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post #1 of (permalink) Old 01-07-2002, 11:01 AM
85Jeepny
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Exhaust Welding ?

I'm converting to a 4.0L and the exhaust manifold is cracked. (from 96 GC) My friend is excellent welder, I haven't asked him, but what would you use to weld up the crack until I buy a header?

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post #2 of (permalink) Old 01-07-2002, 11:41 AM
 
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Re: Exhaust Welding ?

I've seen people weld them but it doesn't last.

78 CJ7 304V8,TH400,Dana 300 Twin stick,Custom HD-WT AMC20 detroit locker 4:10,D30 ez-locker 4:10,Built NOT Bought.
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post #3 of (permalink) Old 01-07-2002, 12:00 PM
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Re: Exhaust Welding ?

i've seen them welded and they do last though too. i dont know with what, but if you are getting headers, i guess the quick fix isnt as crucial long term.

Hall

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post #4 of (permalink) Old 01-07-2002, 04:19 PM
 
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Re: Exhaust Welding ?

would be more permanant to braze it, if oxy/acet is available ( assuming its cast) f it isnt cast weld it away..

also, JB weld will hold it for a while if it isnt in a stress part ( like a bolt hole area) clean the crapola out o fit with a wire brush, then brake cleaner, after the cleaner has evaporated goop that stuffon there, wait 24 hours ( or what package says ) before running it.

I had it hold for several months on an old FORD 302.



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post #5 of (permalink) Old 01-07-2002, 07:10 PM
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Re: Exhaust Welding ?

i've had great success with a nickel rod made by lincoln can't remember the # off hand but i've welded a few manifolds and its holding well on all. mine(304) was welding all the broke studs at the donut gasket,all air injection holes(or what ever they were for), and a crack down the front 2 years and still going. i'd groove the crack some then use a good cleaner that evaporates clean.

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post #6 of (permalink) Old 01-07-2002, 09:16 PM
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Re: Exhaust Welding ?

delete this hole thing if i'm wrong- this is stainless?
a good tig welder can fix this and tack on a small gusset
to help the expansion probs. it aint expensive. i'll do it.





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empty the magazine.
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