Spark knock or detonation, is a type of ignition what produced by the accumulation of too much warmth and burden in the engine’s burning chamber. When this occurs, you should be capable to listen a metallic pinging or knocking sound. A small amount of explosion can be a cause of the problem and usually will not reason major harm, but heavy prolonged explosion or knocks can cause thoughtful injury to your portions. It can hit holes in the car pistons, blow head gaskets, crush rod bearings, crack rings, and pound out piston ring grooves. Prolonged pinging sounds are a certain cause for anxiety.