What is the cause of abnormal car noise?

Automobile squeak includes engine squeak, clutch squeeze, transmission squeak, final drive squeak, suspension system squeak, brake squeak, steering squeak and body squeak.

On the issue of abnormal noise of automobiles, it is difficult for ordinary car owners to distinguish which ones are abnormal noises and which ones 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.

Automobile squeaks include engine squeaks, tire squeaks, seat squeaks, interior squeaks, brake noises, etc. , mainly caused by insufficient lubrication or parts rubbing against each other. The solution is to check it out and then lubricate or replace the parts depending on the specific cause.

1.Abnormal Engine Noise:

The causes of abnormal engine noise include lack of cylinder in the engine, improper use of oil, improper belt tightening, etc. In this case, check the tightness of the spark plug, oil level, and timing belt.

2.Abnormal tire noise:

Abnormal tire noise can be caused by deformation of the wheel, nails on the tire, etc. In this case, you should go to the repair shop for inspection.

3.The seat makes an unusual sound:

Seat squeak is usually caused by a lack of lubrication in the seat sliding device, so adding some lubricating oil is sufficient.

4.Abnormal Internal Noise:

Abnormal noise in interior decoration is usually caused by loose screws or poor assembly process, which should be checked in detail.

5.Abnormal braking noise:

Abnormal brake noise is usually caused by brake pad wear. In this case, the brake pads should be inspected and replaced if necessary.

Cars are the usual means of transportation for our daily travel. As the service life increases, parts will deteriorate due to external reasons, or inadequate maintenance. , which will lead to various failures in daily use. Next, let's talk about the common abnormal noise faults of automobiles.

There are many kinds of abnormal noises in automobiles, such as steering wheels, tires and other components, which are due to internal reasons or external road conditions. Next, let's elaborate on the causes of these abnormal noises and how to fix them.

Abnormal body noise. During driving, body parts emit unusual noises, for example, wind noise can be clearly heard in the car. The reason for this is that there is a problem with the body structure, which causes abnormal friction or collision between the door and the car condition, or abnormal friction between the body welds and screws, which are the causes of abnormal body noise.

Solution; Although the abnormal noise of the body will not have a great impact on the overall performance of the car, it will bring a bad riding experience to the people in the car. We can eliminate abnormal noise by filling in the parts where abnormal friction and impact occur with sponges and other cushions.

Abnormal noise from the vehicle.

The abnormal noise in the car is mainly manifested as abnormal noise in the car, such as door panels, seat belt buckles, armrest boxes, etc. Due to the insecure installation, a collision will occur during the driving of the car, resulting in abnormal noise.

Solution: Check the reason for the parts in time, if the installation is not firm, it needs to be tightened in time. It is also possible to cushion and reduce friction by filling the gap with a soft object.

Tires are unusually noisy.

The tire is the part that mainly rubs against the ground during the driving of the car, and it is also the part that carries the overall weight of the car. In long-term use, abnormal noise will be generated during driving due to the mixing of the tread with stones or nails on the road surface.

Solution: Check whether there is any foreign matter on the surface of the tire, whether the tire pressure is normal, clean the surface to ensure that the tire pressure is normal.

The steering wheel is unusually noisy.

The steering wheel is the main component that the driver uses to control the direction of the vehicle. With long-term use, the steering wheel will deteriorate due to frequent use or service life, resulting in increased friction and abnormal noises such as "clucking" when used.

Solution: For this aging part, the most effective way is to go to a special repair shop or 4S shop for replacement.

The car is a wear and tear product, parts in long-term use will inevitably wear out because of it, and it is precisely because of this that daily maintenance is particularly important, so a good way to avoid car noise is that we must do a good job in daily maintenance. Only in this way can we ensure that the probability of failure can be reduced when we use the vehicle.

What should I do if my car makes an abnormal noise? The master tells you how to solve it.

There are many possibilities of abnormal noise in the car, under normal circumstances, the car can only produce abnormal noise after two or three years, and the parts may collide with each other after a long time, and it is imperative to repair the car at this time.

The car is unusually loud.

In the use of automobiles, when a failure occurs, it is often most likely to manifest itself in the form of abnormal noise. Under normal circumstances, both the driver and the passenger can hear it. Experienced people can judge car failures based on the location of the abnormal noise and the different frequencies and timbre of the sound.

The general sound is dull and accompanied by strong shaking when the fault is more serious, should stop, reduce the engine speed or turn off the engine to find, some sounds are some parts of the fault, do not affect the use of the car, can not be found out for a while, you can drive the car back to the base or drive into the nearest car maintenance department to ask experienced personnel to find.

First of all, you have to find out the abnormal noise of the good cherry blossoms, because you directly ask what is going on in the car, then first of all, you don't know whether the abnormal noise comes from, first of all, you have to check yourself: 1. The abnormal noise of the door, if it is a door, because the structure of the door is relatively simple, then you have to see if it is because the screws are not tightened; 2. If your car is with a sunroof, then you have to see if the sunroof has any abnormal noise, and the abnormal noise of the sunroof is generally normal, because after driving the car for many years, the guide model in the sunroof will fall with small stones or gray dust or something, and if the sealing is not tight for a long time, it will produce abnormal noise; 3. This kind of problem is actually not a big problem, generally you have a luxury car like BMW and Mercedes-Benz, and he will also have a sunroof.

Abnormal noise**1: storage compartment. I believe that most car owners do not have the habit of tidying up the storage compartment, the car has not been sorted out for several years The storage compartment must be full of messy items, so that no matter where the car is driving, as long as the engine opens the storage compartment The items in the compartment will follow the engine "beating", and the abnormal noise you hear is likely to be the vibration of the storage compartment.

In fact, it is very simple, everyone only needs to observe that when the speed increases, the louder the sound, it proves that the car transmission system is faulty. The most effective solution is to see if the car tires have collapsed, if there is, it is recommended that you go to a regular car 4S shop for maintenance.

Abnormal noise to the group posture auspicious source three: abnormal noise outside the car. If the abnormal noise heard is from outside the car, we should first look at whether the doors and windows of the car are normal, and at the same time see if there are things in the trunk.

In addition, you should also check whether there is any debris around the wiper, and clean it up in time if there is one, so as not to affect the normal use of the wiper.

You must know that the service life of car pulleys is about eight years, and if you have not replaced the car pulleys for more than eight years, it will make a "cough" sound in the cold winter. If you want to change the pulley, it is recommended that you go to a regular car 4S shop to replace it, and do not do it yourself, otherwise improper operation will cause damage to the car.

Automobile abnormal noise includes abnormal engine noise, tire abnormal noise, seat abnormal noise, interior abnormal noise, brake abnormal noise, etc., mainly caused by insufficient lubrication or friction between parts, the specific solution is to check it, and then lubricate or replace parts according to the specific reason. Buried bump rush.

1. Noise of this engine abnormal noise:

The causes of abnormal engine noise include lack of engine cylinder, improper use of engine oil, and improper belt tightness. In this case, check the spark plug, oil level and the tightness of the timing belt.

2. Abnormal tire noise:

Abnormal tire noise may be deformed wheels, tires pierced with nails, etc. In this case, you should go to the repair shop to check it specifically.

3. Abnormal seat noise:

Seat squeak is generally caused by the lack of lubrication of the seat sliding device, and only need to apply some lubricating oil.

4. Abnormal sound of inward bending ornament:

The abnormal noise of the interior is generally caused by loose screws or poor assembly process, which should be inspected in detail.

5. Abnormal brake noise:

Abnormal brake noise is generally caused by the wear of brake pads, in this case, the brake pads should be checked and replaced if necessary.