woodward Posted April 23, 2022 Report Share Posted April 23, 2022 Hi, I'm about to put the head back on my rebuilt engine and plan to use a composite gasket (the black one with the read stripe on it) because I've upgraded to 89mm pistons. Last time I took the head off I used a payen gasket and sealed it with Copper Coat which worked very well. My question is whether I can also use this copper coat on the composite gasket aswell? Alternatives would be wellseal, hylomar (I have this in spray form) or none at all. What is the advice on copper coat...? Thanks Myles Quote Link to post Share on other sites
Ian Vincent Posted April 23, 2022 Report Share Posted April 23, 2022 If the gasket is the Racetorations one, then I’m pretty sure no additional sealant is required. Rgds Ian Quote Link to post Share on other sites
woodward Posted April 23, 2022 Author Report Share Posted April 23, 2022 Thanks Ian - the gasket came from TRGB. Could they be the same…? Myles Quote Link to post Share on other sites
brenda Posted April 23, 2022 Report Share Posted April 23, 2022 No sealant on my gasket my was from Racetorations, Mike redrose group Quote Link to post Share on other sites
Hamish Posted April 23, 2022 Report Share Posted April 23, 2022 I don’t think you add sealant on the composites I think the red bead on them is the sealant. Quote Link to post Share on other sites
Andy Moltu Posted April 23, 2022 Report Share Posted April 23, 2022 The composite gaskets have a lacquer coating to make the seal. Some also have a bead of sealant material on the gasket. Either way no need to use additional sealant on the composite gaskets. However there may be a case for a bead of silicone on the area of the gasket outside of the pushrods which isn't well compressed by the head studs, especially after minor warping over the years. Not important for sealingthe bores or water jacket but minimises the annoying oil leaks on that side of the engine. (This can be done on the 6 pots too) Copper gaskets are a different matter! Quote Link to post Share on other sites
Nigel Triumph Posted April 23, 2022 Report Share Posted April 23, 2022 37 minutes ago, Andy Moltu said: The composite gaskets have a lacquer coating to make the seal. Some also have a bead of sealant material on the gasket. Either way no need to use additional sealant on the composite gaskets. However there may be a case for a bead of silicone on the area of the gasket outside of the pushrods which isn't well compressed by the head studs, especially after minor warping over the years. Not important for sealingthe bores or water jacket but minimises the annoying oil leaks on that side of the engine. (This can be done on the 6 pots too) Copper gaskets are a different matter! +1 Sealant around the push rod tube side of the head to make certain it's oil tight. Other than that, composite gaskets don't need sealing compounds. Nigel Quote Link to post Share on other sites
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.