Those wound-up pieces of high-tensile steel under your rocker arms work so hard closing your valves over millions of cycles that they could probably use a replacement right about now. We're talking ...

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 ...

Everything you need to know about the small gap between valvetrain components that is essential to the health and performance ...

Many gearheads buy their cylinder heads fully assembled and don't have to sweat making sure all of the various parts are set up correctly. But for those that build their own, or that just need to swap ...

Car engines require a lot of parts working in unison to properly function. There are thousands of explosions happening every minute when your car's engine is running, hence the name "internal ...