What Causes the Click Sound When Starting the Car?
1 Answers
This sound is caused by friction between the starter pinion gear and the flywheel. It is necessary to inspect the starter one-way clutch, as damage to this component can lead to such phenomena. Below are other possible abnormal sounds and their causes when starting the car: High-pitched squealing: This kind of squeaky noise is caused by belt slippage, which could be due to insufficient tension from the tensioner pulley or the belt being stretched from prolonged use. For a normal belt and tensioner pulley, when twisting the belt by hand with slight force, the belt should not twist more than 90 degrees. If the belt can be twisted over 90 degrees with minimal effort, it indicates that the belt or tensioner pulley is loose. Ticking sound: This noise could be the sound of the engine's valve train closing. In an engine, the valve train is typically the noisiest component; this sound is produced when the intake and exhaust valves close, and it is usually audible after startup. Alternatively, it could be the sound of the spark plug firing. Metal grinding noise: This sound likely occurs because the vehicle has been parked for an extended period, causing the oil to drain into the oil pan. During the initial startup, components may not be adequately lubricated, resulting in metal grinding sounds, which should disappear once oil pressure builds up.
