The serpentine belt acts as a connector between the engine and its adjacent parts such as the alternator, power steering pump, and others. Mainly, during cold weather conditions, you may hear abnormal noise coming from the belt, which is due to a failed tensioner, misaligned belt or belt slippage. See this video to know why the serpentine belt of the car produces noise in cold.
https://www.mechanicsdirect.com/
https://www.mechanicsdirect.com/
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