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35 Posts
I,read many of the posts on how to adjust the hydraulic lifters and have redone mine four times. Each time one or more have been very loose. I have a 350SBC with cast bowtie heads, screw in studs & guideplates. The Comp Cams Extreme 280 cam and matching lifters came out of my buddies engine with only a few hundred miles (lifters carefully boxed and identified so they went back on the same lobe). The heads were surfaced so I used a pushrod length checker to get the correct length hardened pushrods.
Before I read the posts about roller tip rockers I purchased a set of Proform 1.6 chrome moly roller tip rockers. I'm not sure if the problems others have had are with the cast chrome moly ot the cheaper stamped rockers. I seem to have a problem similar to another guy who did not really get an answer. When the cam lobe is on the heel, I can loosen the adjusting nut a couple turns easily but once I begin to slowly tighten the nut while turning the pushrod It seems like the pushrod suddenly binds. It will not go from loose to feeling resistance. If I back off the nut a fraction of a turn the pushrod will again turn freely. I can't seem to get the lifters adjusted without a little clacking.
My question is are the rockers the problem, could the pushrod ball ends be a little large? Or could the groved balls not be fitting properly in the rocker body. Any ideas ? I'd prefer to not adjust with the engine running. And I don't want to go to tall valve covers so full roller rockers are out of the question. Thanks
Before I read the posts about roller tip rockers I purchased a set of Proform 1.6 chrome moly roller tip rockers. I'm not sure if the problems others have had are with the cast chrome moly ot the cheaper stamped rockers. I seem to have a problem similar to another guy who did not really get an answer. When the cam lobe is on the heel, I can loosen the adjusting nut a couple turns easily but once I begin to slowly tighten the nut while turning the pushrod It seems like the pushrod suddenly binds. It will not go from loose to feeling resistance. If I back off the nut a fraction of a turn the pushrod will again turn freely. I can't seem to get the lifters adjusted without a little clacking.
My question is are the rockers the problem, could the pushrod ball ends be a little large? Or could the groved balls not be fitting properly in the rocker body. Any ideas ? I'd prefer to not adjust with the engine running. And I don't want to go to tall valve covers so full roller rockers are out of the question. Thanks