Jonny Posted July 21, 2018 Share Posted July 21, 2018 Hi there, I am rebuilding the top end of my GSX1230 engine. It currently has a cometic gasket that most people on 'tinterweb say is reusable. Most of the comments I have read say they go on dry when new but when reusing should be sprayed with 'Copper coat' sealant, as the sealant coating comes off. This seems to be an American product. What do you guys in the UK use? Thanks, Jon Quote Link to comment
arnout Posted July 21, 2018 Share Posted July 21, 2018 What kind of Cometic (head?) gasket are you using? Cometic sell a multitude of types but for the GS(X)1100 engine I believe they only offer a copper and graphite version. Quote Link to comment
Arttu Posted July 22, 2018 Share Posted July 22, 2018 Cometic makes also MLS gaskets for the GSX. Copper gaskets are definitely re-usable. Officially MLS gaskets shouldn't be re-used but I know that people are doing that a lot with good success. Graphite / fiber gaskets definitely aren't re-usable. I haven't personally tried re-using a MLS gasket, yet. I think it would be a good idea to use some kind sealant in that case and copper spray sealants seem to be a popular choice. VHT is one popular choice but like you said it's difficult to get in Europe. Permatex makes similar product (Copper Spray-A-Gasket) that has been used succesfully as well. Should be much easier to source. Quote Link to comment
Leblowski Posted July 22, 2018 Share Posted July 22, 2018 (edited) I reused non copper cometic headgaskets more then once on boosted engines I always clean em up and give them a thin layer of copper spray. Just dont go mad with spraying to thick. untill today i never had re used a headgasket that failed. Edited July 22, 2018 by Leblowski 1 Quote Link to comment
Jonny Posted July 22, 2018 Author Share Posted July 22, 2018 16 hours ago, arnout said: What kind of Cometic (head?) gasket are you using? Cometic sell a multitude of types but for the GS(X)1100 engine I believe they only offer a copper and graphite version. Its the MLS gasket. You can get them new for about £45. The copper versions seem to be about £60 but I haven't seen them in 77mm size. Quote Link to comment
Jonny Posted July 22, 2018 Author Share Posted July 22, 2018 4 hours ago, Arttu said: Permatex makes similar product (Copper Spray-A-Gasket) that has been used succesfully as well. Should be much easier to source. Thanks Arttu. I saw that online when searching but wasn't sure if it was the right stuff. I might give it a go. Quote Link to comment
coombehouse Posted July 22, 2018 Share Posted July 22, 2018 I have used aerosol hylomar which works ok & is easier to find & much cheaper. 1 Quote Link to comment
clivegto Posted July 23, 2018 Share Posted July 23, 2018 Have used rattle can primer on steel head gaskets with no problem. Quote Link to comment
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