A healthy engine is a precision piece of machinery. When its tolerances are within spec, seals are tight, spark is ample, and components are well-oiled, it's reliable and operating with utmost ...

The purpose of your engine is to compress fuel and air and then ignite it, creating heat energy that then makes mechanical motion. If your engine can't compress the air and fuel properly, the engine ...

You might talk about it often, but do you really know what compression is all about? Every engine has to make it and those that don't are hurtin' for sure. But, here's the confusing part, for this ...

A hand holding a compression tester that's attached to an engine cylinder. - Aleksandr Kondratov/Getty Images A healthy engine is a precision piece of machinery. When its tolerances are within spec, ...