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 ...

Affected 5.7-liter Hemis suffer from poor lubrication at low RPMs. So, if you do a lot of idling in your truck, if you do a ...

Jeff Blitz purchased his '66 Chevy II Nova four years ago, complete with a carbureted 10.5:1 355ci small-block Chevy, a TH350 automatic with a 3,000-rpm stall-speed converter, a 3.55:1 12-bolt rearend ...

Upgrading your engine from a flat-tappet valvetrain to roller comes with a lot of advantages—mainly more power and radically reducing the chances of wiping a camshaft lobe—but it also requires a few ...

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 ...