Would this work to fix a crack?

i think the name of it is JB welder? i have a crack in my front exhaust manifold would i be able to just apply this stuff? i know there is a cracked manifold topic....but i dont wanna take it off.

No

Bert

JB weld won't really work because of the heating/cooling. Coefficient of expansion is very different between that epoxy and cast iron (the manifold's material) so the epoxy tends to bust off or, if you get it bonded right, it'll cause breaking again nearby.

I imagine there might be an appropriate repair epoxy but I don't know what it is. IF I were you I would ask at a farm or industrial supply store, and if I remember right Scotty you're out in Cecil (near but not in Pittsburgh) so a counterperson or clerk in a Tractor Supply or an independent industrial supply store ought to have an answer for this one. I suspect that someone may have formulated a steel- or iron-filled epoxy that they claim works. But I'd ask someone whose livelihood depends somewhat on whether it works & you won't find such a person at a big-box discounter or home center.

Albertj

wont work. ive tried. i took my headers down to meineke and got the cracks welded up for $20....

thanks guys

and no albert im in pgh. sum1 else is in cecil

xxsupergman25xx wrote:

thanks guys

and no albert im in pgh. sum1 else is in cecil

So sorry...

BTW you might consider contacting junkyards (Leetsdale comes to mind) - should not be hard to pull good exhaust manifold(s) off a car with 3800 that is otherwise headed for hte crusher, there are a LOT of them - Buick Regal, Pontiac GP, others from the late 80s up. They will know.

Albertj

Here you go. Not sure if this is correct for your car...
https://rivperformance.editboard.com/for-sale-f22/stock-front-exhaust-manifold-t6205.htm#88041

Bert

thanks bert. but unfortunately the series one looks like this..

oo o
and series 2 looks like this
ooo

they arent interchangeable. it sux.