What Causes the Noise When Releasing the Brake?
2 Answers
There are several possible reasons for the noise when releasing the brake, as analyzed below: 1. False Fault: This noise is mainly caused by the driver releasing the brake too slowly when starting the car, which is a common issue for many automatic transmission car owners. When the brake pedal is released gradually, the engine is already driving, but since the brake is not fully released, the moving wheels are restrained by the brake system, resulting in noise. 2. True Fault: The noise can also be caused by the brake disc and brake pads sticking together due to rust. This can be fixed by applying butter or special lubricant to the connection between the brake pads and the brake calipers at a repair shop.
I've been driving for over a decade and often encounter squeaking or rattling noises when releasing the brakes. The main cause is dust, small stones, or other debris stuck on the brake pads. Daily driving, especially after rain or on wet roads, makes it easier for these contaminants to accumulate. Surface rust on the brake rotors is another common trigger, as the friction between the rust layer and brake pads produces noise. Additionally, lack of lubrication or sticking of the brake guide pins often causes noise when releasing the brakes, which can affect overall braking efficiency. Don't underestimate this issue—addressing it promptly can prevent bigger problems like accelerated brake pad wear or increased stopping distance. I recommend having a technician clean the brake system and check lubrication during each maintenance service to effectively prevent noise. Long-term neglect poses significant risks, so it's best to take action as soon as you hear the noise.
