A class action lawsuit filed against GM over alleged faulty lifters in certain V8 engines has still not received class action ...

Things just keep stalling, making plaintiffs and lawyers give up after years of waiting. General Motors isn't complaining.

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 ...

General Motors's Active Fuel Management (AFM) technology utilizes hydraulic valves, solenoids, and advanced software to shut down half of the cylinders in a V8 or V6 engine to save fuel. The system ...

General Motors has issued a service update for 2021 model year full-size truck and SUV models that are being shipped to dealerships and may be affected by valve lifter problems. The hazards: this ...

The Cummins 6.7L turbo diesel engine entered its fifth generation in 2019. In addition to improved output of up to 400 horsepower and 1,000 pound-feet of torque, the new engine's valve train featured ...

March 30, 2007 Over the last century of automobile development, we have seen an enormous range of valve actuation technologies, ranging from pushrod, through single then double overhead camshafts, ...

QUESTIONI'm in the process of transplanting an L77 from a 2012 Caprice 9C1 PPV [police pursuit vehicle] along with its 6L80E [six-speed, longitudinally mounted electronic automatic overdrive ...

Give them the results of a TDC valve-drop static clearance test, and Comp Cam's techs can calculate the piston-to-valve clearance for any of its cams at any degree of rotation. This is especially ...

Do you know how to choose a camshaft? This seems like a simple task because most of us understand what we want from an engine. However, propose this question to 50 Chevy fanatics and you’re bound to ...