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Thread: Broken J -pipes! Help and suggestions please

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  1. #1
    Senior Member CraigS's Avatar
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    I wonder if you could adapt something w/ longer bolts and springs so the joint seals but can move. See the first jpeg in the second post here;
    https://www.allpar.com/forums/thread...ctions.163374/
    Here are some parts
    https://www.amazon.com/Walker-35129-.../dp/B000CQBG1O
    Google this "spring bolt exhaust joints" for a bunch of pics and search results
    FFR MkII, 408W, Tremec TKO 500, 2015 IRS, DA QA1s, Forte front bar, APE hardtop.

  2. #2
    Senior Member wareaglescott's Avatar
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    Quote Originally Posted by CraigS View Post
    I wonder if you could adapt something w/ longer bolts and springs so the joint seals but can move. See the first jpeg in the second post here;
    https://www.allpar.com/forums/thread...ctions.163374/
    Here are some parts
    https://www.amazon.com/Walker-35129-.../dp/B000CQBG1O
    Google this "spring bolt exhaust joints" for a bunch of pics and search results
    This is an interesting though Craig. Thanks for the links.

    Since I had all the play at the beginning and now that the J pipes are welded up good and have basically zero play it seems I need a tight union at the J-pipe to header joint to keep the play down to a minimum at the far end of the pipe. I am thinking if I added these springs that would have to much of a negative effect as the play got magnified over the length of the pipe.

    I think my main problem is I now realize the J-pipes were likely already weakened or cracked that I did not notice when I installed these pipes. So my concern about the excessive droop at the end of the pipe was not actually being caused by the weight of the pipe it was being caused by the already failing J-pipe. By diagnosing the problem wrong that caused my mounting system to be wrong as well.
    Now that I have FFRs recommendation to have them welded up better as well as an additional method to support the J-pipe at the junction with the header by using the above brackets or a variation of those that ties into a header bolt I am hopeful that is a good solution. I am going to try that first and see how it goes.
    MK4 #8900 - complete kit - Coyote, TKO600, IRS - Delivered 6/28/16 First Start 10/6/16 Go cart - 10/16/16 Build completed - 4/26/17 - 302 days to build my 302 CI Coyote Cobra - Registered and street legal 5/17/17
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