The internal combustion engine, despite being a century-and-a-half old, is still an impressive marvel of engineering. There are several variations of engine design that have been experimented with ...

Camshafts are simple devices, but important ones. Modern engines can have one or more intake and exhaust valves, and it's the camshaft's job to open valves precisely as the engine runs, supplying the ...

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 ...

Add Yahoo as a preferred source to see more of our stories on Google. Camshafts are simple devices, but important ones. Modern engines can have one or more intake and exhaust valves, and it's the ...

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 abbreviations DOHC, SOHC, and OHV usually refer to different types of car engines. A particular setup mostly depends on the type and age of your vehicle − be it a vintage car dating back to the ...

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 ...

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 ...

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 ...