Why are 4 valves per cylinder better than 2 valves per cylinder? Is DOHC better than OHV? 4 valves per cylinder allows for more airflow than 2 valves per cylinder, as there is larger open area when ...

This is a category that is pretty rapidly going away. You'll be hard-pressed to find an overhead valve — also known as a pushrod — engine in anything outside of a General Motors LS/LT V8 or one of ...

It means that the valves, which open and close to let the air-fuel mixture in and out of the cylinders, are above the camshaft, which is in the engine block. The camshaft activates pushrods that move ...

The internal combustion engine, despite being a century-and-a-half old, is still an impressive marvel of engineering. There are several variations of engine design that have been experimented with ...

Tick. Tick. Tick. That's the sound our Ford 4.0-liter, over-head valve (OHV) engine was making in our 1991 Ford Explorer after 250,000 miles. The Ford 4.0L V-6 engines, built in Germany, are found in ...

View post: Toyota Vs. Tesla At 250,000 Miles: It’s Not Even Close Spurred on by Joel’s post on pushrod engines and some of the comments that it generated, I think it’s time to take a closer look at ...