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  1. #1
    Vern's Avatar
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    Help with pressure testing J pipe?

    Help ... my ski is in the barn for winter and I want to pressure test the exhaust portion of my J pipe (its off the ski) ... I think I have the exit portion handled, but anybody ever done this? What did you use to seal up the V band flange part?

    The reason I would like to test ... I had my manifold bell melt off (like many) and eventually replaced it with Steve Friebe's mod manifold (awesome, still looks perfect). But I noticed even after installing the new manifold that I had some carbon on the V band clamp ... possibly from the flex portion leaking exhaust ... so I want to try to pressure test the J pipe exhaust flow for leaks.


  2. #2
    Moderator Snoman's Avatar
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    Talk Or PM Danny he might be able to help ya out...He does alot of air flow testing with these exhausts

  3. #3
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    lay the Jpipe on a flat surface, flange down, like on a table top...Look to see if there is a gap...IF NOT, there could be a gap on the manifold itself...

  4. #4
    Vern's Avatar
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    Thanks Danny, I will check that. I think the flange on both is fine, there were no carbon trails on either mating surface. It appeared that my actual flex joint is leaking exhaust tho ... not fixing my melted bell quick enough might have smoked my flex joint I think. I just wish I knew of a way to seal the flanged portion, then use some silicone tube and a pressure tester (have one of those) to put air to it and see if I have a leak ... just want to verify it before spending $$ hopefully.

  5. #5
    Hydrotoys's Avatar
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    Vern,
    One idea...
    Go to Home Depot, and find a sewer drain rubber caps that will fit the waterbox end, and cut a piece of aluminum and rubber from Ace hardware, in the shape of the flange. Drill/tap it to accept a pressure gauge. Clamp it with the stock band-clamp, and go to town.

    Spray the bellows with soap water.
    Last edited by Hydrotoys; 10-31-2007 at 05:28 PM.

  6. #6
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    Thats exactly what my father just said in an email I sent to him...

    If the internal bellows under the braid is leaking, you can't fix it...

  7. #7
    Vern's Avatar
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    Thumbs up

    Good stuff, thanks guys, that should work!

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