to cause
pitting of the tapets followed by rapid cam wear.
Luc Martini
----- Original Message -----
From: "flyseaplane" <flyseaplane@netzero.net>
Subject: Engines-List: Front seal leaking. WHY?
> --> Engines-List message posted by: "flyseaplane"
<flyseaplane@netzero.net>
>
>
> "Is it spinning the seal?"
>
> No, the seal itself is not spinning in the case. It looks like it is just
> leaking out in between the crank and the seal, like the spring wasn't
there,
> but I know it is there, and in place. I ran the engine for about 10
minutes
> at 1000-1200 to let it warm up before I gave it full power. I felt the oil
> filter to make sure the oil was warm before adding power. It didn't leak
any
> oil until I opened it up.
>
> Thanks for the tip, though.
> Linc
>
>
Message 11
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--> Engines-List message posted by: Tim & Diane Shankland <tshank@megsinet.net>
I am presently designing a cooling system for my Stratus. I plan to have
the radiators inside the cowling. In order not to have to do rework
after building I am first characterizing various radiators in order to
be sure they are capable of cooling the engine. There is one piece of
information I still need. Does anyone know the coolant flow rate of the
Status suburu at full power? I need an idea of how many gallons per
minute will be going through the cooling system. When I get all the math
done I will be happy to share it with anyone else trying this.
Tim Shankland
Message 12
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| Subject: | Re: adaptor fitting |
--> Engines-List message posted by: "Jim & Jeanette Oberst" <joberst@cox-internet.com>
It is considered poor practice to mount any kind of sender on the engine.
The vibration will destroy it. You should mount it solidly on the firewall
or engine mount and connect it to the engine with a flexible hose or tube.
Jim Oberst
----- Original Message -----
From: "Dave Ford" <dford@michweb.net>
Subject: Engines-List: adaptor fitting
> --> Engines-List message posted by: "Dave Ford" <dford@michweb.net>
>
> I am using an oil temp. probe that is 1/8 tapered pipe thread that has to
fit into the oil sender hole on my Lycoming O360 either the accessory case
hole or the oil filter adaptor which are the same size 5/8-18 straight
thread. I haven't been able to locate an adaptor for this. Has anyone run
into this before?
>
> Dave Ford
> RV6
>
>
Message 13
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| Subject: | Re: Coolent flow |
--> Engines-List message posted by: Jim and Lucy <jpollard@mnsi.net>
At 10:34 PM 1/21/2003 -0500, you wrote:
>--> Engines-List message posted by: Tim & Diane Shankland
><tshank@megsinet.net>
>
>I am presently designing a cooling system for my Stratus. I plan to have
>the radiators inside the cowling. In order not to have to do rework
>after building I am first characterizing various radiators in order to
>be sure they are capable of cooling the engine. There is one piece of
>information I still need. Does anyone know the coolant flow rate of the
>Status suburu at full power? I need an idea of how many gallons per
>minute will be going through the cooling system. When I get all the math
>done I will be happy to share it with anyone else trying this.
>
>Tim Shankland
The book sez
@ 4000rpm 13.2 gallons per min at a head pressure of 16.4 feet
using stock subaru plumbing components
I have specs on the rads also ( btu's etc)I could scan and send you
too much to type here.
This kind of thing would be more suited to the airsoob group
Jim Pollard
ch601hds
ea81
Message 14
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| Subject: | Re: Coolent flow |
--> Engines-List message posted by: "flyseaplane" <flyseaplane@netzero.net>
"I am presently designing a cooling system for my Stratus. I plan to have
the radiators inside the cowling."
Mr. Shankland,
Belted Air Power in Nevada uses a couple of aluminum A/C evaporator cores,
one in each cowl inlet. I have used these evaporator cores as radiators for
Rotax 912 installations, as well. ( just one needed for the 912 )
If a pair will cool a Buick V8 then they'll cool your Stratus Subaru. Even
one may be enough. You might even try a couple of aluminum automotive heater
cores. Some guys are using them on their small liquid cooled two stroke
engines. Very inexpensive and they work well for removing heat from the
coolant.
Good Luck,
Lincoln Schlecht
Tech Coun #4434
Message 15
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| Subject: | Front seal leaking. WHY? |
--> Engines-List message posted by: "flyseaplane" <flyseaplane@netzero.net>
"Another possibility to consider is wear of the cam....."
Ummmm.......shouldn't be. It's all new stuff (well, yellow tagged re-manned,
or whatever) and the engine was pickled properly after assembly and before
storage three years ago.
It has GOBS of power. Warp Drive said to set the prop at 10 degrees of
pitch, I decided to go with 13 degrees to load the engine up harder to get
the rings to seat in. It almost hit redline. I didn't have a spring scale
tied on the tailwheel, but the amount of thrust produced during the test run
was unbelievable. I'm really curious to see how she flies.
I really don't think it is the cam - the rings may not be seated yet, but I
still don't think that would cause the oil to seep out. I'll have some time
off tomorrow and I'll look everything over. Maybe pull the seal and have
look at it.
Thanks guys,
Linc
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