A knocking sound from the engine often triggers worst-case assumptions, but piston slap is a far more common—and usually less dangerous—culprit. It occurs when a piston lightly contacts the cylinder ...

The mysterious knocking sounds heard beneath the Atlantic Ocean that gave false hope that the Titan submersible and its occupants could be rescued has been revealed in a haunting new audio clip. After ...

After the underwater craft lost contact with its mothership on a journey to the Titanic wreck last summer, reports on the second day of the frantic search said that banging noises were reverberating ...

I drive a 2009 Honda Pilot Touring 4WD. I hear some knocking when I start the engine. It eventually becomes relatively quiet after a minute or two. Would it be a good idea to start using synthetic oil ...

So I was at a stop on this back road, and as I went foward and turning right, I hit a small but fairly deep pot hole. It made a nasty sound, but I didn't think of it much as I've hit pot holes before, ...