What is the reason for the squeaky sound when the car is bumping

The reasons for the squeaky sound when the car is bumpy are: 1. The connecting screw part of the ground parts is loose and needs to be tightened. 2. The shock absorber is abnormal and needs to be replaced. 3. The most serious thing is that there is an abnormal sound in the body, which requires a change of car.

Abnormal noise, can be called a big hatred of the owner, thinking that the car is driving too fast and then produces abnormal noise, but slow driving still has a squeak, in the face of it, really helpless. Indeed, abnormal noise is a relatively difficult fault to deal with, and there are a lot of abnormal noises, if they are not solved in time, I am afraid that it will evolve into a great safety hazard. So let's look at the causes of the squeaky squeak of the car.

1. If the car squeaks when driving slowly, it is likely to come from the suspension, which includes connecting rods, springs, shock absorbers and balance rods, and one of the components is abnormal, such as loose bolts, which may cause abnormal noise due to shaking.

2. If you step on the brakes lightly and find that the abnormal noise increases, then it is certain that there is a problem with the braking system, such as the brake pads are too thin, the brake disc and brake pads are worn unevenly, and the brake cylinder, master cylinder, caliper is faulty, etc., which will lead to abnormal noise in the braking system, which is mainly manifested as a sharp and continuous sound.

3. If the engine belt is loose, then there will also be a squeak, at this time we can try to clamp the transmission belt with our fingers, and then twist it, pay attention to the operation should be carried out under the condition of the engine cooling, the twist angle should generally be below 90 degrees, otherwise the tightness must be adjusted.

4. Aging of components, this situation may occur in places with rubber parts, here we should pay attention to a place, it is the engine mount rubber pad, if it ages and hardens or cracks, it will cause the car to increase vibration, steering wheel trembling, and noise to become louder. (Photo by Huang Guihong) @2019

When the clutch release bearing is damaged, the clutch plate cannot be completely disengaged, which eventually leads to an abnormal sound during acceleration.

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. In the case of a turbocharged engine, there is a must be a difference between the sound and the sound of a naturally aspirated engine; 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 they lack their own understanding of mechanical knowledge, so they can 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.

The squeak of the car over a bumpy road is the reason for the stabilizer bar. Check whether the stabilizer bar rubber sleeve is aging, and there will be this sound when it is aging and hardening.

1. The connecting screws of the site parts are loose and need to be tightened.

2. The shock absorber is abnormal and needs to be replaced.

3. The most serious thing is that there is an abnormal sound in the body, which requires a change of car.

Possible causes of abnormal noise when the car is bumpy:

Swing arm: the role of the swing arm is to support the tire, so how can this cause abnormal noise, the swing arm has two positions with rubber pads, and the other position is to install a small ball head, set on the horns, due to long-term driving and rotating the steering machine, will lead to the wear of the small ball head and the rubber pad, resulting in too large a gap, abnormal noise when driving on uneven roads, as long as we replace the new swing arm, the abnormal sound can be directly solved.

Balance rod ball joint: commonly known as a small tie rod, the function of this accessory is that my car can maintain the stability of the car during driving, such as when the horizontal height of the left and right wheels is different, in order to prevent the twisting of the shaft.

The balance bar will produce anti-roll resistance to inhibit the rolling of the body, so why does this little thing also cause noise, the reason is the same as the ball head of the swing arm, due to long-term driving and turning, it will lead to excessive wear and tear inside the ball, resulting in too large a gap, and the solution to the abnormal noise, replacing new accessories can also directly solve the problem of abnormal noise.

1. Check whether the chassis rubber pad is worn.

2. Whether there is a shortage of oil in the ball head.

3. The shock absorption is worn or the quality is not good.

Every car has a resonance point, and the speed of the vehicle at the resonance varies. It is generally believed that the higher the speed of the vehicle at resonance, the better the quality of the car. Resonance occurs around Poussin 100, and resonance occurs at 200.

When you turn on the air conditioner and feel the car shaking, it's not resonance, it's a lack of engine power.

The abnormal sound produced by the sunroof slide.

Some car owners rarely use the sunroof of their car, and once used, the sunroof will make a "squeak" sound. Experts said that the situation of the sunroof of the car is the situation that many car owners often "only know how to use, but do not know maintenance". In general, sunroofs should be lubricated at least once every two or three months.

Otherwise, it will make abnormal noise, poor movement, and even burn out the motor.

Experts said that car owners can use cotton cloth, gauze to wipe the track of the slide rail, after wiping clean, apply a small amount of grease to the slide track, generally 4S professional maintenance using tiger head hotolube or Kruber car sunroof grease. The maintenance interval is three to four months.

Do not use petroleum jelly or motor oil, as it will pollute the interior and emit harmful odors.

Abnormal noise caused by the door hinge.

After the hinge is used for a long time, it will greatly increase its friction, and then produce abnormal noise, then what we need to do is to apply grease, you can use the door hinge grease of the tiger head hotolube, which is the grease used for 4S maintenance. In this way, the friction will be greatly reduced, and there will be no abnormal door noise. The maintenance interval is three to four months.

Abnormal noise from the door limiter.

If the door limiter is not regularly maintained, it will also make the door make abnormal noise, what we need to do is to apply some of the same grease as the door hinge, so that the friction of the door limiter will be greatly reduced, and the abnormal noise of the door will be solved.

Do you have an unusual noise when your car crosses a bumpy road? It's a problem here, use this method to make the abnormal noise disappear.

1. Check whether the chassis rubber pad is worn.

2. Whether there is a shortage of oil in the ball head.

3. The shock absorption is worn or the quality is not good.

Your car is very new, there should be no such sound, unless you often walk bumpy roads, the above points, can be oiled, can be oiled, with a brush can also be painted, it should be fine, and when brushing the car, try to brush as little as possible under the car or under the hood.

It doesn't matter, it's just some rubber pad rubbing sound,

The reasons why a car squeaks when it jolts are as follows:1. The attachment screws of the field parts are loose and need to be tightened. 2.The shock absorber is abnormal and needs to be replaced. 3.The most serious problem is that there is abnormal noise in the body, so this one needs to be replaced.

The abnormal noise can be regarded as a big hatred of the car owner, thinking that the car is driving too fast and then the abnormal noise happens, but there is still a squeaky sound when driving at low speeds, and there is really no way. It is true that abnormal noise is a difficult problem to solve. There are a lot of abnormal noises.

If it is not solved in time, I am afraid it will evolve into a big security risk. Then, let's see what causes the car to squeak. 1.

If the car squeaks at low speeds, it's most likely from the suspension. The suspension of a car includes connecting rods, springs, shock absorbers, and balance bars. If one of the parts is abnormal, such as a loose bolt, it may produce abnormal noise due to shaking.

2.If you apply the brakes lightly and find that the abnormal noise increases, then you can determine that there is a problem with the braking system, such as thin brake pads, uneven wear of brake discs and brake pads, faulty brake cylinders, master cylinders and calipers, etc. , all of which can lead to abnormal noises in the braking system, which are mainly manifested as sharp and persistent noises.

3.If the engine belt is loose, it will squeak. At this point, we can try to hold the belt with our fingers and twist it.

Note that to operate when the engine is cooling, the torsion angle should generally be below 90 degrees, otherwise the tension should be adjusted. 4.Parts are aging, which can happen where there are rubber parts.

One thing to note here is the engine mount rubber pads. If it ages, hardens, or breaks, it causes the car to vibrate, the steering wheel to tremble, and the noise to increase.

Most of them are caused by the aging and hardening of the top rubber of the shock absorber.

There is rubber at the junction between the shock absorber of the vehicle and the body. This rubber is called shock absorber top rubber. The purpose of this rubber is to provide cushioning for the car body and reduce vibrations. Over time, the rubber will age, and the aging rubber will harden, so when passing through some potholes, the body will squeak.

The solution to this problem is to replace the top rubber of the shock absorber, and the cost of replacing the top rubber is not high.

Most old cars will have the problem of abnormal noise. There are many types of abnormal noise**. For example, there are abnormal noises in the interior, chassis, engine and gearbox. Most of the abnormal noise is caused by an increase in the amount of noise.

The abnormal sound of the interior is caused by the loosening and vibration of the interior panel and the failure to fix the interior panel firmly after driving on the bumpy road for a long time. It can also be caused by a broken interior plate fixing buckle. Generally, it will not break if it is not dismantled. If the buckle is removed, it will basically break.

The abnormal sound of the chassis is caused by the transmission system, such as half-axle cage, differential, rear-wheel drive** transmission shaft, etc. The chassis also has a lot of rubber parts and is designed for comfort. Over time, the rubber will age, and the aging rubber will harden.

The rubber stiffens without any cushioning and shock absorption, and the chassis makes a squeak when passing over some bumpy roads.

Squeak and squeak in the engine transmission are often caused by untimely repairs or increased wear clearance between moving parts. Some older cars still knock on the cylinder because the engine wall is worn, and as the mileage increases, the gap between the piston and the cylinder wall increases. The abnormal noise of the gearbox is mostly due to the abnormal wear of the gears, and the abnormal noise caused by the excessive clearance between the gears due to the long-term failure to change the transmission oil.

The gearbox is also an assembly that needs to be maintained. Transmission fluid is not maintenance-free for life. Transmission oil needs to be changed every 80,000 km or so.

If the car squeaks over a bumpy road, it may be that the shock absorber part is deformed, oil leakage, internal parts, rubber sleeve damage, or the suspension part is displaced, deformed, buffer rubber sleeve, block damage, etc. The detailed reasons are as follows: 1. The shock absorber is damaged

It will cause the car to have no damping and rebound when crossing bumpy roads, and it will be easy to produce abnormal noises when passing speed bumps or bumpy roads. 2. Interior damage: Most of the noise in the interior is due to the loosening of the interior panel.

3. Suspension damage: There are basically rubber bushings between the suspensions, and rubber bushings can improve comfort. However, the long-term use of rubber products will have aging phenomenon, after the aging of the rubber bushing, it will affect the suspension's spaciousness, which will affect the vehicle when passing through some bumpy roads or speed bumps.

The reason for the creaking sound when the vehicle is bumping: the aging of the shock absorber on the roof of the car: there is rubber where the shock absorber of the vehicle is connected to the body.

This rubber is called shock absorber top rubber. The function is to provide cushioning for the body and reduce vibrations. After a long time, the rubber will age at the end of the year, and the aging rubber will harden, so when there are some potholes, the body will make a creaking sound.

The top rubber of the shock absorber can be replaced. Abnormal engine noise: Poor maintenance or increased wear gap between moving parts.

Abnormal sound from the roof light in the car: If the screws of the roof light in the car are not tightened or clamped properly, there will be an abnormal sound. When installing the dash cam, the wiring harness was not fixed and waited for the boot. :

Only by putting the harness in the right place can you solve the problem.