My brother sent me a cracked iron exhaust manifold for a Mazda he wants to sell, but this has to be fixed first. Apparently they all crack, so a used part isn't available. I Magnafluxed it and found the end of the crack, i guess I will drill it and V-grind out the crack, and check it again. I only have a buzz-box, gas, and a mini-mig, so i guess it will have to be a stick weld. I have some 55% Nickle rod marked as machineable, 07235 on the container, but 16071 on the stick. It says no pre-heat required, but i was planning on sticking the manifold in the oven at 500 for a while and then bringing the temp down slow over about 8 hours or so after the weld. Any downside to that? The weld will have to go through a flange for the cat, so it will have to be milled down afterwards. My brother doesn't care if it cracks a week later, but I do. Any recommendations? BTW, I found some sticks marked "Certainium 889". Any idea what they are used for?
- posted
19 years ago