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There is rust on all ignition coils and some started to form at the top of the new ignition coils. There is a tiny bit of rust in 2-3 of the spark plug wells. I cleaned the rubber rings for the ignition coils and the 4 rings of the valve cover where they sit. Do you think that will work? I’m assuming water is in there since there is rust. I’m confused as to how water is getting in there. Is it possible that the valve cover gasket needs to be replaced?