1. After removing the original car film and replacing it with a new one, it makes a noise.
At present, according to the actual situation, the probability of the original car's brake pads scratching the original car's brake discs is over 50%. However, firstly, it is the original car parts, and secondly, it is only scratches that do not make a sound. Therefore, 90% of repair shops and drivers do not believe that the original car's brake discs are damaged. Therefore, when replacing the new pads, they often do not actively check the brake discs for scratches. Only when the new pads make a sound can they be inspected again, can scratches be found on the brake discs, This often leads to drivers demanding compensation from repair shops, dealers, and manufacturers who replace the brake discs with new ones. This is clearly due to human factors causing the blame.
Handling method: When replacing the brake pads, it is necessary to first check the brake discs for scratches. If there are scratches, it is recommended to smooth them out or replace them with a new disc. If the driver does not agree, it should be noted on the repair order and signed by the driver, to avoid claims from the driver due to noise or disc damage in the future.
2. The surface of the brake disc is flat, but new pads make a noise.
A: The first reason for this may be that the repairman installed the brake pads off side, and when removing them, it can be seen that there are only local friction marks on the surface of the brake pads. Handling method: It can be removed and reinstalled. B: The second reason: Currently, among domestic manufacturers, the size of the friction blocks for the same model of brake pads is inconsistent, especially the width of the friction blocks. The size deviation between manufacturers can reach up to three millimeters. This causes the surface of the brake disc to appear smooth, but if the large-sized brake pads are installed on the brake disc that has been rubbed by the small-sized brake pads, they will also make a noise. Processing method: First disc, if not disc, it can be driven for a period of time, and after the traces match, it will not sound. C: The third reason is that after driving for a period of time, there is a sudden noise, which is mostly due to hard objects such as sand, iron scraps, etc. on the road being sandwiched on the brake pads when pressing the brake. This situation not only makes noise, but also easily damages the disc. However, during disassembly and inspection, sometimes foreign objects have come off or worn off. Handling method: If there are foreign objects on the disc, it should be removed before installation. This situation often only damages one of the four surfaces of the two discs, which is easy to see. But if the driver is not explained the reason, it is easy to incur claims. D: Sound after driving for a period of time. But it's not a creaking sound, it's a clattering sound, which may be caused by loose accessories on the brake pads. Handling method: Retighten or replace with a new piece.
