84YotaBuck

Just looking to verify if the exhaust manifold on a 84 22r is Cast Iron, found a nice big crack in mine today where the 4 turn into 1 and contemplating welding it up, but I know welding cast iron can be a pain.

DeathCougar

iTrader: (23)

Yes.

It is cast iron.

84YotaBuck

K, Thanks, hopefully that welding class I took will come in handy since we talked about welding cast iron. I'll pre-heat it by running the engine and weld it up then!

84YotaBuck

Welded it up, was a good size crack. Pre-heated by running the engine, welded it up, then peened it for a while as it cooled, then closed the hood to retain some of the heat and let it cool for an hour or so, seems to be good.

JamesD

There is more to it than that when welding cast iron: http://www.lincolnelectric.com/knowl...ronpreheat.asp

James

camo31_10.50

not much more...bought the only difference is keeping it warm, letting it cool down slowly.

i think he'll be perfectly fine lol

Nice Job!!!

TinMan

A note for the next time you need to weld up a crack, especially in cast iron. Find the very ends of the crack, and drill a hole at the very ends of the crack. Does not have to be a very big hole. A crack cannot jump a hole. If you did not, even if your weld was good, it will most likely continue the crack later. Then grind it out, and weld it up with a stick welder, 6011, or flux core.

Good work, Later