What is the best head gasket sealer additive? I have seen some that are $40 a bottle, and some that were $3. I know the best thing to do is to replace the head gasket. I am not sure if one of my head gaskets is leaking. I think there might be a small one-way leak that only allows combustion gasses into the coolant, but doesn't allow coolant to pass into the cylinder. If the additive fixes my problem, I will know the gasket needs to be replaced. If it doesn't then it probably doesn't have a bad head gasket and I will have to find another solution.
What are the negatives of using a head gasket sealer? Can some of the metallic additives react with the other metals (aluminum and iron) in the engine to cause some type of galvanic corrosion?
What are the negatives of using a head gasket sealer? Can some of the metallic additives react with the other metals (aluminum and iron) in the engine to cause some type of galvanic corrosion?
Last edited: