Posted by PJH on May 07, 2016 at 12:39:10 from (50.40.223.68):
My CH18S Kohler engine walked the crankshaft oil seal out at 600 hours. Luckily, I noticed it and shut it down before it lost all of the oil. The original seal is rubber covered - the seal # is NOK AE7782E. I haven't been able to find an alternative to this seal that will fit the need. What troubles me - the old seal looked real good, but the OD is 2.375", and the block recess that it fits in measures 2.390". I can slip it in and out with my fingers. The new seal O.D. measures 2.378". I haven't tried installing the new one yet, for obvious reasons. Internet videos recommend using red Loctite around the outer mating surfaces, but the Loctite products say "Not for use on plastics", so I'm wondering about using it on this coated seal. The local dealer/mechanic says DON'T use any sealer around the outer mating surfaces. He implied that this seal failure is expected at around 600 hour intervals. I don't like that.
There's lots of good thinkers on this board - do any of you guys have any advice?
Here's a description of the seal and engine recess, as measured;
Seal number NOK AE7782E 1.50" crankshaft measured diameter 2.390" engine recess measured diameter 0.310" measured seal thickness Double lip seal Garter spring Rubber/plastic? coated
As mentioned above - the old seal O.D. measures 2.375" the new seal O.D. measures 2.378"
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