Exhaust Flange Fun

superwasp

So, I thought I'd see what you all have in your bag-o-tricks for getting exhaust flange gaskets to actually seal. I'm fighting with one on the exhaust downpipe on a 308. After cleaning up both mating surfaces with sandpaper, I've tried a new gasket, tried coating it with anti-seize, and various torque amounts (I've yet to actually find a specific torque spec on these). I'm curious what others have done to get these things to seat.

tbeilke

The muffler shop I use recommends the Remflex 31-001 gasket to seal stubborn problems.   The gasket isn't cheap, but it works well.

superwasp

Hmm. It looks like that is that part number is for the manifold to block. PN 8014 looks like a 2" universal for the manifold to down-pipe. 

BigSky

I would consider using permatex Optimum on both sides of the gasket if you continue to have trouble.  I used the Ultra (lower temp) on exhaust manifold gaskets per Doug Wildrick’s recommendation with great success.

superwasp

Cool. Thanks! It's certainly worth a shot. 

superwasp

The Permatex solution seems to have worked. It takes forever to fully cure, but seems to be worth the few bucks and dry time. ?