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oil around the head

Discussion in 'Mechanic and Repair' started by rdh, Jun 2, 2001.

  1. rdh

    rdh LawnSite Senior Member
    Messages: 394

    how can i tell if i have a blown head gasket?
    its a 25 kolher.
    has no power loss.
    runs fine.
    had gaskets replased last year.(thats what dealer said ).
    i have a great dane chariot.
    the oil spot is right by the exsaust pipe next to muffler like wear the gasket is its on the head and the jug .
    i did steam clean it but its back .icant tell why its there again.

    the numbers on motor is the good numbers(serial#).
    it has 150 hours.
  2. Richard Martin

    Richard Martin LawnSite Fanatic
    Messages: 14,699

    You can run a compression test. I don't beleive that the twin Kohlers have a compression release so it should work. Just compare the readings on both cylinders. They should be real close. It also may be leaking oil from the head gasket. If the compression is fime and you don't mind the oil leak don't worry about it. Just keep an eye on the oil level.
  3. John DiMartino

    John DiMartino LawnSite Silver Member
    Messages: 2,555

    It sounds like an oil pressure galley leak at the head gasket.I wouldnt run it like that.you are risking seizing the motor,if that small leak gets big,which it will as the hot ,oil eats away at the gasket more,you might run out of oil,or starve the rocker/valve train on that side.Just fix it or get it fixed,the leak will only get worse.Compression on my CV25 is 189 left/187 right.These engine have extremely high cranking pressure for an air cooled motor,you just want to see that the compression is within 5-8 lbs per cylinder,whatever that#is.I check my compression a lot since Im concerned about blowing another head gasket.
  4. Dave

    Dave LawnSite Senior Member
    from RI
    Messages: 315

    you might want to chk the valve covers as I have seen them leak looking like a head gasket leaking,you will want to get it hot before taking the compression test as it will expand the most when hot
  5. rdh

    rdh LawnSite Senior Member
    Messages: 394

    after washing it again and leting it run a while .its coming from the
    cover that says ohv .
    is that the valve cover ?
    i never knew it had valve covers till this new form.thanks guys
  6. Dave

    Dave LawnSite Senior Member
    from RI
    Messages: 315

    yes that is the valve covers,orings for them is just under 5 bucks
  7. Richard Martin

    Richard Martin LawnSite Fanatic
    Messages: 14,699

    The new covers are also plastic. You might have cracked it somehow.
  8. rdh

    rdh LawnSite Senior Member
    Messages: 394

    thanks guys you to eric for the new forum.i can tell i will learn alot from this one also.
    im so glad thats all it is,and not the head gasket.
  9. Chopper Lover

    Chopper Lover LawnSite Senior Member
    Messages: 288

    Here is a tip for helping find oil leaks on an engine.

    Clean the motor completely and then apply "Baby Powder Soft & Dry" spray on deoderant to the area in question. Run the motor and within a few minutes the powder will show you where any leaks are.

    I did not think this up myself... It is a Harley owners trick....


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