Flange Leak

ElwoodBlues · 12-22-2014, 02:55 PM

Also check and make sure there isn't anything above that area that might be leaking on the exhaust.

37zeroZ · 12-22-2014, 06:56 PM

I recently replaced my cat-back system with an aftermarket system. When I initially installed the system, all looked good with the exception of one flange that I suspected might be problem. After firing it up, I had leaks on all fours seals after the cats. The suspected flange had more issues than the others.

I wound up redoing those flanges with better hardware and applying cooper seal to the four gaskets. All turned out great.....no leaks.

Not sure if your leaks are from the OEM system or an aftermarket system, but do replace your gasket and/or add cooper seal.

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12-22-2014, 02:55 PM	#1 (permalink)
ElwoodBlues Base Member Join Date: Jan 2014 Location: Atlanta, GA Posts: 108 Drives: 17 Nissan 370Z Rep Power: 15	Also check and make sure there isn't anything above that area that might be leaking on the exhaust.

12-22-2014, 06:56 PM	#2 (permalink)
37zeroZ Enthusiast Member Join Date: Feb 2010 Location: Dallas Posts: 346 Drives: Truck Rep Power: 14169	I recently replaced my cat-back system with an aftermarket system. When I initially installed the system, all looked good with the exception of one flange that I suspected might be problem. After firing it up, I had leaks on all fours seals after the cats. The suspected flange had more issues than the others. I wound up redoing those flanges with better hardware and applying cooper seal to the four gaskets. All turned out great.....no leaks. Not sure if your leaks are from the OEM system or an aftermarket system, but do replace your gasket and/or add cooper seal.