What Causes the Squealing Sound When Braking?
2 Answers
The causes of squealing sound when braking are: 1. Worn or aged brake pads; 2. Foreign objects in the brake pads; 3. Brake pads in the break-in period; 4. Carbonization and crystallization of brake pads. The solutions for squealing sound when braking are: 1. Replace the brake pads; 2. Remove foreign objects from the brake pads; 3. Polish the edges of the brake pads; 4. Apply butter or specialized lubricant at the connection between the brake pads and calipers. The working principle of braking relies on friction, utilizing the friction between the brake pads and discs, as well as between the tires and the ground, to convert the kinetic energy of the moving vehicle into thermal energy through friction, thereby stopping the vehicle.
I've driven many cars before, and screeching brakes are quite common. The most frequent cause is brake pads worn too thin, or the wear indicator is already signaling you—in such cases, the friction produces a particularly loud noise, like scraping. Additionally, if you drive in dusty or dirty areas, small stones or sand might get stuck between the brake disc and pads, causing noise when rubbing. Another reason could be rust or scratches on the brake disc, especially noticeable after the car has been parked in humid weather for a long time before starting. Don't underestimate these sounds—they can affect braking performance, increase stopping distance, and be dangerous during emergency braking. I recommend that if you hear any unusual noises, don't delay; get to a professional repair shop as soon as possible for inspection, replacing new parts or cleaning to prevent accidents. Safety first.
