The lowly pushrod has been a favorite fall guy for bad engine design. When any cam-in-block mill fails to produce adequate power, rpm, or fuel economy, how the valves are opened comes under scrutiny, ...

Correct valvetrain geometry is critical to ensure trouble-free operation of an engine, especially during high-rpm operation. When building a new engine, many people simply reuse the original pushrods ...

This may feel like specialist information, but for serious engine builders and home mechanics with a project themselves, checking the pushrod length may be a pain in the neck, but it’s worth doing.

Pushrod engines may not be as popular as they used to be, but to paraphrase the old Mark Twain misquote, "The reports of its death are greatly exaggerated." In fact, GM recently announced it was ...

The Chevrolet Corvette is the last true sports car to use a pushrod V8, and you might not think that's a good thing. After all, overhead-cam engines have been the standard for decades at this point, ...

Introduced as a successor to the venerable small block Chevy, the LS engine family had a good run. Recently replaced by the fancy, direct-injected, LT-series engine, the LS still reigns supreme in ...

One of the signature design features of traditional small- and big-block Mopar engines was the simple and effective shaft rocker arrangement. With few exceptions, these were minimalistic setups, ...

Overhead-valve internal-combustion engines, in which the valves are located in the cylinder head and actuated by a block-mounted camshaft via pushrods, go way back in automotive history. Production ...

Contemplating the advantages of the pushrod-actuated overhead valve engine design in what appears to be the twilight of internal combustion might sound as anachronistic as a quick look at the value of ...

Any gearhead worth his or her salt knows that whether it's a SOHC, DOHC, or OHV engine, the camshaft is considered the brain of a four-cycle internal combustion power plant. The camshaft's profile ...