2eighTZ4me Posted September 18, 2014 Share Posted September 18, 2014 So - just got my new MLS Cometic gasket - they have a 'dry' recommendation for installing on their instruction card, but I can't help but think that a coat of copper spray is going to hurt anything. Any of you care to chime in to the contrary? And, if so, why? Quote Link to comment Share on other sites More sharing options...
nullbound Posted September 18, 2014 Share Posted September 18, 2014 They are recommended dry, but I've heard of them leaking when installed dry if the machined surfaces aren't exactly right. The quick fix in those cases is using a new cometic gasket with copper spray. I know of plenty of builds where a light coat was used on new gaskets with no issues. Certainly seems like added insurance. Quote Link to comment Share on other sites More sharing options...
2eighTZ4me Posted September 18, 2014 Author Share Posted September 18, 2014 Hey Ryan - yeah - I've done it in the 'past' 2x with the old gasket - but never had the installation card, so I didn't know they recommended a dry install. My surfaces are completely within spec - head went to the machine shop and cleaned/straight edged and deemed worthy by my machinist, so I can't help but think that this is just added insurance. Thank you sir! Quote Link to comment Share on other sites More sharing options...
dapiper Posted October 27, 2014 Share Posted October 27, 2014 Where did you get that Cometic MLS? thought they couldn't make due to lack of volume sales. What is bore? How much $? Heard Kaminari makes one but 89mm bore. Quote Link to comment Share on other sites More sharing options...
2eighTZ4me Posted October 28, 2014 Author Share Posted October 28, 2014 Top End Performance in California. It is an 89mm bore - and you can have them make you one in any thickness you want. Think it was $218 shipped to my door. Quote Link to comment Share on other sites More sharing options...
godzeerah Posted November 1, 2014 Share Posted November 1, 2014 The copper spray is fantastic on any head gasket. It's not a matter of "sealing" the gasket. The copper's specific heat is lower than carbon steel, so most of your heat from the head will be transfered AROUND the gasket and not through it, making your gasket's heat capacity much higher....spray the crap out of it is what I say. Quote Link to comment Share on other sites More sharing options...
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