A small gap with big importance in the performance and health of an engine - here's everything you need to know.

While making our usual rounds of race shops, we came across a problem that plagues many racers and unnecessarily costs them lots of money-and we thought we'd share the solution with you. While ...

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 ...

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 ...

The valvespring is the curse of the overhead-valve, pushrod V-8. Racers and savvy enthusiasts have long been conscious of the effects of valvesprings going away. Take a cruise through the pits of any ...