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

Judge denies motion to sever GM lifter lawsuit, keeping AFM and DFM claims together after four-year delay. Plaintiffs face an ...

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 ...

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 ...

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 ...

We've all heard the term "There's no replacement for displacement" more often than we care to recall, and when comparing big and small engines with similar induction methods, the clich typically holds ...

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 ...