mbe

i'm not sure if you are having the same prob like i had, initially i tought the lifters were noisy too. since they are self adjustable there's nothing much i can do bout it, i did add additives and changed some parts here & there but it didn't help. it was later i found out that noise actually came from a warped manifold, got it replaced and problem solved. i would sugggest you listen carefully 1st before you replace the lifters.