Quote:
Originally Posted by SeanC
The actual fitting that screws onto the header is not bottoming out and forcing the tube tight against the fitting (I dont know the technical name for this type of fitting). If I grab the metal tube, I can move it up and down a little bit....Obviously if there is a check valve to keep exhaust gases from going back to the AIR pump, then this tells me that there IS exhaust leaking out of this fitting if it is not tight. Not sure why I didn't think of this previously. I'm not completely convinced that the headers are sealing properly at the flanges, but sounds to me like the AIR fittings are definitly part of the problem...
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Yeah, the Pacesetter emission's headers I put on my old 96 SS didn't have enough threads on the AIR fittings so the stock AIR pipes wouldn't stay on tight. I put a washer on top of each fitting that was small enough to fit inside the AIR fitting and that took up the slack and still sealed it up. It's surprising they still haven't fixed this issue but they probably don't make the headers anymore and it's just leftover stock at this point.