Thread: Noisy 396 sm blk chevy-valve train

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check if heads need guide plates and do not have them on the heads ..or have guide plates and not hardened pushrods . there has been a out break of cheap guide plates out on the market that are not hard the push rods in time could cut threw them check that as well check the roller rockers are not hitting the retainers first before valve tips. i seen all of this and more . i must be dumb has i fixed other s Puck ups all the time . Oh it would not hurt to check the mild lift proper pushrod geometry