Spark plugs that haven't been changed for a long time can become one with the cylinder head. Fortunately, it's possible to repair damaged threads instead of scrapping the head. (Photograph by Chris ...

A spark plug thread chaser isn't always the answer, but it can make a big difference when you're installing fresh new plugs.

It doesn't matter what type of vehicle you drive or which type of spark plug you're using. If your car has an internal combustion gasoline engine, it has the potential to eject a spark plug — although ...

Few things disturb us more than the bewilderment of a broken bolt or seized pipe plug in a casting. You’re at a loss for how to get the darned thing out. This is when you have to slow down and come up ...

A motorcycle that refuses to start on a busy morning can ruin more than just your schedule, if you press the starter, the engine cranks, maybe sputters and then falls silent. For most commuter and ...