It is possible to run solid flat tappets on a hydraulic flat-tappet cam and even mechanical roller lifters on a hydraulic-roller cam. Putting solid lifters on a hydraulic cam will gain about 500 rpm ...

Once upon a time, most car engines used solid or mechanical lifters. But unlike most fairy tales that begin that way, there was no lasting happy ending for them. Hydraulic lifters first appeared in ...

Sorry, solid lifters, you make a wonderful typewriter clack and allow for intoxicatingly high rpms, but you can't be surprised that manufacturers slowly moved to ...

Camshaft technology is continually changing. From new lobe profiles to various forms of lobe placement, each manufacturer takes its own approach to modern performance. While flat-tappet grinds remain ...

Back in 2021, a class action lawsuit was filed against General Motors over valve lifter-related issues in certain Cadillac, Chevy and GMC models outfitted with certain V8 gasoline engines. That ...

COMP Cams Explains the Pros and Cons of Solid, Hydraulic, Flat-Tappet, and Roller Cams, and the Advanced Technology that makes them all Work. With horsepower seemingly growing on trees these days, ...

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 ...

A few days ago, we published a report highlighting the valve lifter issues some General Motors customers were experiencing in certain vehicles equipped with either its 5.3L V8 L84 gasoline engine or 6 ...