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#1
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Anyone know the secret to repairing an old cast iron exhaust manifold with a crack? I have tried MIG, Oxy Acetelyne torch, etc with no luck, the stuff just will not stick. Tried it on a later model manifold with no problems. I think it may have been Nodular Iron instead of Grey Cast Iron. Is there a special prep, Acid Etch, Preheat, Welding Rod, etc, that will work? Any help would be appreciated. Cast date on the manifold is late 1968.
Paul
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70 Camaro LA Z-28 03B Citrus Green LT-1 M-40 3.73's 69 Camaro X-77 Z-28 10C Cortez Silver M-21 3.73's Deluxe Project X - SOLD 69 Camaro X-77 Z-28 01B Garnet Red w/Black top, M-20 3.73 Deluxe Houndstooth |
#2
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Paul,
That stuff is tricky, you have to heat it up, have the exact rod, coll it right and then you still never know. There used to be a guy in South Houston that did it. He was just east of South Houston Racing Heads on the south side of the street on a corner. His place looked like a dump, but what old welding shop doesn't. If that does not pan out, call Joe Akenbruck or Chris over at Owen's Racing Engines in Pearland, he should be able to hook you up. Their tele is: 281.485.5257. I basically grew up over there. ---------------------- Chris 1967 Yenko Stinger YS-199 Southeast of Disorder
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Chris 1966 Yenko Stinger YS-070 1967 Yenko Stinger YS-199 1969 Yenko Stinger YS-320 Southeast of Disorder |
#3
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OK, Thanks.
Paul
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70 Camaro LA Z-28 03B Citrus Green LT-1 M-40 3.73's 69 Camaro X-77 Z-28 10C Cortez Silver M-21 3.73's Deluxe Project X - SOLD 69 Camaro X-77 Z-28 01B Garnet Red w/Black top, M-20 3.73 Deluxe Houndstooth |
#4
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Jerry MacNeish has a guy that repairs his, I just had to have one for my Z repaired last year at the cost of $250. Call Jerry at 410-781-0418
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#5
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I've welded a few with nickel that worked. If you do that they will need painting or some other coating. How big is the crack?
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Martin Foltz 68 Camaro SS-396 L35/M20, Corvette Bronze, black vinyl top George Olsen Chevrolet San Francisco |
#6
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Crack is about 3/4" long on the inside bend of small block 527 manifold. With the spark plug shields in place it is not visible. I ground a nice v groove and removed most of the cracked material, then brazed it with a fluxed bronze alloy rod and it turned out quite nice after blending. I plan on blasting the manifold and painting with a high heat coating.
Any idea on where to get the best manifold coating? Thanks, Paul Paul
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70 Camaro LA Z-28 03B Citrus Green LT-1 M-40 3.73's 69 Camaro X-77 Z-28 10C Cortez Silver M-21 3.73's Deluxe Project X - SOLD 69 Camaro X-77 Z-28 01B Garnet Red w/Black top, M-20 3.73 Deluxe Houndstooth |
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