The EGR in a diesel engine plays a significant role in your vehicle's overall performance, but what is it exactly? Here's everything you need to know.

Time was when a valve job was done with some valve-grinding compound and a vacuum cup on a stick. But no more. Today's high performance engines require the same machining precision in the valves that ...

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 ...

In basic terms, valve timing is crucial for determining engine performance, and newer valvetrain systems are much more precise at controlling valves when the engine is revving closer to redline.

In this article, we will talk about getting valve clearance adjustments. We will start with explaining how your engine works, then get to the valves themselves, talk about the frequency of the ...

The inlet and exhaust valve timing of a piston engine plays a large role in engine performance. Many modern automotive engines have some sort of variable valve timing, but the valves are still ...

Don't know the difference between single overhead cam, dual overhead cam and overhead valve engines? We've got you ...

The Buick Division of General Motors never had it so good. After hammering at the door of the “Big Three” for 17 years, the door suddenly opened and even Buick personnel were amazed to find that their ...

The 12-valve 5.9-liter Cummins I-6 engine was developed and installed in Dodge pickups starting in 1989, creating one of the most legendary partnerships in automobile history.

Got a check engine light and it's returning a code for a faulty PCV valve? Swap it out yourself by checking out our top picks of the best PCV valves.