Why is there abnormal noise after replacing new brake pads?
2 Answers
The reasons for abnormal noise after replacing new brake pads are: 1. The old brake disc was not polished when installing the new brake pads, resulting in improper fit; 2. The brake system itself has defects, causing the brake pads to only partially contact the brake disc, which increases the pressure per unit area during braking and leads to abnormal noise. It is recommended to check components such as the caliper and guide pins. Brake pads are generally composed of a steel plate, a bonded heat insulation layer, and a friction block. The steel plate is coated to prevent rust, and the coating process is monitored with an SMT4 oven temperature tracker to ensure the temperature distribution during coating meets quality standards. The heat insulation layer is made of non-heat-conducting materials to provide thermal insulation.
It's quite normal for new brake pads to squeak in the first few days after replacement, my car does the same. The surface of new brake pads is extremely smooth, and there might be some initial mismatch when contacting the worn brake disc, just like new shoes rubbing your feet - it'll smooth out after a few hundred kilometers. During this period, it's best to avoid sudden braking and drive smoothly to let them gradually break in. Last time I specifically observed that new brake pads still have burrs on the edges, and the noise disappears once these burrs wear down. If your brake disc has slight rust or some oil contamination, it can also cause friction sounds. Remember not to rush into disassembly unless the noise is particularly harsh or persists after a month, which might indicate improper installation or quality issues with the brake pads.
