Hi, There Are Various products on the market for sealing head gaskets, but None will work if combustion gases are entering the cooling system. If the car is overheating, or bubbling in the coolant bottle, then there is nothing that will work. You are welcome to try. Some of these products are costly too. There is one product I have used called "BLUE DEVIL" It's Costly And Timely To Install. And May not work for your problem. If you do buy it. You must follow the directions on the bottle.
Hope This Helps You,
Good Luck
Edward S.
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Saturday, August 7th, 2010 AT 4:55 AM