38 hp kohler engine front seal repeatedly blows out

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Old 06-28-10, 06:31 PM
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38 hp kohler engine front seal repeatedly blows out

I have a 38 hp kohler on a generator with maby 80 hrs run time and the front seal behind the flywheel has blown out repeatedly. I have replace the reed valve and the cylinders have 170-180 cylinder pressures so i dont think the rings are bad. Theres a .125 hole behind the seal at the 3 o-clock position and I have tried to blow air into it and have tried to run a flexible wire into it with no success. I was wondering if the hole can be drilled deeper so the oil can drain off and stop building pressure up and blowing the seal out. I am not sure it the hole changes angles after the hole begins or if it is a straight shot into the block. The hole is blocked for some reason. Any one have any ideals
 
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Old 07-06-10, 12:06 AM
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Does the seal fit really snug? Are you using the same seal, or have you put in a new one? Did you use any adhesive to lock the seal in when installing it?
 
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