Try some hylomar blue. Great stuff.
Cheers,
PeteZ
> On Jun 14, 2023, at 2:55 AM, Area-51 <goldsteinindustrial@gmail.com> wrote:
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> 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:
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> http://forums.matronics.com/viewtopic.php?p=510962#510962
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