4hw.com.cn: many car owners have responded that in real driving, they will always find the problem of abnormal brake noise. Whether it's an old car that has been driving for many years, or a new car that has just driven thousands or tens of thousands of miles, this problem may occur. So what causes the abnormal brake noise? How can we solve it?
What should we check when the brake makes a strange noise? First of all, you can check whether the brake pad friction traces left by the brake disc are normal. If there is a brake system with abnormal noise, its brake pad and brake disc friction traces will be somewhat different.
If there is a bright color on the brake disc, it means that there are impurities in the brake disc. When we step on the brake, the impurities in the brake disc rub with our brake disc violently, resulting in abnormal noise when braking.
At this time, the best solution is to change the brake pads. What are the precautions for changing the brake pads?
The brake pads also need to be run in. Normally, they need to be replaced when the loss of the brake pads is less than 1mm. Normally, they need to be replaced after driving 30000-40000 km. If there are impurities in the brake pads, they also need to be replaced. And the new brake pads also need to go through a certain running in period, in order to effectively maximize its braking effect.
The brake pads are divided into disc brake and drum brake, and the materials generally include resin brake pads, powder metallurgy brake pads, carbon composite brake pads and ceramic brake pads. The brake pads and brake pads will wear after use for a period of time, and there will be many bumps on the contact surface between them. The brake discs and brake pads are in close contact with each other, which is similar to teeth At this time, the contact area between the brake pad and the brake disc is always the largest, and the braking capacity is also relatively strong. Therefore, in order to ensure the maximum contact area between the brake pad and the brake disc, it is necessary to run in.
So how to run in the brake pads? Generally, the new brake pads need to be run in for 200km to achieve the best braking effect. Therefore, it is suggested that the vehicles just replacing the new brake pads should drive carefully, and check the brake pads every 5000km to ensure driving safety.