What s the deal with a car squeaking while it s moving?

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.

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.

Abnormal wheel noise: Abnormal wheel noise is likely to be caused by untimely maintenance of the vehicle, or often driving on bad roads, resulting in uneven wear of tires, and serious wear of tire bearings.

It is difficult for ordinary car owners to distinguish which are fault abnormal noises and which are reasonable abnormal noises. Only nearly 20% of the vehicles that went to the repair shop to detect abnormal noises really had problems. Models equipped with turbocharged engines are different; Models with engine guards may also make noises due to friction; After some car owners come into contact with different cars, it is likely that due to their lack of understanding of mechanical knowledge, they mistake reasonable abnormal noise as a vehicle failure.

Therefore, learn to distinguish the abnormal noise of the car and avoid wasting time and energy.

Second, the identification method of car noise:

In practice, due to the limitations of working conditions, it is difficult to measure the sound of the car with special instruments, and the sound of the car can only be described and compared with the judgment of the sound in daily life. For example, the "rattle" sound caused by the dry friction of the bearing, and the "click" sound similar to the small hammer hitting the cement floor caused by the excessive valve clearance.

1. Correctly distinguish between normal and abnormal sounds.

The vibration of each mechanism in the work of the car will emit a variety of sounds, but the sound does not mean that the car is faulty, in order to avoid unnecessary disassembly, we must first distinguish between normal sound and abnormal noise. The normal vibration sound of each system component (such as the noise on the surface of the engine), the impact sound of the gear when shifting, the air intake sound and exhaust sound of using gas as the working source, and the gear meshing noise are all normal sounds. Abnormal noise (abnormal noise) can be divided into slight noise, general noise and malignant noise according to the impact on the performance of the car.

Slight noise, such as the flashover sound of high-voltage electric leakage, the slight loose sound of rolling bearings, etc., the general volume is small, the degree of wear of the parts is not large, and there is no significant change for a long time, and this kind of fault can still maintain the normal operation of the car without repair.

3. When diagnosing abnormal noise, attention should be paid to creating good auscultation conditions and trying to eliminate the interference of other noises, so as not to affect the accuracy of judgment.

It is best to consciously amplify or reduce the sound, that is, use a screw or other metal rod as a stestological instrument to contact the sound part to amplify the sound, or use a single cylinder fire cut-off to reduce the sound to meet the diagnostic needs. The auscultation site should be kept quiet to minimize human interference.

Please check whether the hand pick is put some plastic products to cause resonance during the car, or check whether the right front and rear door outside the door lock hand is loose, which can also cause resonance between the travel. Because sometimes it's the little glitches that don't make it easy for us to notice. If there is no problem after Minyin has been checked, then please go to the 4S point and ask someone to check the right front and rear shock absorption, check the chassis screws, check whether the door panel has loose screws, and check whether the inner door panel has buckle breakage.

I hope to solve the abnormal noise as soon as possible, because it is really annoying to have abnormal noise during driving. The reason for the squeaking sound in the car driving: one may be due to the phenomenon of poor return of the brake cylinder, which leads to the phenomenon that the brake disc and the brake pad are always in slight friction; 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 cause obvious adverse effects on the working performance of the vehicle brake rubber system, in addition, if you want to deal with it, it is recommended to go to the repair shop to check whether the brake cylinder has a bad return phenomenon, or the brake pads are removed after grinding the friction surface bridge wheel hall will generally be significantly improved. @2019