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  1. #1

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    Thought for sure it was...now what? Oil/coolant mix

    I'm trying to fix a friend 07 RXP that is getting lots of oil in to the cooling system. I thought for sure was was getting to be the oil cooler but does not look like it's leaking. I put it on house water hose and not a drop of water. I pressurized the coolant to about 20psi and held for a long time before it dropped a lbs.

    where do you think I should look next? Compression is about 145psi all 3 holes. Could it be head gasket? Or seal in water pump? There is no coolant in the oil. Thanks for the help
    Last edited by joewharton2; 08-31-2014 at 03:12 PM.


  2. #2

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    fracture in the block from the oil passageway or maybe head gasket leakage near an oil line in the block.

  3. #3

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    I guess my next move is to pull the head

  4. #4
    Check the seal behind the waterpump impeller.

  5. #5

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    Still having problems with oil in the cooling system. Any ideas where to go from here?
    This what I have done...
    replaced head gasket and had head milled flat
    replaced water pump seal.
    pressurized oil cooler to 80psi no leak.

  6. #6

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    Any ideas? Has anybody ran across this? Crack cases or head? No sure how to find it or where to start looking

  7. #7
    Remove the PTO cover & change the gasket. Oil will be in the water cause the Oil pressure is a lot greater than the water pressure, Proper cooler test is: Pressure test the oil cooler to the Max oil pressure the engine will see. This is a Real Oil pressure test to what the cooler is subjected to...

  8. #8

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    Quote Originally Posted by joe w View Post
    Remove the PTO cover & change the gasket. Oil will be in the water cause the Oil pressure is a lot greater than the water pressure, Proper cooler test is: Pressure test the oil cooler to the Max oil pressure the engine will see. This is a Real Oil pressure test to what the cooler is subjected to...
    I did all that and still getting oil in coolant. Pressurized the cooler to 80ish psi and did not leak.
    Last edited by joewharton2; 09-03-2014 at 06:17 PM.

  9. #9
    imp0ster's Avatar
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    you sure it's just not oil buildup in the ride plate?

  10. #10
    mibunkerking's Avatar
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    I have heard stories of the oil coolers leaking only when hot. put it some hot (160*+) and retest. better to double check it before you pull the pto cover off.

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