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TR2/3/3A TR-3A cracked exhaust manifold
- Thread starter n2stom
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Geo Hahn
Yoda
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Looks like you're not getting anyone who has tried this so I'll pass along a comment from a respected source that was on the archives of another forum...
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Manifolds are tough to properly weld. Here's why:
1) The metal is cast and heating it will make it tend to warp, thus the fit after the weld is iffy.
2) Two different metals (the manifold, and the Welding rod) are hard to get to stick together with any degree of permanence. As the engine warms up the two metals heat up at different rates. This causes one to expand more than the other and try to come apart.
=======================================================
Manifolds are tough to properly weld. Here's why:
1) The metal is cast and heating it will make it tend to warp, thus the fit after the weld is iffy.
2) Two different metals (the manifold, and the Welding rod) are hard to get to stick together with any degree of permanence. As the engine warms up the two metals heat up at different rates. This causes one to expand more than the other and try to come apart.
Simon TR4a
Jedi Knight
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I would second Geo's comment; there are new welding sticks for welding cast iron, but I have heard this is a not a reliable solution.
(I am not a welder, so I am passing on second-hand information here.)
You might find a used one or look into a header from Moss or elsewhere.
Simon.
(I am not a welder, so I am passing on second-hand information here.)
You might find a used one or look into a header from Moss or elsewhere.
Simon.
Thr trick to welding exh manifolds is to use a nickle welding rod. Any good welder can do this. The thing to do is find something solid you can bolt to. You secure the item and let it cool in place. All that said, I wouldn't think tr3 manifolds are that hard to find and getting a good one is a whole lot easier.
G
Guest
Guest
Guest
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Absolutely, JBWeld is a no go. I had the exhaust manifold and the head welded on my TR3 some years ago and they held well. IMHO, it all depends on the skill level of the welder. What have you got to lose?
Bill
Bill