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 ...

Rotary engines (also known as Wankel engines and Wankel rotary engines) are quite different from piston or "reciprocating" engines. One of the distinguishing features is that they don't need valves to ...

Since the 1950s, some motorcycles, notably ones from Ducati, have used desmodromic valvetrains in their engines. Why is this ...

Desmodromic valvetrains allow for higher revs without needing to worry about valve float. So why do automakers not often use them outside of motorcycles?

Have you ever heard of the Silent Knight? It was a unique engine that ditched noisy valves for a weirder, quieter, and more ...

The Buick Division of General Motors never had it so good. After hammering at the door of the “Big Three” for 17 years, the door suddenly opened and even Buick personnel were amazed to find that their ...