Thread: leaky header tubes

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you want to weld a round the collector and up the the primaries tubes were they go in to the collector i go up the sides of the tube about 3/4 and if the tubing fit up was good you can reflow the weld with a tig or torch. i weld one tube at a time with a tig and clean each weld with a wire wheel. and look at each weld most of the time i use very little filler rod some of the steel has a lot of junk in the steel sometimes i will use 347 SS filler rod or FR70s-6 steel filler . a good fit up i will fuse it with no filller rod . i like 0.060 or smaller filler rod the very last thing i do is the collector some times you can pull out the TUNGSTEN out a bit more turn the gas up if you need to get some were tigth. i use a small cup on the tig torch on headers. i hope this helps some one .i have built many set of headers