Sway bars ensure that your vehicle doesn't tilt, roll, or sway excessively while cornering. Here's what you need to know.

Symptoms of a failing tensioner usually start with lots of squealing. See our guide to tightening or replacing belt tensioners.

See our complete guide to hemi engines, including hemi engine design, history, and which new cars with hemi engines you can buy today.

Ignition interlock devices provide an option for drivers whose licenses have been restricted due to DUI. It requires a breath sample.

The positive crankcase ventilation (PCV) valve keeps the inside of your engine clean. Discover how it works and when to replace it.

The EGR valve opens and closes to allow controlled recirculation of exhaust gasses into the engine. Here's what you need to know.

The difference in compression between each cylinder should be within 10 percent. Here's how to test engine compression. It's easy.

Dirty wheels and tires can destroy the look of a gorgeous vehicle. Fortunately, it's easy to restore a wheel to like-new condition.

With a push of the button on a remote fob, your heating system brings the cabin up to a pre-set temperature or cools things down.