On the m20 and m40, there is a ring gasket between the cat & catback sections of the exhaust.
On the M42, it is a press/pressure fit, w/o gasket, between the cat & catback. I cannot get this PITA to stop leaking. It sounds like shit at anything above 75% throttle.
I have already tried loosening the Trans-to-DP bracket to realign the flanges so they're straight, then tightened the spring-loaded hardware till it has just little bit of spring left. But now rather than the top leaking, it's the bottom.
I am seriously considering just welding up conventional flanges so I can use a gasket. Anyone?? I believe there is enough movement in the muffler hangers that I don't have to worry about overstressing anything. And I have the Trans-to-DP bracket that i'm willing to bet the majority of M42 cars are missing, so I have little worry about the mani cracking.
On the M42, it is a press/pressure fit, w/o gasket, between the cat & catback. I cannot get this PITA to stop leaking. It sounds like shit at anything above 75% throttle.
I have already tried loosening the Trans-to-DP bracket to realign the flanges so they're straight, then tightened the spring-loaded hardware till it has just little bit of spring left. But now rather than the top leaking, it's the bottom.
I am seriously considering just welding up conventional flanges so I can use a gasket. Anyone?? I believe there is enough movement in the muffler hangers that I don't have to worry about overstressing anything. And I have the Trans-to-DP bracket that i'm willing to bet the majority of M42 cars are missing, so I have little worry about the mani cracking.
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