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 ...

Cam lift and timing can put the valves dangerously close to the piston. We show you how to check the clearance In all but most the mild engine builds, taking extra time to check piston to valve ...

At the height of the muscle car craze, the engineering wizards at Oldsmobile created a "Frankensteinesque" big-block V8 with four valves per cylinder that could've become the most iconic American high ...