Under a tree, in a remote corner of the earth, there is a guy adjusting his hydraulic valve lash with the valve cover off and the engine running. Yes, it's true. We've seen it. Proof is that you can ...

Before the implementation of hydraulic lifters to keep the engine's valves in proper working order, regular adjustment was required to maintain the critically necessary clearance in the valvetrain.

1 Before you get started, check your pushrods for straightness by rolling them on a flat surface, and inspect the tips of the rocker arms for signs of wear or metal burrs, which will mean a short ...