A common issue with the 5.3 engine is AFM lifter failure. In this video, we diagnose the problem and replace the failed AFM ...

From the archives: The beauty of hydraulic lifters is that they self-compensate for valvetrain clearances, doing away with the need for valvetrain adjustment. To celebrate HOT ROD's 75th anniversary, ...

General Motors has launched a new Customer Satisfaction Program to address an issue with the 6.2L V8 engine equipped by certain units of the 2023 GMC Sierra 1500 and 2023 GMC Yukon. Affected units may ...

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 ...

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 Chrysler Hemi family is generally considered to be one of the more dependable American-built powerplant lines. Not to say Chrysler has never produced a dud, but, by and large, the brand is ...

When General Motors launched Active Fuel Management (AFM) and then, Dynamic Fuel Management (DFM), the idea was that the fuel consumption of truck and SUV owners could be improved by turning off ...