What Are the Abnormal Noises in a Car Engine System?

[DelLilliana]

Here are the abnormal noises in a car engine system: High-frequency squealing: If the car emits a high-pitched squealing noise during cold starts that persists for a while, it is caused by the drive belt slipping or thinning edges. Metal clanking: If there is a metal clanking sound from the engine direction after starting, it is due to incomplete combustion of the air-fuel mixture in the combustion chamber. This is caused by using low-grade or substandard gasoline, resulting in abnormal noises. Tapping sound: If a tapping sound is heard from the engine direction during acceleration, which is not loud but continuous, it is caused by insufficient engine oil or prolonged neglect of oil filter replacement, leading to uneven valve clearance.