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  1. #1
    Rickdett's Avatar
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    Where to Start? Water in oil !!! FX SHO Waverunner

    Where to start, pull apart and pressure test the oil cooler? Or pull apart the top end to pressure test the head?

    Last summer my supercharger stopped working. When it went bad I had to ride it 20 minute to get back to dock. I checked the spark plugs and the oil and they looked great at that time. After I pulled the ski from the water I realized I had a plastic bag got sucked into the prop which probably cause the supercharger to go bad.

    I took it home I flushed it with water, soon after water showed up in the oil, originally I wondered if I ran the water for a few seconds without the motor running and caused this issue. I know the temperature warning never came on so I don’t think I over heated it.

    I replace the clutch with great help and instruction from this forum.
    Link: http://www.greenhulk.net/forums/showthread.php?t=130451

    The picture below shows the water in the oil jackets during the clutch replacement.

    Supercharger is replaced and good, runs strong again and reaches top speed.

    BUT, After a few minutes of the supercharger test ride the engine is taking on water into the engine oil to the point where the oil on the dip stick is milky white and is about a half inch higher than originally filled. I pulled the plugs they still look great no whitening on the plug like signs of a bad head gasket. In the process of the clutch replacement I change the oil 3 times to flush the system. Could the old oil with water in it have pocketed somewhere in the engine until high rpms’s where reached to merged it with the new oil? I might be guessing and wishful thinking here??

    I ran some compression tests a couple of days ago.
    Dry test:
    1 cylinder psi 93
    2 cylinder psi 83
    3 cylinder psi 88
    4 cylinder psi 105
    (The service manual calls for 86.8 psi)

    Wet (with squirt of oil) test:
    1 cylinder psi 110
    2 cylinder psi 100
    3 cylinder psi 105
    4 cylinder psi 120

    I assume these numbers are bad. This leads me to point to the head or head gasket as the culprit. Anyone have any instructions on how to pressure test the head?

    Also

    I heard someone mention might want to pressure test the oil cooler to cover all the bases, another ruled that out if the RPM’s are good, which they are.

    Great video posted by Tommy Jordan

    So where to start, pull apart and pressure test the oil cooler or pull apart the top end to pressure test the head?

    My guess is with the head. Does anyone have and additional instruction to go with the video?

    thanks
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  2. #2

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    My buddy with a fx sho just went through this and it winded up being a cracked head

  3. #3
    Rickdett's Avatar
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    Did he fix it himself?

  4. #4
    Rickdett's Avatar
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    Any thought on my compression results?

  5. #5
    Rickdett's Avatar
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    Are the oil cooler o-rings reusable?

  6. #6
    Rickdett's Avatar
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    Is the exhaust manifold gasket reusable?

  7. #7
    Rickdett's Avatar
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    UPDATE... Looks like the air cooler is the problem. See the picture of a leak with an air pressure test, leaks at circled point. I kind of ruled the air cooler out because I heard someone mention if you have full rpm speeds it probably not the problem, but it seem to be the easiest starting point to test. Although I am still concerned about the compression results. Is the air cooler serviceable or do I have to replace it?

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  8. #8
    HydroStream6's Avatar
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    Compression results are not good. I would guess the head gasket.

    Perhaps the intercooler leaked water into the engine and caused you to hydro lift the head, compromising the gasket?

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  10. #9
    hdlefler's Avatar
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    Quote Originally Posted by Rickdett View Post
    UPDATE... Looks like the air cooler is the problem. See the picture of a leak with an air pressure test, leaks at circled point. I kind of ruled the air cooler out because I heard someone mention if you have full rpm speeds it probably not the problem, but it seem to be the easiest starting point to test. Although I am still concerned about the compression results. Is the air cooler serviceable or do I have to replace it?

    Sorry to hear about your issue. I have an oem 2014 intercooler with 38 hrs. for sale if you need it.

  11. #10
    Rickdett's Avatar
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    hdlefler, pm sent

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