Fittings such as these, for connecting a compressed air line to the spark plug hole for valve support, are available at most auto parts stores. Occasionally it is necessary or desirable to inspect or ...

Worldwide, Honda enthusiasts invest hundreds, if not thousands of dollars on their powerplants to extract the utmost in power and reliability. Whether they opt to keep their Honda naturally aspirated, ...

For mild street engines, stock valve springs are more than adequate. But if you've screwed in a big bumpstick for strip-banging or banzai runnin', then pay attention. Our plan was simple: Install a ...

A STUDY of the influence of vibration on valve-springs reveals two possible ways in which a valve-spring can vibrate: First, when the frequency of the forced vibration is low, the force tending to ...

Last week, we reported on the steadily growing number of 2013 Scion FR-S and Subaru BRZ owners reporting engine failures shortly after taking their cars in for a valve spring-related recall. The story ...

Katech has released a few new goodies for fifth-generation GM small blocks, including the 5.3-liter EcoTec3 L83, the 6.2-liter EcoTec3 L86, the 6.2-liter naturally aspirated LT1, and the 6.2-liter ...