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Mod | | | Forums66 Topics128,042 Posts1,055,511 Members48,424 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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| | | | Joined: Jan 2002 Posts: 7 Member | | Member Joined: Jan 2002 Posts: 7 | I need to replace my exhaust manifold '66 250 c.i. I would rather just do the exhaust, and not the intake/exhaust combination. Is that possible, with the one piece gasket? Any tricks to this procedure? | | | | | Joined: Jan 2001 Posts: 662 Shop Shark | | Shop Shark Joined: Jan 2001 Posts: 662 | IMO If it is a stock setup you'll want it on the bench before you try to separate the intake and exhaust. The bolts are usually very rusty and will break if you don't heat them up with a torch first. It's all coming off to get the new gasket in, so don't make life difficult by trying to remove just the exhaust. | | | | | Joined: May 2000 Posts: 234 Shop Shark | | Shop Shark Joined: May 2000 Posts: 234 | The whole thing has to come off, the gasket slides on over the studs.
-Boyo
'48 Willys CJ-2A / '55.1 Chevy 3600 / '66 Austin-Healey 3000 / '04 Volvo wagon (parenthood!?)
| | | | | Joined: Jun 2000 Posts: 2,773 'Bolter | | 'Bolter Joined: Jun 2000 Posts: 2,773 | Like they said, you need to take them both off. Don't separate them unless you have to. Whenever I replace the manifold gaskets on the six, here's what I do to help stop the exhaust leaks.
First, clean the mating surfaces. Sand down any rust, remove the old gasket material, and finish the cleaning with a good solvent, I prefer lacquer thinner.
When ready to re-assemble, I put a coat of Permatex Ultra-Copper RTV on the manifold surfaces, then put it all back on. I have used the knock-off rtv, but the Permatex sticks better.
Fred
52 3600
69 C-10
| | | | | Joined: Feb 2001 Posts: 1,897 Member | | Member Joined: Feb 2001 Posts: 1,897 | I highly recommend having the manifold resurfaced by a competent machine shop.They will resurface the intake to exhaust if needed as well as replace broken studs/bolts(extra cost of course)
There is enough good in the worst of us and enough bad in the best of us that it does not behoove any of us to criticize the rest of us.
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Be yourself. If you are ever lost, It will be much easier to find yourself if you know who you are!
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