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.

A small gap with big importance in the performance and health of an engine - here's everything you need to know.

A federal judge has sent 17 plaintiffs in a class action lawsuit against GM to arbitration. The plaintiffs were part of a class action lawsuit against GM that alleges a malfunction in the automaker’s ...

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, ...

You've probably read this line a dozen times: "It's never been easier to make horsepower than right now." While that's true, it also means everything else in the engine is now more highly stressed.

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 ...

Drag racers have been searching for tricks to gain horsepower since day one, and there are lots of ways to do it without spending a tremendous amount of time or money. One of the biggest downfalls of ...