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 "battle of the camshaft lifters" has been going on for years. Each design has its proponents. Those in favor of hydraulic cams cite reduced maintenance and claim that equivalently ground ...

"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 ...

The Vacuworx HL Series Hydraulic Lifters are designed to improve safety, boost productivity and reduce operating expenses when moving and installing concrete road barriers up to 30 ft (9 m) long and ...

Small-block Chevys first came out of Detroit with hydraulic-roller camshafts in 1987 in some passenger cars. Because the small-block was first on the scene, this story will deal with just the ...

Noisy tappets (also known as hydraulic lifters) are relatively common on engines that have done their fair share of work. By using oil pressure generated from the engine’s oil pump, the hydraulic ...