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Thread: Brazing exhaust?

  1. #1
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    Default Brazing exhaust?

    Can you braze exhaust pipe! Recently repaired with new exhaust/ clamps (worthless)! I have acess to the equipment and would like to hit the joints in my exhaust! Is this possible and what type of sticks will work? Want to know because I will lower the system in one peice to do it if possible!
    81 CJ5 GM151 4cyl Stock

  2. #2
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    Icon91

    It would help IF you would tell us if your talking about steel or iron.
    Steel, you can braze(weld IS better)Iron, NO
    Respectfully,
    LG

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    It would be all the steel from the cat back!
    81 CJ5 GM151 4cyl Stock

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    Icon91

    Most "cats" these days are stainless steel and that can't be brazed to chrome-moly type metals.
    You are better off welding it . And it's NOT easy, If your have not done much of it.
    Most muffler shops use oxy-acetlene for this BTW.
    Respectfully,
    LG

  5. #5
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    We used to use coat hanger wire to braze it.
    79 CJ5
    258, 2barrel BBD, 2.5" lift, 31 x 10.5's, T18a w/Dana 20,
    30 front, AMC 20 rear.....
    cigarette lighter that doesn't work.

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    Icon91

    Using coat hanger wire. That is a very "mild" STEEL rod(a dang good "pur" mans welding rod ONCE you remove the finish w/scotch-brite)that is WELDING not brazing. Brazing is done with BRASS.
    Respectfully,
    LG

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    Quote Originally Posted by papaJ View Post
    We used to use coat hanger wire to braze it.
    +1 and the old coat hangers we used were actually brass. The new stuff has a brass-like or whatever coating over steel.
    1996 ZJ clean on the inside, dirty and beat up outside
    1985 J20 needs cab lights and a gun rack
    1981 Scrambler in pieces, and I mean pieces
    1975 CJ-5 shaving right-front fender flare one tree at a time
    1947 Willys runs and drives (sort of), just doesn't stop

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    Icon91

    OK that is a new one on me. I'm 58 yo and have NEVER seen a brass wired coat hanger in my life. Only knew of the steel type.
    Can someone post a picture of a BRASS coat hanger for this old man
    Back into my cave now.......
    LG

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    Quote Originally Posted by Lumpy Grits View Post
    Using coat hanger wire. That is a very "mild" STEEL rod(a dang good "pur" mans welding rod ONCE you remove the finish w/scotch-brite)that is WELDING not brazing. Brazing is done with BRASS.
    Respectfully,
    LG
    Although you are correct- that is welding (the coat hanger), brazing is using any material that melts at or above 840 degrees and the metal your brazing isn't melted into the brazing material, but bonds into it. Silver, brass, copper and a mixture of compounds including phosphorus, nickle etc.- not just brass.

    A very strong brazing material is 15% silver alloy we use in refrigeration. I have used it well on all metals- a white flux will allow it's use on exhaust pipe and it melts at 1,400 degrees.

    I brazed this piece of exhaust onto this steel plate for the air cleaner bracket. It will not fail if done correctly.


    79 CJ5
    258, 2barrel BBD, 2.5" lift, 31 x 10.5's, T18a w/Dana 20,
    30 front, AMC 20 rear.....
    cigarette lighter that doesn't work.

  10. #10
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    Icon91

    Very nice !!
    Respectfully,
    LG

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