What Causes Abnormal Noises in Car Braking?
2 Answers
Car brake noises are caused by the use of low-quality or overly hard brake pads, as well as sand or foreign objects between the brake pads and brake discs. Use of low-quality or overly hard brake pads: When brake pads rub against the brake discs, they produce a squeaking sound. Therefore, it is essential to use high-quality brake pads when replacing them. The abnormal noise will gradually disappear as the brake pads and discs wear in, and braking performance will improve without requiring any special treatment. However, it is advisable to avoid hard braking, as this can accelerate wear on the brake pads and discs, affecting their long-term durability. Sand or foreign objects between the brake pads and brake discs: During normal driving, it is inevitable to encounter rough road conditions. Due to the unique design of disc brakes, sand or foreign objects may get lodged between the brake pads and discs, causing abnormal noises when braking. Try pressing the brakes hard a few times to help dislodge the particles. Brake pad installation issues: After installing the brake pads, the calipers need to be properly adjusted. If the brake pads are installed too tightly, reversed, or improperly fitted, they can cause abnormal noises. Reinstalling the brake pads or applying grease or specialized lubricant to the connection between the brake pads and calipers can resolve the issue.
As a veteran driver with over 20 years of experience, let me tell you there are several common causes for brake squealing. First is when brake pads wear down to the warning tabs - the metal scraping against the rotor makes that distinctive squeal to remind you it's replacement time, which is extremely common. Second is when sand or small stones get embedded in the rotor surface, creating a gritty grinding noise, especially likely after rain or driving on dirty roads. Newly replaced brake pads need bedding-in, so some noise during the first few hundred kilometers is normal. Rust on brake rotors can also cause this, particularly after car washes or prolonged parking. Additionally, lack of lubrication in caliper guide pins or poor retraction may cause jerky sensations when braking. My advice: when hearing unusual noises, first identify their characteristics. If accompanied by longer braking distances, head to the repair shop immediately - safety comes first.
