Exhaust Manifold gaskets?
Thread Starter
Le Mans Master
Joined: Sep 2000
Posts: 7,353
Likes: 2
From: Katy TX
CI 3-4-8 Veteran
St. Jude Donor '07-'09-'12
Exhaust Manifold gaskets?
I just called my nearest Chevy dealer and he told me there arent any gaskets, its just metal to metal, is this true? If so, they are going on tonight! :D Then I will have many :cheers: These are for my car, 79 L-82. Got the old headers off, will post pics if anyone wants to come pic them up, old Headmans I believe some small repairable holes in them.
[Modified by VetteBoy1979, 12:04 PM 2/1/2002]
[Modified by VetteBoy1979, 12:04 PM 2/1/2002]
Thread Starter
Le Mans Master
Joined: Sep 2000
Posts: 7,353
Likes: 2
From: Katy TX
CI 3-4-8 Veteran
St. Jude Donor '07-'09-'12
Re: Exhaust Manifold gaskets? (78dave)
I just called another dealer and he said that they were originally done from the factory metal-metal. I asked him if I should use gaskets and he said it depends on the shape of the manifolds. I told him they were brand new and he said to put them metal to metal. Guess you learn something new everyday.
Burning Brakes
Joined: Jan 2000
Posts: 997
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From: Columbus, IN USA
Re: Exhaust Manifold gaskets? (VetteBoy1979)
The original exhaust manifolds for many years did not come from the factory with gaskets, yes metal to metal.
But in my case when ever I take manifolds off I do put gaskets in due to scaling on the surface and imperfections.
If you are going to headers definitely use a good quality set of gaskets and bolts.
But in my case when ever I take manifolds off I do put gaskets in due to scaling on the surface and imperfections.
If you are going to headers definitely use a good quality set of gaskets and bolts.
Thread Starter
Le Mans Master
Joined: Sep 2000
Posts: 7,353
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From: Katy TX
CI 3-4-8 Veteran
St. Jude Donor '07-'09-'12
Re: Exhaust Manifold gaskets? (BLT-71)
FYI, Im going from header to manifolds. I was thinking that if I just cleaned the block surface well I should be ok going metal to metal, right? :confused:
Race Director
Joined: Apr 1999
Posts: 15,133
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From: NM
Re: Exhaust Manifold gaskets? (VetteBoy1979)
FYI, Im going from header to manifolds. I was thinking that if I just cleaned the block surface well I should be ok going metal to metal, right? :confused:
tom...
[Modified by Tom73, 12:58 PM 2/1/2002]
Le Mans Master
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Re: Exhaust Manifold gaskets? (VetteBoy1979)
I was advised by several people to just use a small amount of hi-temp silicon sealer, if it made me feel better. :)
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St. Jude Donor '09
Re: Exhaust Manifold gaskets? (killain)
I removed the headers from my '70 and was informed here that since '67 or so GM didn't use any gaskets. When I put the new ram horns on I didn't use a gasket....sealed good. Just torque them to the proper specs. 20-25ft# I think---but check on that. I also used the SS bolts.
I also remove the manifolds on my '89 sub's 350 and viola----no gasket there either. Put the metal to the metal :jester
I also remove the manifolds on my '89 sub's 350 and viola----no gasket there either. Put the metal to the metal :jester
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St. Jude Donor '08-'09-'10-'11-'12
Re: Exhaust Manifold gaskets? (VetteBoy1979)
No, they did'nt come with gaskets "originally". I DO KNOW for a fact once you have used them you cannot go away from them unless you remove the head and manifolds and have them "machined down"(if you had the metal type "Victor" gaskets). Seems they leave a rough and bumpy surface when "uninstalling" them. Tried removing them on my '68 last year and it sounded practically like I had open headers!!! Ended up putting a new set of gaskets back on!!! :yesnod:
Le Mans Master
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From: Hoosier
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Re: Exhaust Manifold gaskets? (Paul Borowski)
If you have any sealing doubts...You can ink the manifold surface, and "rub" it around the block a bit. File off any shiny spots(which would be high) on the manifold. You probably don't need to do that, but just in case... :)
