early 50's cub...too much oil pressure

Posted by Mark in KY on August 19, 2004 at 21:48:35 from (206.114.206.235):

Hope someone here can help me help my
dad. He has an early 50's cub that he uses to
cultivate his tobacco. When the engine's first
started while cold, the oil pressure goes way
too high, and oil begins to leak out of a small
crack in the oil filter cap (which we keep
meaning to replace). After running for a bit, the
pressure backs off to normal and everything
seems fine, no more leaks or anything else.

The relief valve has been checked, cleaned
and finally even replaced (both piston and
spring). It seemed the obvious culprit, but the
problem remained exactly the same.

What about fuel leaking into the cylinder due
to a stuck carb float, etc. while it's not running?
Is it feasible that it could leak enough fuel
down past the pistons into the crankcase,
creating too much volume, which returns to
normal after leaking a bit?

What else could cause this? Any theories are
greatly appreciated. Any similar experiences
are even better! Thanks in advance!

Follow Ups:

• is filter not filler cap.....etc. Mark in KY 07:08:19 08/23/04 (0)
• Re: early 50's cub...too much oil pressure Gene 22:32:46 08/20/04 (0)
• Oil FILTER Cap or Oil FILLER Cap? Buzzman72 08:29:47 08/20/04 (0)
• Re: early 50's cub...too much oil pressure Allan in NE 08:29:17 08/20/04 (0)
• Re: early 50's cub...too much oil pressure captaink 08:05:05 08/20/04 (0)
• Re: early 50's cub...too much oil pressure Gene 22:22:07 08/19/04 (1)
  • Re: early 50's cub...too much oil pressure John *.?-!.* cub owner 08:05:00 08/20/04 (0)

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