How to deal with abnormal noise of brake pads
2. The surface of the brake disc is flat, but it sounds when the new disc is installed.
A: The first reason may be that the repairman installed the brake pads at a wrong angle. When the brake pads are removed, you can see that there are only partial friction marks on the surface of the brake pads. Handling method: Can be removed and reinstalled.
B: The second reason: At present, among domestic manufacturers, the size of the friction block of the same type of brake pad is inconsistent, especially the width of the friction block. The size deviation between manufacturers can reach up to 3 mm. This leads to the fact that although the surface of the brake disc looks smooth, if a large-sized brake pad is installed on a brake disc that has been rubbed by a small-sized brake pad, it will also sound. Treatment method: CD first, if you can drive for a period of time without the CD, the sound will not be heard after the traces match.
C: The third reason is the sudden sound after driving for a period of time. Most of this is due to the fact that there are hard objects on the road such as gravel and iron scraps caught on the brake pads when the brakes are stepped on. This situation not only sounds, but also easily damages the disk. However, when it is removed for inspection, sometimes the foreign matter has fallen off or worn away. Handling method: CD-ROM, if there are foreign objects on the film, it should be removed and then installed. In this case, the damage to the disk is often only one of the four surfaces of the two disks, which is easy to see. But if the reason is not explained to the driver, it is easy to incur a claim.
D: It sounds after driving for a while. But instead of squeaking, there is a rattling sound, which may be caused by loose attachments on the brake pads. Treatment: Retighten or replace with a new piece.
B: Product factors.
The sound mentioned here refers to the sound when the surface of the brake disc is completely smooth and flat. The reason is that the current national regulations prohibit the use of asbestos-containing brake pads, but domestic large manufacturers generally do so, while some small manufacturers are still producing and selling asbestos-containing brake pads. Although semi-metallic and asbestos-free brake pads have a long mileage and are good for environmental protection and personal health, the material is hard and asbestos brake pads are soft, so they will not make noise even if there are scratches on the brake disc, and the braking feeling is soft. If this happens, you can only replace it with a new one.
