Re: welding an exhaust manifold.

Posted by Tom Fleming on January 31, 2010 at 08:42:34 from (206.193.247.91):

In Reply to: welding an exhaust manifold. posted by robert1955 on January 31, 2010 at 08:03:59:

Welding cast iron requires that the piece be pre-heated. Then you will need to use either iron powder (if gas welding), you can braze it (brass), or you will need to use nickel rod (or wire if MIG).

When you are done, the piece will have to be slow cooled in sand. Then after cool, the weld area will have to be peened to relieve stress.

I have simplified this pretty much to illustrate if you are not setup to execute these steps, you are much better going to a weld shop that is.

If it is a standard manifold, I think you will find it reasonable to buy a new/used one. IF it is a dual-fuel one, then it might be worth repairing.

As always, IMHO.

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