When the car is moving, there is a squeaky sound, what is going on

If you hear the abnormal sound of "Zizi" in the process of driving, and this is the abnormal sound caused by the problem of the engine belt, because the abnormal sound of "Zizi" is mostly the aging of each belt group of the engine, or the belt is too loose caused by the problem of the tensioner, the friction abnormal sound, belt slippage, etc., if there is a similar "Zizi" abnormal sound, then look for the major belt groups and tensioners inside the engine, such as engine timing belt, generator belt, circulating water pump belt, air conditioning belt, power pump belt, etc. The problem that causes this abnormal noise is the abnormal sound of the engine belt, which is caused by the smooth grinding surface of the joint surface of the belt and the pulley. It usually occurs when the engine speed changes rapidly, and sometimes the belt rings when the load of the attachment driven by the belt increases.

How to solve the problem of abnormal noise of engine belt.

1. Check whether the accessories driven by the belt are damaged, stuck, loose or the power of the accessories has increased.

2. Replace the belt, or use 100 gauze to polish the joint surface of the pulley and the belt (light grinding is fine).

3. The temporary solution can be to drop 1 2 drops of oil on the joint surface of the belt and the pulley (it will not affect the belt slippage).

If it is the generator belt that rings and the headlights are more obvious, you have to take off the generator belt, turn the motor pulley to see if the generator rotates smoothly, if the generator is normal, you can check whether the battery is not stored power, because the battery storage is not good will increase the load of the generator.

One possibility is that the brake disc and brake pad are always in slight friction due to the poor return of the brake cylinder; Another possibility is that there are hard spots on the surface of the brake pads, or foreign objects such as fine sand particles between the brake disc and the brake pads. First of all, it is certain that this kind of problem will not have a significant adverse effect on the working performance of the vehicle's braking system.

In addition, if you want to treat, it is recommended to go to the repair shop to check whether the brake cylinder has a bad return phenomenon, or remove the brake burner plate and polish the surface of the friction Zhengpai, which will generally be significantly improved.

If the car squeaks when driving slowly, it is likely to come from the suspension, which includes connecting rods, springs, shock absorbers and balance bars. It is recommended to send it to the 4S shop to investigate the cause and then repair it.

If the engine belt is loose, then there will also be a squeak, at this time you can try to clamp the transmission belt with your fingers, and then twist it, pay attention to the operation should be carried out when the engine is cool, the twist angle should generally be below 90 degrees, otherwise the tightness must be adjusted.