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#1
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Exhaust Manifold Gasket
Hey, wanted to see if any uses the Permatex Hi Temp copper sealant when they are replacing the gaskets. Mine blew out on the drivers side and wanted to know if I should use it or just put the new one in without anything. Should be so much fun!!! Thanks, Marc.
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#2
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Ahem; the metal-clad material (like a Briggs& Stratton head gasket ) is thee best for strength, and thermal resistance to keep manifold(header flange heat from conducting back into the HEAD.
Cool runnings. All other methods and gaskets conduct high heat back into the heads. |
#3
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Until recently I always ran the metal FelPro gaskets with minimal issues. With my recent built I switched to Remflex gaskets. Never any sealer with either gasket type. I try to avoid it on the exhaust system.
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Ken '68 GTO - Ram Air II 464 - 236/242 roller - 9.5” TSP converter - Moser 3.55 Truetrac (build thread | walk around) '95 Comp T/A #6 M6 - bone stock (pics) |
#4
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I went for the Remflex gaskets this time around when installing the log exhaust manifolds on my 421 HO.
I trimmed every bit of excess material off so as not to interfere with the dipstick tube or my battery cable tube shield. I think it’s much cleaner looking this way.
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1964 Tempest Coupe LS3/4L70E/3.42 1964 Le Mans Convertible 421 HO/TH350/2.56 2002 WS6 Convertible LS1/4L60E/3.23 |
The Following User Says Thank You to b-man For This Useful Post: | ||
#5
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Also you should use new grade 5 bolts if your not already and don’t forget a light film of Antiseize, and even on the shank of the bolt .
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Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
The Following User Says Thank You to steve25 For This Useful Post: | ||
#6
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I replaced my exhaust gaskets many years ago when the GM metal gaskets were still available from my dealer. I ran a Permatex Hi Temp copper sealant bead around all of them as advised to do so by a master mechanic I knew. Never had an issue up to this point.
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#7
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RemFlex is the best manifold/header gasket available. Make sure to use good bolts. No sealant required ....
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1978 Trans Am Pump Gas 461 Stroker |
#8
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It's also important to make sure the surface of the exhaust manifold is flat.
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