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Exhaust manifold question

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Old Nov 19, 2002 | 08:46 PM
  #1  
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Default Exhaust manifold question

On the 1981 and 1982 Vettes, they came with a tubular exhaust header.

Did Chevrolet put a exhaust gasket between the header and the cylinder head during assembly?

I know you don't need exhaust gaskets with the cast iron manifolds, but what about these tube types? I know aftermarket headers leak big time if you don't use gaskets, and these are pretty close in design.

Just wondering what GM did......

Thanks.
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Old Nov 19, 2002 | 08:54 PM
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Default Re: Exhaust manifold question (BSeery)

I have headers on my 74 with no gaskets for 3 years with no leaks. I just used high temp silcone sealent. I dont believe that 80-81 had tube headers, but some one else will have to tell you for sure.
Ed
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Old Nov 27, 2002 | 03:10 AM
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Default Re: Exhaust manifold question (ED DINAPOLI)

anyone else ???
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Old Dec 29, 2002 | 05:55 PM
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Default Re: Exhaust manifold question (BSeery)

TTT
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Old Dec 29, 2002 | 07:55 PM
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Default Re: Exhaust manifold question (BSeery)

Hey, BSeery, I'm kinda surprised one of the authoritative voices (ie: JohnZ or SWCDuke) hasn't stepped up to the bat on this one.

I thought the factory headers used metal gaskets to prevent leaks as the exhaust flange isn't as sturdy as to good ol' ram horns but I've never had one of that vintage.

Desertdawg, what does your car have? It's original, isn't it???
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Old Dec 29, 2002 | 08:07 PM
  #6  
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Default Re: Exhaust manifold question (Mac)


Desertdawg, what does your car have? It's original, isn't it???
He says that he can't see any, but has never taken it apart either.
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Old Dec 30, 2002 | 12:56 AM
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Default Re: Exhaust manifold question (Mac)

Come on, Mac, he's asking a question about an '81 model.

Don't you guys know that my knowledge of Corvettes doesn't go beyond drum brakes and AFB carburetors. ;)

To the thread originator: Joe Lucia can answer your question, but he doesn't hang out here anymore. Try the tech board at http://www.ncrs.org

Duke

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Old Dec 30, 2002 | 02:16 AM
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Default Re: Exhaust manifold question (SWCDuke)

This topic is kind of mute now, BSerry has gone ahead and bought a set of Hedman headers for his Vette. and he put a set of cast manifolds on his old chev pickup instead.

But we are still curious to see if the 82 factory headers are supposed to have gaskets or not.

Anyone? Bueller?
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Old Dec 30, 2002 | 09:55 PM
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Default Re: Exhaust manifold question (BSeery)

According to the NCRS judging guide (80-82), "No gasket is used between the exhaust manifold and the cylinder head."


[Modified by gq82, 9:56 PM 12/30/2002]
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Old Dec 30, 2002 | 11:56 PM
  #10  
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Default Re: Exhaust manifold question (gq82)

According to the NCRS judging guide (80-82), "No gasket is used between the exhaust manifold and the cylinder head."
Thanks GQ82... :cheers:

Thats what we were looking for... :cool:
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Old Dec 30, 2002 | 11:56 PM
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Default Re: Exhaust manifold question (gq82)

According to the NCRS judging guide (80-82), "No gasket is used between the exhaust manifold and the cylinder head."


[Modified by gq82, 9:56 PM 12/30/2002]
Thank you !!
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