What are the causes of abnormal noises in a car?

1 Answers
SanVivienne
07/30/25 1:16am
There are several reasons that may cause abnormal noises in a car: 1. Long service life of the engine: Some cars have engines that have been used for too long, and high idle speed during each startup may cause abnormal noises. 2. The engine oil used during maintenance is also a contributing factor: Expensive engine oil is not necessarily the best; it must be suitable for your car. Unsuitable engine oil can produce certain abnormal noises. 3. Belt wear: Cars with long service lives may need belt replacements, and worn belts can also produce such noises.
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