What are the reasons for abnormal noise when stepping on the brake?
3 Answers
The reasons for abnormal noise when stepping on the brake are: 1. There are foreign objects such as sand between the brake pads and the brake disc, which increases the friction of the brake pads; 2. Some low-end brake pads are made of resin and metallurgical powder sintering, with particles that are too large; 3. The brake pads have a warning device. When worn to a certain extent, the metal sheet will directly rub against the brake disc, producing abnormal noise, and the brake pads need to be replaced in time. The car brake pedal is located below the steering wheel. Stepping on the brake pedal causes the brake lever linkage to be pressurized and transmitted to the brake shoes on the brake drum, clamping the brake disc, thereby slowing down or stopping the car. The principle of braking is to convert the kinetic energy of the car into heat energy and consume it, and the kinetic energy comes from the power provided by the engine, which requires fuel combustion to provide work.
As a seasoned driver with years of experience, I take brake noises very seriously. There are three main reasons for this: first, the brake pads may have worn thin, and when they reach their limit, they produce a squeaking sound as a reminder to replace them; second, the brake discs may have rusted or have dust particles stuck in the gaps, especially when starting the car for the first time after it has been parked for a long time in rainy weather; third, there may be impurities in the system, such as small stones or worn metal shavings, causing abnormal friction. Safety is paramount, and not addressing the issue immediately can damage the brake discs, leading to significantly higher repair costs and even endangering driving. Regularly cleaning the discs with a soft brush during car washes and checking the brake pad thickness every 5,000 kilometers can help prevent such issues. Remember, unusual noises are not trivial—don’t take chances by ignoring them.
As an average car owner, I was quite alarmed when I first encountered brake squealing. The reasons are actually quite straightforward: the most common cause is foreign objects like sand or rust spots on the brake pads making noise during friction; another is excessively thin pads, where increased noise occurs as they wear down against the rotor; improper installation can also frequently lead to strange sounds. For instance, after hard braking, metal expansion may temporarily cause noise. My advice is not to panic—try lightly pressing the brakes a few times to see if the noise goes away. During regular maintenance, have a technician perform a quick inspection; spending a little now can prevent major repairs later. Also, avoiding puddles while driving can help reduce the risk of rust formation.
