Exhaust flange is warped where connects to muffler - Pontiac G8 Forum: G8 Forums - G8Board.com
Exhaust Tech Headers, Catbacks, Mufflers, lack of mufflers

 
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post #1 of 6 (permalink) Old 04-05-2016, 07:29 AM Thread Starter
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Exhaust flange is warped where connects to muffler

I removed my mufflers to put in the rear diff and upon re-installation the exhaust flanges are warped where they connect to the muffler. Both sides exactly the same. Where the bolts go it's fine, it's in the middle where it's going to leak. Bought new gaskets too. Anybody else seen this? I guess I just have to use a die grinder to try and make it flat again. Just weird both sides are like that.

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post #2 of 6 (permalink) Old 04-06-2016, 10:53 AM Thread Starter
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Die grinder isn't working. Exhaust shop here said they use a belt sander. I'm surprised no one else has had this issue.

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post #3 of 6 (permalink) Old 04-06-2016, 11:14 AM
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Fwiw, others have reported using rtv/gasket maker with success. Might be worth the try. Exhaust it hot, but excessive back at that flange.

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post #4 of 6 (permalink) Old 04-06-2016, 11:23 AM
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I just put my solo axlebacks on yesterday and I made sure to paint those flanges with some rustoleum. Hopefully that'll prevent any major issues.

Have you tried using a torch and heating them up enough that you could hammer them flat again?

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post #5 of 6 (permalink) Old 04-14-2016, 09:57 PM
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my kooks pipes are warped to hell. i used some rtv to try and seal the gap but its still leaking slightly. ill grind them flat when i have time

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post #6 of 6 (permalink) Old 04-20-2016, 12:36 PM
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Typical when bolts get over tightened, the flanges warp. Use a hammer and a straight edge to straighten them. grinding them will make it thinner and warp easier. Get new gaskets and you should be good

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