The chassis clattered and made a strange noise, what s going on, the chassis was always abnormal

Oil leakage from the shock absorber. When the oil seal inside the shock absorber is aging, the lubricating oil inside the shock absorber will seep out, affecting the lack of internal lubrication. At this time, it can only be solved by replacing the shock absorbers.

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 distinguish between sound and natural suction; 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.

How to identify the sound of a car:

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.

1. Sounds coming from inside the car.

1. The sound of rebounding the clip after the turn signal.

If the steering wheel will have this sound after hitting the steering switch, it is the sound of the rebound clip of the turn signal automatic return mechanism, and this sound is normal. If you hit the steering wheel, there will be a pimple, and the steering wheel will turn around and it will appear three pimple sounds, because the steering column has three automatic return card positions in a circle, so this sound will appear. As soon as you turn off the turn signal, the sound will disappear.

2. The sound of the dust jacket of the direction column.

Whether you are in place or driving as long as you hit the steering wheel, you will hear the sound coming from under the steering wheel, you should check the steering post dust jacket, once the steering post dust jacket lacks lubrication, it will produce a dry friction sound, you just need to apply some butter in the dust jacket This sound will disappear.

3. The sound emitted by the interference of the airbag hairspring.

When playing the direction, the sound is emitted from the steering wheel, most of this problem is caused by the interference of the airbag hairspring in the steering wheel, remove the steering wheel airbag hairspring and apply some butter to see if it still sounds, if it still rings, replace the airbag hairspring, because the airbag hairspring is damaged.

Second, the sound coming from outside the car.

1. The sound emitted by the plane bearing of the shock absorber.

Hit the steering wheel to hear the sound is made from many outside the car, this may be the sound of the plane bearing of the shock absorber is short of oil, you just need to open the front cover to listen to whether the sound is from the position of the shock absorber top seat, so that you know whether it is the sound of the plane bearing of the shock absorber, the plane bearing of the shock absorber sounds, you can apply some butter on the plane bearing, if it is still loud after coating, it can only be replaced.

2. The sound of the balance rod glue loosening.

The sound is not emitted from the plane bearing of the shock absorber, it is necessary to check whether the balance bar rubber is loose or damaged, the balance bar rubber is loose and damaged, not only will it sound when playing in the direction, but also make a sound when crossing uneven roads, and the loosening of the balance bar rubber can be solved by adding a gasket, and if it is damaged, it can only be replaced.

For the problem of abnormal noise, only by finding out the sound ** and determining the part of the sound can there be a solution.

<> "Why does the chassis always make abnormal noises after driving the car for a few years?"

In the eyes of most car owners, driving is like falling in love, and they are quite affectionate at the beginning, but over time there will be various emotional problems. As a consumable product, there will inevitably be large and small faults, among which the most headache and the most fragile is the chassis. The chassis of an automobile is usually composed of four parts: the driving system, the transmission train, the steering system and the brake system.

The quality of the chassis will directly drive the quality, the light will shake and make abnormal noise, and the heavy chaos will affect life. It is necessary for the owner to grasp some of the causes of abnormal chassis noise, so that he will not be confused when changing parts.

Next, we will introduce several common causes of chassis squeaks, and basically follow these items to quickly find the source of squeaky noise.

There is a faulty tire.

Car tires are a very important part of the car, it is in direct contact with the ground, and plays a role in carrying the weight of the car and ensuring comfort. The service life of tires is generally linked to the degree of wear, but there are some special circumstances, such as tire studs, tire bulges, etc., which will shorten the life of tires. At the same time, loose tire screws or insufficient air pressure are also one of the causes of abnormal noise.

The braking system cannot be ignored.

The braking system is also a non-negligible part of the car, usually you can first judge the vacuum booster pump connected to the brake pedal to see if there is air leakage and oil leakage, and the simplest judgment is to feel whether the strength of the brake pedal is the same as before. In addition, the brake pads are also prone to abnormal noise, and the sound is very harsh. Pay more attention to the brake system and replace the brake pads in time to avoid brake failure.

Hub bearings "buzz".

Some friends just replaced the bearing in less than half a year to break, the sound volume is proportional to the speed of the car. This kind of problem is generally related to four-wheel alignment or overload, and the abnormal noise of the wheel bearing will lead to the scrapping of the bearing (assembly) if it is not timely, and even the brake pads will be abnormally worn, which will affect the brake and driving system.

The drive half shaft "rattles".

The connectors of the automobile are prone to fatigue wear and impact in long-term work, and over time they will lose their original characteristics and make abnormal noises, and their sound sources are mostly "gurgle". Although the squeak of the half shaft has no direct impact on safety, it is also a safety hazard, and it is really annoying in the long run. The owner can drive the vehicle to a flat hail road, and then gradually increase the throttle, and carefully feel the shaking caused by the platform, and listen to whether the sound is abnormal, if the frequency of abnormal noise is very fast, most of it is a half-shaft problem.

Bushings and pads are annoying.

In the chassis of the car, if the parts are directly "hard" connected to each other, the passengers in the car will be shaking! Therefore, the bushing and liner play the role of cushioning the sail. Because the material is mainly rubber, it will be deformed after a long time of stretching or extrusion, which will lead to rupture and all kinds of abnormal noises.

However, in actual operation, such as the bushing between the subframe and the body is difficult to replace, and the cost is also very high, some car owners said: the bushing is only dozens of dollars, but the cost of working hours is hundreds or even thousands, which is quite uncomfortable!

Hello, the common causes of abnormal chassis noise in different states of the car are as follows:

1.The chassis makes an abnormal noise when steering.

When making a U-turn, you can hear a metal "click", which is usually caused by damage to the outer cage. Because the outer cage dust jacket can isolate the dust in the vehicle, it is important to protect the outer cage. When we carry out vehicle maintenance, we should pay attention to check whether the outer cage dust jacket is damaged.

2.The chassis makes an abnormal noise when the brakes are applied.

Hearing a continuous screeching sound when applying the brakes is generally caused by brake pad wear. Judge the front and rear wheels according to the position of the sound, and then check the wear of the front and rear brake pads, and replace them with new brake pads. If it is a "clang" or "clang" sound, you should check whether the brake system parts are loose.

3.The chassis makes an abnormal noise when passing over a speed bump.

It is common for two parts to be affected by an impact, resulting in an abnormal sound, which can be eliminated by replacing the relevant parts. It may also be caused by loose or damaged bolts and nuts, so you can go to the service station to reinforce or replace the bolts and nuts.

4.Chassis squeak when shifting.

This can be caused by wear or lack of oil in the gears inside the transmission, and the solution is to check that the transmission lubricant is sufficient, and if there is no external fault, you can only go to the service station to unpack and check.

5.Abnormal chassis noise during driving.

This is usually due to damage to the bearing beads and rails, as well as the different levels of sound produced at different speeds. Due to their large size and heavy load-bearing, the front wheel bearings make a deeper sound, while the rear wheel bearings make a higher tone.

In case of bearing damage, it is sufficient to go to the service station and replace the bearing with a new one. Of course, the abnormal noise during driving may also be tire noise, which is related to driving road conditions, inclusions in the tread, etc.

Based on the situation you described, it should be a problem with the balance bar, link bar, or lower arm ball joint.

The balance lever commonly used in car modification is commonly known as "top bar, tie rod". The English meaning of bar is the meaning of pull rod. According to its different purpose and functional requirements, it is divided into five categories: front wheel suspension tower top balance rod, front bottom beam balance rod and so on.