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

Adjust your own valves and you become a man. When you go forth into the world, lesser souls shall part before you like the Red Sea. Women will sense your well-oiled, mechanically capable aura and ...

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 ...

Adjusting overhead valves on heavy-duty ­diesels is a routine maintenance item subject to benign neglect in many of today’s fleets. The hardware that links the camshaft to the valves and some ...