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Re: 1970 C-10 knocking sound
i would pull all the plugs out and see if they have been hit by anything ...a bolt or nut could have been in the intake or fell in while you had the intake off, right now it could be holding a valve open, also run a compression check and see whats going on...i sure hope i am wrong..but it want take a lot of time to do this , before more damage could be done..
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