Welding exhaust manifolds
I am in the middle of a rebuild of my AMC 390 and I just noticed a crack in one of the bosses where the bolt goes for the exhaust manifold. Does anybody have any advice for welding something like this? I have a MIG welder and O/A torches and I am a reasonably competent welder around the garage, but I have not tried my hand at welding cast yet. I have the Finch welding book and I read the section on welding cast iron...sounds like he recommends preheating it in an oven and then brazing it with the torch. What say ye?