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Thread: Oil in cylinder

  1. #1

    Oil in cylinder

    I have a seadoo gtx with the 800 in it is pumping oil in the cylinders and fouling plugs and hydrolocking! what is the seal in the bottom of the engine that keeps the oil from leaking into the cylinders and where is it located? I have the engine out and the bottom end has been split open.
    Thanks in advance!!

    Greg


  2. #2
    2Blue's BFF! dsolie's Avatar
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    It's the inner crank seal that separates the RV bath from the rest. Those seals are NOT serviceable.

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  4. #4
    so what you are saying I need another crank or find someone to put a new seal on the crank

  5. #5
    Yes. You can get your crank rebuilt, or buy another one. That happened to me on a 1996 gsx.

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    96XPSS's Avatar
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    No, you don't need a crank, or seals!

    The 518 which was used to seal the case halves in the RV shaft cavity area, has given up. Reseal with Three Bond 1211 and put back together. Degrease the outer edges of the seals and lightly coat them with 1211 too. Pressure test for confirmation.

    The seals fail less than 5% of the time. It's always the 518.

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    96XPSS's Avatar
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    Hmm...I can't believe this thread sat all day without a post. You guys feeling guilty for trying to make him buy a crank?

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    Moderator RX951's Avatar
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    Quote Originally Posted by dsolie View Post
    It's the inner crank seal that separates the RV bath from the rest. Those seals are NOT serviceable.
    +1

    Quote Originally Posted by Piranha Performance View Post
    Yes. You can get your crank rebuilt, or buy another one. That happened to me on a 1996 gsx.
    ditto for me on a 97 GTi

  9. #9
    96XPSS's Avatar
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    RX, you had a 720 engine have this problem?

    It's funny how you guys assume it's the seals, without any consideration to the cases being the culprit. Logic tells you "it has to be a part"...right? It is a part, but the part is 518. Many have flopped the engine upside-down and pulled the bottom half, resealed, and corrected their problem. I'm not trying to be cheap either, like so many here that buy WSM pistons, because they are the cheapest. There isn't anyone on here more for doing it right the first time with the best parts. But wasting money when it's not necessary is just plain dumb. Though, if logic makes you dump $400 in a crank, and it makes you feel better to spend it, by all means...be my guest.

  10. #10
    2Blue's BFF! dsolie's Avatar
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    I have seen them fail both ways... The outer lip seal, yes, a fresh coating of 518 or 1211 (sometimes even grease) will re-seal.

    I also have seen the seals fail at the inner lip, where the spring retainer is... Those, not so easy to fix with sealant lol.

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