What Causes the Squeaking Sound When Driving?
3 Answers
When a car makes a squeaking sound while driving, it is most likely due to an issue with the engine belt. First, check the tightness of the engine belt. You can try pinching the drive belt with your fingers and twisting it. Note that this operation should be performed when the engine is cool. The twist angle should generally be below 90 degrees; otherwise, adjustment is needed. Below is an extended introduction to engine belts: 1. The timing belt in a car is responsible for opening the valves. If the valves open improperly, they can "hit the cylinder," causing the engine to fail instantly. Once the timing belt breaks, the engine will be immediately ruined, so it is essential to replace the timing belt regularly. Engine belts are divided into timing belts and water pump belts. Timing mechanisms can use either belts or chains. Chains are maintenance-free and do not require attention during the vehicle's lifespan, whereas belts, being rubber components, will age and need replacement. The replacement interval for belts generally ranges between 50,000 to 120,000 kilometers. 2. If the timing belt reaches the manufacturer's recommended replacement mileage, it is advisable to replace it, as a broken timing belt can cause the camshaft to damage the valves, leading to expensive repairs. The water pump belt typically needs replacement every 50,000 kilometers. If there is a squeaking sound during startup or acceleration, it is often due to insufficient tension in the water pump belt. If the belt is not severely aged, the issue can be resolved by adjusting the tension, and the belt can continue to be used. Even if the water pump belt exceeds the manufacturer's recommended mileage, it can still be used if it is not severely aged, but replacement may be necessary depending on the condition.
I once encountered a squeaking noise issue with my car, where the sound was particularly noticeable on bumpy roads or during turns, seeming to come from beneath the chassis. Upon inspection, it turned out that the ball joint in the suspension system was lacking lubrication, and long-term wear had caused friction noise. Adding some specialized grease solved the problem. Ignoring such sounds could lead to increased vibrations, and in severe cases, the ball joint might break, affecting stability and potentially causing an accident. I recommend paying attention to the rhythm of the noise while driving. If it worsens on bumpy roads, prioritize checking the suspension. Find a reliable auto repair shop to lift the car and inspect it, and consider lubricating or replacing small components to avoid costly major repairs. Simple maintenance can save a lot of hassle—safety first, after all.
I'm an auto mechanic, and squeaking noises usually indicate brake system issues. When brake pads wear down to the indicator tabs, they emit a high-pitched sound, especially noticeable during low-speed driving or light braking. Noise can also stem from dust or sand trapped in the calipers or uneven brake rotors. I've handled numerous similar cases—cleaning brake components or installing new pads typically resolves the sound. Remember to check brake pad thickness every six months; replace them if thickness falls below 3mm. Neglecting this not only damages rotors but may also lead to brake failure—a serious hazard. A simple pre-drive test can help identify issues early.
