I'm work'n on an exhaust, and I have to remove a small block that's part of an emissions setup. The emissions is no longer going to be used on this vehicle. From what I can see it's about a 2" block.
Without removing and installing a completely new exhaust setup, I have 2 options, I can make a filler pipe, or I can weld closed the block and drill out the center.
The block in question has a butterfly mechanism in it that opens and closes to let exhaust gases out only at a certain point. It has a rod coming out of it that's attached to a vacuum canister up higher on the engine. The block is right after the manifolds, but before the catalatyc converter (sp?)
The block appears to be cast, it has the same rusty burnt look the manifolds have, plus coming right off the manifolds, it needs to be able to stand up to some heat, right?
If I choose to go to a filler pipe, would 1/4" wall thickness be enough to stand up to the heat coming out the manifolds?
If I choose to weld closed the hole where the rod is hooked up, what material can I use for a filler plate?
I've never welded any cast, but from what I've read, I can do it simply with an acetylene torch, provided I preheat it cherry red, weld while it's hot, heat it again when I'm done, and then allow it to cool slowly. I also understand I would need a special welding rod.
I have access to most forms of welding at school, but I would prefer to do this at home because it would be quicker. I have access to an acetylene setup, a MIG, and a 110 flux core. I doubt the MIG or flux core could be used to weld cast from what I've read.
Can someone give me some advice here?
Mathius
Mathius,
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