I have a new GM crate motor (350/350horse), the engine comes with roller lifters and i have not owned an engine with these, needless to say the cam is a roller cam but the engine does not have roller rockers, my problem is the motor makes a lot of vavle noise (sounds like a very quite diesel) and i have had the vavles done even thou the engine has only 200 miles on it and the noise is still there, it sounds like it comes from the cam and lifter's, is this because they are roller lifter's?
Thanks for any help.