a friend of mine just baught a 02 WS6, not sure what all it has done to it but i do know it has headers but the engine has 50k on it. He said the valvetrain sounds noise and a weird squeeking noise ontop of the engine, he said the valve covers look like they have been off. I thought the squeaking sounded like a spun cam bearing(unusual that would happen tho?), maybe the guy before him bent the pushrods. what do you guys think?