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 ...

At the end of the day, an internal combustion engine is just an air pump. Proper airflow in and out of the engine is thus ...

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 ...

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 ...

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 ...