What do you guys think of using anti-seize compound on engine parts? (external) Around the mines where I have worked for the last many years anti-seize was just generally accepted as a must use for heavy equipment and I have never seen it cause a problem with fasteners coming loose so I have always used it for most any exposed nut or bolt except for something that required a thread locker compound. The reason I am asking is that about 2 years ago I replaced a water pump on an older Ford 302 and the bolts were a bear to remove (as is usually the case on these older Ford engines) with one breaking so to prevent future problems I cleaned the hole threads with a tap, used all new grade 8 bolts, high temp anti-seize and then torqued to spec. The problem is now two years later the car came back with a mysterious water leak that the owner could not find, turns out the bolts holding the water pump/timing cover had loosened and was leaking at the timing cover/block junction. Since usually these bolts are a problem to loosen and I have never even heard of them working loose I think it is obviously the anti-seize, but why? I have done several water pumps in this manner along with numerous other parts but now I am having second thoughts on the wisdom of doing this, any opinions?