Would it be more likely that epoxy bonds on aluminum heads would break down quicker than say SS heads over a period of time? Or is the reason I have more loose alumimun heads than SS is because they are cheaply made? Or is it the trunk factor?
I believe that there are more epoxy failures on aluminum heads due to poor prep of the hosel interior. Aluminum forms an oxide on the surface that must be mechanically removed. Best way to do this is with a wire brush followed by acetone wipe. The material is somewhat porous and must be cleaned aggressively.
