air filter getting wet with oil

Discussion in 'Mechanic and Repair' started by smokehouse, Apr 4, 2005.

  1. smokehouse

    smokehouse LawnSite Member
    Messages: 8

    hey folks

    i have a kohler command 25 that is blowing oil onto the air filter.the engine runs smooth and seems to have no loss of power.ive been told that one of the rings is probably cracked.does this sound right? the engine is not smoking either.any input would be much appreciated.
  2. fixer67

    fixer67 LawnSite Silver Member
    Messages: 2,098

    This can happen if you have too much oil in the engine. It can also happen if the rings are going bad. Does it smoke? Your PCV valve could be stuck. I would do a "leak-down" test if it came into my shop.
  3. smokehouse

    smokehouse LawnSite Member
    Messages: 8

    it doesnt smoke that i can tell.when i bought the mower the oil was showing on the safe mark but looked like it hadnt been serviced in a long time.the mower had 1200 hrs on it when i bought it. i didnt know it had a pvc valve on it but then again im not the brightest light in the house when it comes to engines.
  4. CCWKen

    CCWKen LawnSite Member
    Messages: 113

    Check to make sure the air filter is clean too. If it's soaked with oil and/or dirty, it will suck more oil.

    As Fixer67 says, the crankcase breather (PCV valve in autos) could be sticking. It's supposed to maintain a vacuum in the crankcase. If it leaks or remains open, oil will be pushed into the intake stream. With 1200 hours on the engine, that's probably what's causing the "oil injection".
  5. smokehouse

    smokehouse LawnSite Member
    Messages: 8

    thanks for the info guys. ill try the pcv valve and hope like heck thats what the problem is. once again thanks.
  6. ducky1

    ducky1 LawnSite Senior Member
    Messages: 252

    Might be a blown head gasket.

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