I'm wondering if anyone knows of a good epoxy that can be used inside a header? I know people have used it to raise the floor of the exhaust ports. I'm just worried about expansion/contraction and the epoxy coming off and going through the turbo. Will it be okay? What kind/brand should I use if at all?
A little more info on what I'm actually trying to do:
I'm in the process of building turbo headers for my 3.0l van. I am making log headers out of 1-1/2" schedule 40 pipe(which just so happens to be the perfect size to match the 3.0l exhaust ports). I only have access to basic tools. Angle grinder die grinder flux core welder. The headers are made from 90* weld els and schedule 40 straight pipe. I have one completed minus the flanges and I'm pretty happy with that one. On the second one I have two runners done but I decided to try a slightly different way of cutting and it didn't work out as well. I had a gap to weld and on the inside the gap is evident. I would like to smooth it out if possible but I don't think I can make a good weld on the inside to add enough metal. Which is why I'm considering epoxy. I would hate for a piece of epoxy to break loose at some point and destroy the turbo so I am posting here in hopes that someone has tried it before. If not I will use my die grinder to get it as smooth as possible and run it. The gap is not horrible. It's just not as smooth as I would like it to be. I'm probably being too anal. With the radiator I'm using I don't have enough space to make tubular headers which is the main reason why I chose to make the log headers. I think using 90* els welded to the straight pipe will flow better than using tees so that's the route I'm taking.
Thanks
Joe,