Last month's "How It Works" story gave you the basics of the four-stroke cycle, describing the motion of the intake and exhaust valves in relation to the piston moving up and down in the cylinder.

There was once a time when Desmodromic valve technology was cutting edge and a necessary competitive advantage for Ducati in racing. The Desmo head doesn't use a valve spring to return the valve to ...

At Circle Track, we're all about helping you do more for yourself. But sometimes that's just not realistic. That's not casting doubts on the intelligence of our readership. Just like your mom, we ...

Brian Cooley is CNET's Editor at large and has been with the brand since 1995. He currently focuses on electrification of vehicles but also follows the big trends in smart home, digital healthcare, 5G ...

When we turn the key, what happens under the hood and why? How does an automobile engine work? What is that sound we hear and the propulsion we feel when the accelerator is depressed? "External ...

The letters VVEL are important to the architecture of Nissan engines. Those four letters stand for Variable Valve Event and Lift. What that refers to is a Nissan engine that operates without the use ...

The choke valve in an engine's carburetor, whether it's a Holley carburetor or another brand, helps a cold engine start by restricting some of the airflow into it. When the engine is cold, the choke ...

General Motors is well known for its small-block V8 engines; especially the powerful, reliable, and versatile LS series that debuted with the C5 Corvette in 1997. Unlike most of its rivals, GM decided ...

During the 1980s, Maserati experimented with a clever, 36-valve V6 gasoline engine, but for various reasons, the idea never ...