Why Do Brake Discs Make Abnormal Noises?
1 Answers
The main reasons for abnormal noises from brake discs are as follows: 1. New car causing abnormal noises: Many new cars experience brake noises, which is quite normal because new brake pads and discs need to break in. Sometimes, they may emit slight friction sounds, which usually disappear on their own after driving for a while—no need to worry. 2. Foreign objects between the disc and pad: The most common cause of brake noise is the presence of foreign objects between the brake pad and disc, such as sand or small stones, which can produce a hissing sound when braking, often quite harsh. Usually, the sand or stones will be gone after some time, or you can try slamming the brakes a few times. 3. Rainy day causing abnormal noises: Rainy weather can also lead to brake noises. If the car has been parked for several days, the brake disc and pad may stick together due to rust, possibly making a loud bang when starting again. This is also normal—no need to worry. Pressing the brakes a few times will remove the rust from the disc. Another scenario is a low-speed whining sound when braking, possibly due to water in the brake disc or dampness in the brake pad and disc. The noise will stop once the water dries. 4. Not replacing brake discs in time: Brake discs have a limited lifespan. After prolonged friction, grooves may form on the disc, causing abnormal noises when the brake pad rubs against the groove edges. If the grooves are not too deep, smoothing the edges can solve the noise issue. However, if the grooves are already deep, it's advisable to replace the discs promptly.
