Exhaust Manifold flange
Thread Starter
Advanced
Joined: Mar 2013
Posts: 72
Likes: 0
From: New York
Exhaust Manifold flange
Hi all,
Just wondering does a stock '81 have a gasket on the exhaust manifold flange where the manifold meets the Y pipe? I have an annoying small leak on my drivers side that I just cant seem to get rid of no matter how tight I make the flange (Nuts still move amazingly, and I certainly don't want to snap a stud). I just figured Id try changing the gasket if there is one...Although I know GM omitted using gaskets there on certain vehicles of that era..Just wondering if the 'Vette is one of them?
Just wondering does a stock '81 have a gasket on the exhaust manifold flange where the manifold meets the Y pipe? I have an annoying small leak on my drivers side that I just cant seem to get rid of no matter how tight I make the flange (Nuts still move amazingly, and I certainly don't want to snap a stud). I just figured Id try changing the gasket if there is one...Although I know GM omitted using gaskets there on certain vehicles of that era..Just wondering if the 'Vette is one of them?
Racer
Joined: Mar 2011
Posts: 480
Likes: 42
From: Los Angeles CA
Hi all,
Just wondering does a stock '81 have a gasket on the exhaust manifold flange where the manifold meets the Y pipe? I have an annoying small leak on my drivers side that I just cant seem to get rid of no matter how tight I make the flange (Nuts still move amazingly, and I certainly don't want to snap a stud). I just figured Id try changing the gasket if there is one...Although I know GM omitted using gaskets there on certain vehicles of that era..Just wondering if the 'Vette is one of them?
Just wondering does a stock '81 have a gasket on the exhaust manifold flange where the manifold meets the Y pipe? I have an annoying small leak on my drivers side that I just cant seem to get rid of no matter how tight I make the flange (Nuts still move amazingly, and I certainly don't want to snap a stud). I just figured Id try changing the gasket if there is one...Although I know GM omitted using gaskets there on certain vehicles of that era..Just wondering if the 'Vette is one of them?
Race Director
Joined: Apr 2009
Posts: 19,294
Likes: 2,754
From: Charlotte NC
Tubed exhaust manifolds of the left side that have an inverted taper....do not use a donut gasket. The pipe is flared to seal against it. If it is still leaking and you have it tight as all get out...I would bet that you have a broken flange that is welded to the exhaust manifold...that the studs are threaded into. I have encountered this numerous times.
DUB
DUB
Instructor
Joined: Aug 2010
Posts: 233
Likes: 18
From: Monrovia Md
I just took my exhaust off and there was no gasket on my 1981
