Dave1647545494 Posted November 14, 2003 Report Share Posted November 14, 2003 to get the compression ratio I want when I put my motor back together I have to use a .020 head gasket. this gasket is availiable in copper and steel. the steel gasket is much cheaper in price. is there anything special about a copper head gasket or does it just cost more cause its copper. Quote Link to comment Share on other sites More sharing options...
Doug1647545489 Posted November 14, 2003 Report Share Posted November 14, 2003 If I'm thinking correctly or maybe importly but for copper hg generally you have to get the block oringed ($$$$) and for a metal you have to get the block and heads surface machined prefectly to seal. Don't know if its any different for a domestic. There maybe another type of copper hg too??? Quote Link to comment Share on other sites More sharing options...
rl Posted November 14, 2003 Report Share Posted November 14, 2003 I'd use a MLS head gasket for sure. With a copper head gasket you have to use a hylomar sealer, and even then seepage can be an issue. You don't have to o-ring the block with a copper HG, however re-torquing the head bolts frequently is not a bad idea. When you have the block and heads machined, check with Cometic and see what they recommend the RA to be (the roughness of the metal) and have the machine shop machine the mating surfaces to that RA. Rob Quote Link to comment Share on other sites More sharing options...
Doug1647545489 Posted November 14, 2003 Report Share Posted November 14, 2003 Originally posted by rl: I'd use a MLS head gasket for sure. With a copper head gasket you have to use a hylomar sealer, and even then seepage can be an issue. You don't have to o-ring the block with a copper HG, however re-torquing the head bolts frequently is not a bad idea. When you have the block and heads machined, check with Cometic and see what they recommend the RA to be (the roughness of the metal) and have the machine shop machine the mating surfaces to that RA. Rob I must be thinking of a different type of copper hg. Quote Link to comment Share on other sites More sharing options...
Dave1647545494 Posted November 15, 2003 Author Report Share Posted November 15, 2003 I'm really just wondering if one seals better than the other. or if one is stronger than the other. Quote Link to comment Share on other sites More sharing options...
Doug1647545489 Posted November 15, 2003 Report Share Posted November 15, 2003 metal does both of those better Quote Link to comment Share on other sites More sharing options...
Dave1647545494 Posted November 15, 2003 Author Report Share Posted November 15, 2003 both of the gaskets are metal. one is a steel shim (metal face) the other one is copper. neither gasket is composite or layered Quote Link to comment Share on other sites More sharing options...
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