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 ...

We may receive a commission on purchases made from links. While browsing auto repair and maintenance tools at your local parts store, you've likely come across compression testers like the Orion Motor ...

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, ...