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Chasing oil leaks

 
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andrew.p.sanders(at)boein
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PostPosted: Mon Mar 26, 2007 8:48 pm    Post subject: Chasing oil leaks Reply with quote

We have a O-360-A1A that was spewing about a quart of oil an hour.

So far we've taken care of the leak past the prop o-ring at the crank
nose, sealed a big leak at the case parting surface at the front of the
engine, fixed the flare at the head end of the oil drain back tube at #3
and replace the drain back hoses on #'s 2 and 4.

We're down to getting seepage from the case end of the exhaust pushrod
tube on #2, both ends of both tubes on #4. The other five seem "tight".
That is they don't easily move while the leaking ones have both a small
amount of play between the head and case and can be rotated in their
seals. With the pushrod tubes being retained by the spring
clip/retainer at the head end, there doesn't seem to be any way to
increase the preload against the base seal.

What are the tricks to getting the tubes to seal?

Thanks,
Andrew


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