The engines of yesteryear were pretty simple, with tappets clackity-clacking away on cam lobes, opening valves, and making a ruckus while doing it. Mechanical lifters were adequate for valve operation ...

The rules in some racing classes restrict competitors to running hydraulic valve lifters. Cheaters have been known to run hydraulic lifters on a mechanical (solid) cam profile. Solid cam profiles ...

"Bullwinkle, that trick never works. Why don't you figure out how to make hydraulic roller lifters survive big spring pressure." Like Bullwinkle, hydraulic roller lifters get no respect. It appears ...

Before the implementation of hydraulic lifters to keep the engine's valves in proper working order, regular adjustment was required to maintain the critically necessary clearance in the valvetrain.

I have a dealer repair bill for $3,751 for replacing 12 hydraulic valve lifters in the six-cylinder, 200-cubic-inch engine in my 1966 Ford Mustang. The dealer's shop people insist that the head was ...

Add Yahoo as a preferred source to see more of our stories on Google. The engines of yesteryear were pretty simple, with tappets clackity-clacking away on cam lobes, opening valves, and making a ...