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 catasrophic can it be?
Tribune Online on MSN

8 car sounds you should never ignore

Unusual noises from a vehicle are often the first warning that something is wrong under the bonnet or beneath the car. Many drivers ignore these sounds, hoping they will disappear after a few minutes ...
The Wankel rotary engine offers one of the most unique sounds of any ICE. Most famously used in various legendary Mazdas like the RX-7 and the supposedly banned Le ...