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 ...

Picking the right valvetrain for your engine can be a daunting task. Solid flat tappet, hydraulic flat tappet, solid roller, hydraulic roller; these are the choices, made even more difficult due to ...

My 2003 Volkswagen Polo has 18,000 miles and over the last 5000 miles has developed a tapping noise from what I thought was the valve gear, as it sounded a bit like a hydraulic tappet - the noise ...

It's been all the talk on internet forums, club meeting hangouts, and in enthusiast garages across the nation—the loss of zinc and other protective "barrier" chemicals in modern oil damaging ...

A lot of these cars have a life of short runs from cold and are highly prone to condensation inside the engine (sludge under the oil filler cap). As a result the hydraulic tappets can't pump up. An ...