This is a category that is pretty rapidly going away. You'll be hard-pressed to find an overhead valve — also known as a pushrod — engine in anything outside of a General Motors LS/LT V8 or one of ...

It seems, for the modern American production car. that the 'L' head engine is a thing of the past. Present design trends indicate that the few remaining flathead engines now in production will be ...

General Motors’ all-new 3.9L V6 has been honored with a Breakthrough Technology award by Popular Mechanics for its innovative use of variable valve timing in an overhead valve engine. For ages GM has ...

Rocker arms are an essential part of overhead valve engines. But how essential is it to keep track of whether they're made out of steel or aluminum?

CP-20H and CP-30H centrifugal pumps feature capacities of 158 and 264 gpm, and a maximum head of 98 and 115 feet, respectively. Overhead valve engines provide peak performance and minimal fuel ...