You probably know how your vehicle sounds when it's running properly. Listening to your car can help you troubleshoot problems. If you hear a strange sound, pay attention and react accordingly.
You hear a high-pitched squeal that stops when you shut off your engine: Readjust or replace the belt. These belts should have about half an inch of play and shouldn't be frayed, cracked, or glazed on the underside.
You hear a continuous high-pitched sound that may continue after the engine's shut off: Check the radiator pressure cap. The rubber gasket may be worn.
Something ticks rhythmically while your engine idles: Shut off the engine, wait ten minutes for the engine to cool and the oil to settle, and then check the oil level. If you have enough oil, have a mechanic check the valve adjustment.
If you hear a loud tapping or knocking sound in your engine, pull to the side of the road and call for road service. The source may be a loose rocker arm or carbon buildup inside the engine, but if it's a loose bearing or a faulty piston, it can destroy the engine.
Mild knocking or "pinging" may be the result of using fuel





