Today's Message Index:
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1. 12:16 AM - Re: The Obsidian Files - Speed Kit (IanGale)
2. 02:57 AM - Re: Re: Leaking cylinder head valve cover (Pete)
3. 05:43 AM - Re: Leaking cylinder head valve cover (SPURPURA)
4. 11:32 AM - Re: XS Spare Parts (clivesutton)
5. 06:18 PM - Re: The Obsidian Files - Speed Kit (Area-51)
Message 1
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| Subject: | Re: The Obsidian Files - Speed Kit |
Ah thank you both - yes, I think Ill try just the outrigger fairing next - it does
look better and seems to bring at least some benefit. Now, just need to get
it to fit over the outrigger pivot mod! Thanks again for all the work on aerodynamics,
its absolutely fascinating and Im learning a lot
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http://forums.matronics.com/viewtopic.php?p=510963#510963
Message 2
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| Subject: | Re: Leaking cylinder head valve cover |
Try some hylomar blue. Great stuff.
Cheers,
PeteZ
> On Jun 14, 2023, at 2:55 AM, Area-51 <goldsteinindustrial@gmail.com> wrote:
>
>
> 181's 80hp had weeping forward covers upon purchase... both covers were removed
and o'rings inspected for condition and seating height; all were sufficient...
both covers were assessed for warping with none identified... both head surfaces
were inspected for burring, scratches and other damage; none identified...
both covers and o'rings reinstalled with a smear of OEM factory assembly grey
engine sealant and left to cure.... just pulled the cowls after 50hrs for
service; both front covers weeping as before... pulled the worst one for another
inspection, refit and reseal... will check situation again after next 5hrs...
>
> Possible causes... High crankcase pressures and component warping at temperature;
possible but unlikely... Component Porosity; possible; replace faulty component
and monitor for further 5hrs operational time... Heat expansion of the
retaining bolt; possible; remove all covers, remachine o'ring channel for thicker
o'ring, ensure 0.040" o'ring height above cover face, refit retaining bolt
with Loctite, ensure 0.020" expansion gap between cover and head, inspect retaining
bolt tension and visual for leaks after first operational hour.
>
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> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=510962#510962
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Message 3
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| Subject: | Re: Leaking cylinder head valve cover |
Ive had that problem before. I installed the o ring as usual then clean off the
oil from the face and valve cover. Apply the same sealant used for the gearbox
onto the cover and o ring and let cure for an hour before installing. Worked
for me.
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N951EU - Tri-gear & 912ULS, N77EU- Mono & 914
I'D RATHER HAVE A BOTTLE IN FRONT OF ME THAN A FRONTAL LABOTAMY.
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http://forums.matronics.com/viewtopic.php?p=510965#510965
Message 4
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| Subject: | Re: XS Spare Parts |
Kelvin, i'd be keen to take the plenum moulding (4?) and the ductwork parts (7?),
if they are still available please?
Clive S
07771 846612
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http://forums.matronics.com/viewtopic.php?p=510966#510966
Message 5
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| Subject: | Re: The Obsidian Files - Speed Kit |
Thanks Ian,
The hinge covers are of benefit toward foreign objects etc as mentioned above.
They do not add enough significant drag to really worry about or make any detrimental
impact on overall performance.
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http://forums.matronics.com/viewtopic.php?p=510970#510970
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