What is the reason for the friction sound when the car is driving? What is the problem when the brakes make abnormal noise when driving?

The driving process of the car should be very smooth, and there should be no abnormal noise or excessive noise. Many car owners may encounter abnormal noises of friction while driving, so under what circumstances will there be friction sounds while driving?

What is the reason for friction noise when the car is driving?

It is recommended to check the wear of the brake pads and observe whether the brake pads have been worn to the safety line. There is a warning line on each pair of brake pads, similar to an iron sheet. When the brake pads are worn to a certain position and touch the iron sheet, a very harsh sound will be made. Some high-end cars will directly prompt to replace the brake pads. If there is a sound shortly after the brake pads have been replaced, be sure to check whether the brake frame and brake pads are installed properly and whether the brake shock-absorbing glue has been applied.

If every time you start the car, especially in the morning when it is cold, there is a harsh sound when you step on the brakes, and there is no sound at all after the car is warmed up, it is because there is moisture on the brake disc. When you step on the brakes, it is equivalent to water on the brake pads, which makes the sound. Once it evaporates, there will be no problem.

There is foreign matter in the brake disc, which is also the most common phenomenon. The brake disc is of hollow design, and small stones are very easy to jump into the hollow part, which will make a lot of noise when the vehicle is moving.

In addition, you should also consider the quality of the brake pads. Generally, household cars use semi-metallic brake pads, which are wear-resistant but very noisy.

Another point that is most easily overlooked is that there are large foreign objects on the tire, which causes the tire to make a loud noise during driving, which people mistakenly think is the sound of braking.

There is also a possibility with the smallest probability, that is, the bearing is broken. When the car is driving, the faster the speed, the louder the noise.

What is the problem when the brakes make unusual noises while driving?

1. Maybe your car has not been driven for a long time and the brake pads have rusted. There is a strange noise when you brake at the beginning, which disappears after a certain distance and a few times of braking.

2. If the sound is very sharp and does not disappear after driving for a certain distance, it may be that the brake pads are severely worn. It is recommended to check and see if they need to be replaced.

3. Check whether there is any foreign object between the brake discs. Clean it and apply a little oil, and the sound will disappear.

4. After all the above situations are eliminated, it may be that the caliper is not reset in time, causing the disc to rub for a long time, and the sound will be very loud. In this case, it is recommended that they go to the repair shop and let them help you adjust it.

What to do if the car stalls while driving

After the engine is turned off, it will not cause the vehicle to lose control. First, you should try to restart the engine. If not, follow the steps below:

1. Turn on the hazard warning lights (double flash)

2. Increase the force of the brake to reduce the speed appropriately

3. On expressways, merge into the emergency lane; on ordinary roads, merge to the right side of the road.

4. Keep pressing the brake pedal rhythmically to slow down until the car stops.

5. After the vehicle stops, place a warning triangle 150 meters behind the vehicle (the distance should be appropriately controlled on ordinary roads)