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#1 |
Registered User
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Location: Mansfield, TX
Posts: 147
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Question from a non wrench turner
Ok, guys, question. I have always but some sort of gasket and seal on surfaces between components. Whether it is carb, valve covers, water pump etc. What about between the exhaust manifold and the block? Searched and have seen both yes and no. On both questions, gaskets and sealer. The exhaust manifolds are new Dormans. Obviously the block is original. I know there have been statements regarding having all ground flat/smooth. That really isn't an option at this point. So what should I do? Use the copper sealant and gaskets? Sealant and no gaskets? No sealant and gaskets?
Thanks guys!!! ![]() ![]()
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__________________ Rob '72 Chevy C-10 - 350-5.7/TH350/PS/PB/AC Build Thread - http://67-72chevytrucks.com/vboard/s...87#post5503187 Semper Fi and Gig'em Aggies! |
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#2 |
Registered User
Join Date: May 2012
Location: Raleigh, NC
Posts: 639
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Re: Question from a non wrench turner
Are you talking about header gaskets? If so I've always only used only gaskets and no sealant.
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1970 Chevy C-10 Stepside My build thread: http://67-72chevytrucks.com/vboard/s...d.php?t=528167 ![]() |
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#3 |
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Location: Mansfield, TX
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Re: Question from a non wrench turner
Between the exhaust manifold and the head. Seen many say one way or the other and trying to find a consensus. If one can be found! :-)
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__________________ Rob '72 Chevy C-10 - 350-5.7/TH350/PS/PB/AC Build Thread - http://67-72chevytrucks.com/vboard/s...87#post5503187 Semper Fi and Gig'em Aggies! |
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#4 |
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Join Date: May 2012
Location: Raleigh, NC
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Re: Question from a non wrench turner
yep, header gaskets. I've always only used the gasket. Others here may have other views though!
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1970 Chevy C-10 Stepside My build thread: http://67-72chevytrucks.com/vboard/s...d.php?t=528167 ![]() |
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#5 |
Registered User
Join Date: Jun 2010
Location: Upland Ca
Posts: 4,143
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Re: Question from a non wrench turner
As you have seen, a consensus can not be found. Here's my opinion, with fresh surfaces on both the heads and manifold, no gasket no sealer. With questionable surfaces on the head, manifold, or both I would use a gasket, no sealer.
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1972 C10 SWB, Air, PS, PB, 350/350THM. Second owner. 1965 Corvette roadster, 44K miles, 327/365 SHP, 4 speed, side exhaust, knockoffs, teak, second owner (bought in 1970), Have ALL numbers matching components. My frame off restoration thread: http://67-72chevytrucks.com/vboard/s...d.php?t=556703 |
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#6 |
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Join Date: Aug 2012
Location: Ringgold GA
Posts: 149
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Re: Question from a non wrench turner
I would go with gaskets and no sealer. I've never even heard of not using gaskets.
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67 C10 swb bored out 350 granny 4 speed I come from a long line of moonshiners |
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#7 |
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Join Date: May 2012
Location: Raleigh, NC
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Re: Question from a non wrench turner
likewise.. even from the factory
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1970 Chevy C-10 Stepside My build thread: http://67-72chevytrucks.com/vboard/s...d.php?t=528167 ![]() |
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#8 |
Registered User
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Location: Mansfield, TX
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Re: Question from a non wrench turner
Thanks guys! I'll go with just the gaskets and no sealant.
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__________________ Rob '72 Chevy C-10 - 350-5.7/TH350/PS/PB/AC Build Thread - http://67-72chevytrucks.com/vboard/s...87#post5503187 Semper Fi and Gig'em Aggies! |
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#9 |
Account Suspended
Join Date: Jan 2007
Location: Tucson
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Re: Question from a non wrench turner
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#10 |
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Join Date: Oct 2010
Location: Kansas City
Posts: 3,590
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Re: Question from a non wrench turner
As long as the surface of the block and the manifold are clear, no gasket. They didn't have them from the factory. If you do put a gasket in there, it's likely to just burn up and create leaks.
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Willie Swamp Angel Truckers '72 C10 Highlander ![]() People who blindly follow a GPS end up on television programs on The Weather Channel. Some survive, some don't. ![]() |
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#11 |
Hittin E-Z Street on Mud Tires
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Location: Greenville, SC
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Re: Question from a non wrench turner
Interesting... NEVER heard of not using a gasket until now...
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Jesse James 1967 C10 SWB Stepside: 350/700R4/3.73 1965 Ford Mustang: 289/T5-5spd/3.25 Trac-Loc 1968 Pontiac Firebird: Project Fire Chicken! 2015 Silverado Double Cab 5.3L Z71 2001 Jeep Wrangler Sport 4.0L 5spd 2020 Chevrolet Equinox Premium 2.0L Turbo 2011 Mustang V6 ~ Wife's ride ![]() American Born, Country by the Grace of God ![]() 1967 CST Shop Truck Rebuild! My 1967 C-10 Build Thread My Vintage Air A/C Install Project "On a Dime" Trying my hand at Home Renovation! 1965 Mustang Modifications! |
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#12 |
Registered User
Join Date: Aug 2012
Location: Ringgold GA
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Re: Question from a non wrench turner
I've been inside quiet a few motors and never found one without gaskets. My grandpaw who is a retired mechanic (in business 1945-1998) said he never saw one without gaskets either.
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67 C10 swb bored out 350 granny 4 speed I come from a long line of moonshiners |
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#13 |
Registered User
Join Date: Jun 2010
Location: Upland Ca
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Re: Question from a non wrench turner
Willie is correct, none from the factory.
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1972 C10 SWB, Air, PS, PB, 350/350THM. Second owner. 1965 Corvette roadster, 44K miles, 327/365 SHP, 4 speed, side exhaust, knockoffs, teak, second owner (bought in 1970), Have ALL numbers matching components. My frame off restoration thread: http://67-72chevytrucks.com/vboard/s...d.php?t=556703 |
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#14 |
Senior Member
Join Date: May 2003
Location: ne florida
Posts: 2,665
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Re: Question from a non wrench turner
on the older engines i've never used gaskets because i've found that most of them are flush mounts.[no gaskets] but on headers yes use gaskets. use to use two before they came out with the new self sealing gaskets for headers. never had a problem with them worked great.
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#15 |
Registered User
Join Date: Mar 2009
Location: independence mo
Posts: 2,111
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Re: Question from a non wrench turner
No gaskets, That just goes to show you're never too old to learn something new.
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I'm not as good as I once was, But I'm as good once as I ever was. |
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#16 |
Senior Member
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Location: Cedar Park, Texas
Posts: 7,496
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Re: Question from a non wrench turner
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#17 |
Registered User
Join Date: Jan 2012
Location: flagler beach,florida
Posts: 176
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Re: Question from a non wrench turner
chevrolet factory tech here.later model stuff(90s up regular sbc)no gaskets.earlier stuff had gaskets.if the head surface is machined,which the later heads are(vortec style most crate motors from chevy)your ok no gaskets.the earlier heads were not so well machined so the factory used gaskets.most sanderson manifolds do not recomend gaskets.depends on the surface quality of the manifold and heads.
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#18 |
Roto Reuter thats the name...
![]() Join Date: Feb 2010
Location: Darien, NY
Posts: 1,853
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Re: Question from a non wrench turner
My Dougs headers installation instructions said to use their gasket along with a light film of Permatex Ultra Copper High Temperature Sealant.
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~ Dan ![]() My 70 K10 SWB build:http://67-72chevytrucks.com/vboard/s...d.php?t=782232 My 71 SWB build:http://67-72chevytrucks.com/vboard/s...d.php?t=651394 1970 SWB Fleet K10 4X4, 5.3L LM7, 4L60E, Dakota Digital RTX, Vintage Air, Ididit tilt 1971 SWB Fleet C10 - Original SWB Arizona truck, new custom restoration project "Kick out your motor and drive while you're still alive - kick it out!" - Heart 1977 |
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#19 |
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![]() Join Date: Jul 2012
Location: Mansfield, TX
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Re: Question from a non wrench turner
Thanks for all the info guys! I got them installed last night. Decided to go without gaskets and see what the results are. Both surfaces are clean and straight so I think it should be ok. Let her run for about 30 minutes last night and didn't notice/find any leaks.
Thanks again for everyone's advice!!!
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__________________ Rob '72 Chevy C-10 - 350-5.7/TH350/PS/PB/AC Build Thread - http://67-72chevytrucks.com/vboard/s...87#post5503187 Semper Fi and Gig'em Aggies! |
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#20 | |
Registered User
Join Date: Jun 2010
Location: Upland Ca
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Re: Question from a non wrench turner
Quote:
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1972 C10 SWB, Air, PS, PB, 350/350THM. Second owner. 1965 Corvette roadster, 44K miles, 327/365 SHP, 4 speed, side exhaust, knockoffs, teak, second owner (bought in 1970), Have ALL numbers matching components. My frame off restoration thread: http://67-72chevytrucks.com/vboard/s...d.php?t=556703 |
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#21 |
Registered User
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Re: Question from a non wrench turner
Thanks Lee! Thought I probably would have to do that with the expansion/contraction.
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__________________ Rob '72 Chevy C-10 - 350-5.7/TH350/PS/PB/AC Build Thread - http://67-72chevytrucks.com/vboard/s...87#post5503187 Semper Fi and Gig'em Aggies! |
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#22 | |
Cruzin
Join Date: Dec 2009
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Re: Question from a non wrench turner
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