You've heard that pistons have rings, but have you ever wondered why there are three? Here's how piston rings work together to keep your engine running.

Taking an engine compression test is sort of like checking your car's blood pressure. It's a quick and painless procedure ...

Determining the compression ratio of an automobile engine is no easy task. It'snotdone by glancing at the "13:1" that's printed on the piston box. Instead it involves the use of a formula that ...

The folks at TRW have come up with a revolutionary idea for reducing the piston ring drag of the top compression ring. It is called the Pressure Balance Ring (PBR). Essentially, the PBR design amounts ...

For how basic it is, a car engine's four cycles of combustion are truly fascinating. A perfectly timed valvetrain ensures that the air/fuel mixture enters, compresses, and then exits without piston-to ...