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 ...

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 ...

What is the most overlooked factor—other than restrictive rules—holding modern racing engines back, preventing them from reaching their full potential? If your answer is "cylinder heads," "connecting ...