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  1. #1
    RUNWME's Avatar
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    GPR Muffler stay bolts broken...

    When I bought my ski, these 2 bolts were broken, so I drilled, tapped and replaced.... now one is broken again...

    Any ideas on what could be causing this?

    I replaced all my exhaust mounting brackets , red loctite and tourque all per specs...

    2 bolts in red circle.
    thanks
    David
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  2. #2
    spud's Avatar
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    When you put the stinger on make sure you snug all the mount bolts lightly the tighten all a little at a time. This will keep the stress even on the mounts. Make sure your U pipe mounts are on proper as well. Also check the engine alignment and make sure it is true. That will keep vibrations down.

    Hope that helps.

  3. #3
    WATER WOODY's Avatar
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    +1 on what Spud said.Vibration,lose bolts,misalignment will cause them to snap.

  4. #4
    HopatcongGPR's Avatar
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    pulled mine down hundreds of times over its life with me,,,never had on ebolt break. always torqued to spec.

  5. #5
    Maybe its from all those big bang NOS vibrations coming from that engine David.. Your blowin the bolts off the engine with that funny stuff..

  6. #6
    RUNWME's Avatar
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    Quote Originally Posted by rossnemo View Post
    Maybe its from all those big bang NOS vibrations coming from that engine David.. Your blowin the bolts off the engine with that funny stuff..
    Ross, the bangs from the nitrous create windows in the block. Easy fix, tear motor down, install a new rod, use some jbweld and reassemble all the pieces I can find in bottom of the hull. Its just a minor irritation really.
    Last edited by RUNWME; 12-27-2007 at 06:35 PM.

  7. #7
    Happily Self-Employed WFO's Avatar
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    Quote Originally Posted by HopatcongGPR View Post
    pulled mine down hundreds of times over its life with me,,,never had on ebolt break. always torqued to spec.
    +1

    Torqued and red loctited.

  8. #8
    Duke's Avatar
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    Getting all the bolts evenly snug helps. The 2 studs coming out of the pipe body must be snugged last or your pulling the pipe off the cylinders. If your head has been milled, the same amount removed must be added under the 2 stay brackets or your putting the pipe under stress.

  9. #9
    Canadian POWERHOUSE CanadianGPR's Avatar
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    Quote Originally Posted by Duke View Post
    Getting all the bolts evenly snug helps. The 2 studs coming out of the pipe body must be snugged last or your pulling the pipe off the cylinders. If your head has been milled, the same amount removed must be added under the 2 stay brackets or your putting the pipe under stress.
    Thanks Duke, now it have some work to do, never really thought about the milling putting stress on the exhaust. But it does make sense. You're purdy smart!!

  10. #10
    Duke's Avatar
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    Quote Originally Posted by CanadianGPR View Post
    Thanks Duke, now it have some work to do, never really thought about the milling putting stress on the exhaust. But it does make sense. You're purdy smart!!
    Just purdy............not that smart.

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