Re: 390 making noise
a dud lifter or cam will definetly make lots of noise! if the valve not opening as far as it should it could be dud lifter or dead lobe for sure. checking for wich one is the fun part on the fe motor! first take the rocker shaft off and check it is ok, then compare the push rod from that valve with the other push rods to make sure it is ok, if that is all good you will need to remove all pushrods and intake manifold to remove the lifter and replace it if its no good. check the base (cam end) of the offending lifter to see if it has worn concave, if so the cam will be no good either. any probs just contact me. cheers.