Welding cast manifold???
05-11-2011, 06:09 PM
#21
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I've been reading up on this myself lately. Several guys from the forced induction forum have done it and there's some good threads on it in there. Here's one that went to 4 pages. https://ls1tech.com/forums/forced-in...manifolds.html
05-12-2011, 04:16 PM
#22
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I have welded broken manifolds by grinding a v grove then take an nickle arc welding rod, remove the flux coating, hit with a hammer and then use the rod as filler for a tig weld.
05-25-2011, 10:28 PM
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The two other guys that said use nickel rod are right. In maintenance that's what we use to weld cast elbows and tee to mild steel pipe with some preheat. The nickel will flow into the cracks that are left behind from the welding arc and heat driving out the carbon in the cast. Everything else will crack under pressure and stress.
05-26-2011, 07:56 AM
#24
Still going! Thanks for the reply..
So far, I've tried the following:
All tig. Weld w/ mild steel, no preheat. Heard it "snap", see no cracks.
Then, preheated, same mild weld. No cooling "snap".
Then welded a scrap to a junk manifold. No preheat. Snap. No cracks seen. I broke the scrap piece off w/ a pliers. The weld let go on the scrap part. Manifold held.
Did the silicone bronze and scrap weld, preheated. Looks good, and the scrap is not budging!
I may just go w/ the silicone, pre/post heat/cool, and call it "nice"!
Getting a set of headers to fit w/ an LSX in a 55 is a PITA!
So far, I've tried the following:
All tig. Weld w/ mild steel, no preheat. Heard it "snap", see no cracks.
Then, preheated, same mild weld. No cooling "snap".
Then welded a scrap to a junk manifold. No preheat. Snap. No cracks seen. I broke the scrap piece off w/ a pliers. The weld let go on the scrap part. Manifold held.
Did the silicone bronze and scrap weld, preheated. Looks good, and the scrap is not budging!
I may just go w/ the silicone, pre/post heat/cool, and call it "nice"!
Getting a set of headers to fit w/ an LSX in a 55 is a PITA!
