That rhythmic knock under the hood could mean five very different things.

We may receive a commission on purchases made from links. Car engines derive power from thousands of miniature explosions contained within their cylinders every minute. We quickly become accustomed to ...

GM has a message for owners of its V8-powered trucks and full-size SUVs: that ticking noise from the engine bay at idle requires no action. The automaker recently informed dealers that a tick, tap, or ...