Add Yahoo as a preferred source to see more of our stories on Google. Engine knock is the sharp, metallic sound that cuts through the hum of a healthy engine. At its core, engine knock is a problem of ...

If you hear a knocking sound from the bowels of your engine, it could be rod knock, but what exactly is it, and just how ...

A lot of people were celebrating when white smoke over the Vatican meant there was a new pope in town -– and that included plenty of gearheads with great ideas about what the new guy should use as his ...

Millions of drivers are paying extra for premium gas and getting absolutely nothing back.