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  1. #1
    PWCToday Newbie Scoochy's Avatar
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    1990 580 oil check valve HELP

    Is there some kind of inline check valve I can put in my oil line between the tank and pump. I think the original check valve must be weak and I am having trouble with the crank case loading up when the machine sits for a while

  2. #2
    PWCToday.com Is My Home Away From Home Grumpy Old Guy's Avatar
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    Re: 1990 580 oil check valve HELP

    It is the center crank seals that are leaking & requires a crank rebuild to fix.

    There are 2 fat oil lines that go to the motor from the oil tank on the intake side of the motor you can "pinch" off those lines to keep the pressure from the tank filling the motor. Remove the clamps when you use it.

  3. #3
    PWCToday Newbie Scoochy's Avatar
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    Re: 1990 580 oil check valve HELP

    The seals are only 2 yrs old. They should last longer than that shouldn’t they?

  4. #4
    PWCToday.com Is My Home Away From Home Grumpy Old Guy's Avatar
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    Re: 1990 580 oil check valve HELP

    Depends...who did the crank rebuild ??

  5. #5
    PWCToday.com Is My Home Away From Home john zigler's Avatar
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    Re: 1990 580 oil check valve HELP

    Welcome to the site.

    As Grumpy said, it is most likely inner crank seals leaking. What oil are you using? DO you stick to one brand?

    There are check valves in the intake manifold where the oil lines go to. It is rare, but I suppose they could be bad. They should hold aprox 2-3psi you could test them.

    I have also had the front RV shaft seal go bad, and fill the engine from there. Again Rare, but it can happen.

    John
    RCJS also doing business as WATCON
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