What Causes the Squeaking Noise from a Car's Belt?
2 Answers
Car belt noise is caused by insufficient belt tension or aging of the drive belt. Below are the consequences of not replacing the belt in time: System failure: A broken engine belt can lead to failures in the car's air conditioning system, power steering system, and power generation system, resulting in the generator not working, the power steering pump not functioning, and other fault symptoms. Valve and piston damage: A broken timing belt can cause damage to the valves and pistons. The timing belt is exposed outside the engine, and over time, the belt surface will begin to age, even developing cracks. Issues like belt slippage will follow. The aging and breaking of the belt can affect the engine's valve timing, even leading to the complete failure of the valves, pistons, and crankshaft.
When I hear a squeaking noise from the car belt, several common causes immediately come to mind. The belt may have aged, becoming hardened or cracked after years of use, leading to increased friction and noise. Alternatively, the belt could be too loose due to a failing tensioner, causing it to slip and rub against the pulley. Humid weather can also make the belt slippery and produce squeaking sounds. I would recommend starting with a simple check, such as listening for changes in the noise during a cold start. If the issue is confirmed to be wear-related, applying some belt lubricant can provide temporary relief, but in the long run, the belt must be replaced to avoid more serious problems like engine overheating. For those who prefer DIY solutions, a tension gauge can be used to check if the belt tension is within the standard range—just remember to turn off the engine for safety. Regular maintenance can prevent such issues; inspecting the belt condition approximately every 50,000 kilometers is a cost-effective and hassle-free practice.
