Does your engine need a valve adjustment? It depends on the age, condition and brand of vehicle you’re driving. Due to the popularization of roller-follower valve train designs that reduce friction ...

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.

At the end of the day, an internal combustion engine is just an air pump. Proper airflow in and out of the engine is thus critical to efficiency and power. The valves atop (sometimes on the side) of ...

Time was when a valve job was done with some valve-grinding compound and a vacuum cup on a stick. But no more. Today's high performance engines require the same machining precision in the valves that ...