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 ...

The Chevrolet Corvette is the last true sports car to use a pushrod V8, and you might not think that's a good thing. After all, overhead-cam engines have been the standard for decades at this point, ...

If you're into wrenching, you might have heard of roller and flat tappet cams, but what's the difference between the two, and ...

Did you know that the Pontiac Firebird had an overhead cam engine? No, the Lotus designed LT5 with those exotic dual overhead cams from the Corvette ZR-1 never nestled under the screaming chicken ...

Jeep's overhead-cam six, famously called the Tornado, was one of the first mass-produced overhead-cam engines built in the United States after World War II. As whiz-bang as that sounds, the engine ...

Last month's "How It Works" story gave you the basics of the four-stroke cycle, describing the motion of the intake and exhaust valves in relation to the piston moving up and down in the cylinder.