What is the reason for the abnormal noise on the right front of the car?

The abnormal sound of the body is usually due to the deformation of the vehicle in driving caused by the insufficient stiffness of the body, the friction or shaking of the door and the frame, and the dewelding of other places and the friction between the steel plates.

If there is an abnormal sound on the belt, it is generally caused by the belt slipping, and if you hear the sound of air leakage, it is likely to be the air intake system and vacuum tube.

Problems such as blockages or breaks; In addition, the abnormal noise caused by the friction of external metal accessories when the engine is running may be caused by damage to the generator, water pump, etc.

Precautions for car inspection.

The brake inspection mainly detects the maximum braking force of the left and right wheels, the maximum difference between the braking force of the left and right wheels in the whole process of braking force growth, the braking coordination time, the wheel blocking force and the parking braking force. The main thing is to look at the braking system of the car.

and whether the braking system can be qualified.

One of the most easily overlooked and not easy to pass the annual inspection is the car lights. If the light is too dim or too strong, it is considered unqualified, and if the light is too dim, it is necessary to check whether the light circuit and bulb are aging, and replace the relevant parts in time if necessary.

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.

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Hello, the reason for the abnormal sound of the right front wheel of the car: 1-loose ball head of the vertical tie rod, 2-aging of the ball head of the rubber sleeve of the lower arm, 3-top angle bearing of the shock absorber, 4-abnormal sound of the ball cage on the right, 5-loose screw of the right chassis. These reasons may cause abnormal noise, it is recommended to go to the repair shop for specific checks.

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The following are the specific reasons for the abnormal noise on the left side of the car running: 1. Exhaust part failure: the sound caused by the leakage of the exhaust interface pad or the perforation and leakage of the exhaust pipe.

2. Failure of the intake part: the intake manifold or throttle body is leaking or the seal is not tight. 3. Partial failure of the engine chassis:

Abnormal noise caused by abnormal noise inside the engine or accessories around the body, or chassis parts due to loose accessories, abnormal noise or interference resonance. 4. Failure of the internal cause of the transmission: such as abnormal noise caused by lack of oil or abnormal wear during driving.

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.