What Causes the Abnormal Noise When Releasing the Brake at Car Start?
2 Answers
Abnormal noise when releasing the brake at car start is due to damage in the brake system. The specific reasons are as follows: 1. Brake Pads: Abnormal clearance in the brake pads. 2. Brake Disc: Uneven hardness of the brake disc, affecting the uneven surface of the brake pads. 3. Braking: Release the brake once before the vehicle comes to a complete stop, then lightly apply the brake until the vehicle stops moving. 4. Engine Braking: When braking while the vehicle is in a curve, reduce the speed sufficiently through braking. However, if it's too late to slow down, the brake can be used briefly according to the situation. Emergency braking on slippery curved roads can easily cause the tail to swing out, which can be mitigated by downshifting the gearbox and utilizing engine braking to slow down.
I've been driving for half my life, and the strange noise when starting and releasing the brake often comes from rusted brake pads or dust getting stuck. Especially after rain or in humid weather, metal surfaces are prone to corrosion, producing a squeaking sound when the pedal is released. After long-term use, if the brake pads wear unevenly or lack sufficient lubrication during installation, they can also create sharp grinding noises. Driving in high-temperature environments can cause metal changes during the cooling process, which may also lead to unusual sounds. I recommend a simple self-check: press the brakes a few times to see if the noise disappears. If it persists, it's best to visit a repair shop and have a mechanic check the brake pad thickness and cleanliness to avoid affecting braking performance and creating safety hazards while driving. Regular maintenance is crucial for extending component lifespan—never underestimate these minor issues.
