General Motors' active fuel management system is an ingenious piece of engineering. Here's what it does, how it works, and why some hate it.

I have found that the collapsed lifter situation rarely makes any noise. In my case cylinder #6 just stopped working and the pushrod bent falling out of the lifters way. We stoipped the engine almost ...

Steve Magnante: Assuming you're discussing flat-tappet cams (and lifters) for traditional small-block (and most big-block) pushrod V8 engines, there's a nugget of truth to the idea that Mopar ...