Consult an expert about the problem of abnormal noise on the chassis of the vehicle

Transmission parts are very coming.

Easy to produce. Self-abnormal noise, such as half-BAI shaft ball cage, ** transmission DU shaft of rear-wheel drive vehicles, differentials, etc. Most of the reasons for abnormal noise of the transmission parts are caused by the increase in the amount of space, or the lack of lubrication and excessive wear. The solution is to replace the transmission parts, or disassemble the transmission parts and add grease.

The rear differential of some rear-wheel drive cars needs to change the differential oil, if it is not replaced for a long time, the gears in the differential will be abnormally worn, resulting in an abnormal noise.

The suspension is also one of the most abnormal sounds, between the connecting rods of the suspension, between the suspension connecting rods and the subframe. The connecting rod of the suspension and between the suspension link and the subframe are rubber bushings, these rubber bushings are to provide better comfort and quietness, and the rubber will age and harden over time, and it will produce abnormal noises when crossing some potholes. The solution is to replace all the aging rubber bushings, and it is very cheap to buy rubber bushings, but it will take a lot of man-hours to carry out such work, so the cost of replacement is still relatively high.

The suspension can also cause abnormal noise when used for a long time. There is a top rubber where the shock absorber is connected to the body, and this top rubber will age and harden over time, which causes the body to creak when crossing some potholes. And after the top rubber aging, when you walk on some small bumps on the road, you can feel that the tires of the car are shaking very much, and there are a lot of aftershocks, which is because the top rubber hardens and cannot buffer these small vibrations.

The solution is to replace the shock absorber top glue.

What should I do if there is an abnormal sound on the chassis of the car, and what skills should I pay attention to when driving through the car?

1. The abnormal sound of the copy at the beginning of the vehicle is usually a suspension system failure, which may be caused by loose or damaged engine stands;

2. The abnormal noise emitted by the vehicle when steering may be the fault of the steering system and the suspension system, because the vehicle tilts the vehicle during the steering process, deforms the suspension system, and also participates in the movement;

3. The abnormal noise emitted by the vehicle when driving in good road conditions may be the fault of the braking system components, or it may be caused by the loosening or wear of the braking system components, the brake drum is out of circle or the brake disc plane is uneven;

4. It may also be a problem with the bearing between the vehicle connection and static, if it is a bearing problem, the driver can distinguish it with a little brake, if the vehicle does a uniform motion with a brake sound, it is a problem with the bearing.

The reasons for the abnormal noise of the vehicle chassis are: the quality of the car itself, or the accident car, or the car environment that causes the chassis to be loose, check the rubber sleeve of the balance bar, whether the brake pads are easy to use, and the connection between the suspension and the shock absorber. 1.

There is a problem with the rubber sleeve of the balance bar. Phenomenon: When the vehicle passes through uneven roads, the chassis will make abnormal noises.

Equalizer bars are also called anti-roll bars and stabilizer bars. There are two clasps on the equalizer bar. Inside the buckle is a rubber sleeve for the balance bar.

Cold in winter and hot in summer, coupled with soil and dust erosion, will become harder and harder as it ages. As a result, when the vehicle passes over uneven roads, the height of the left and right wheels is inconsistent, resulting in a creaking noise. Workaround:

Just replace it. 2.There is a problem with the brake pads.

Phenomenon: There is an abnormal noise under the front wheels, especially when playing the steering wheel. When it rings, hit the brakes to see if it still rings.

If it doesn't ring, you can basically determine that there is a problem with the brake pads (there is also a possibility that there is a problem with the outer cage). Solution: Replace the brake pads.

3.There is a problem with the connection between the suspension and the shock absorber. If the chassis creaks when the car is moving, this is probably the reason.

Solution: After the vehicle is turned off, press the top of the suspension part of the body to make the body shake up and down. At the same time, you can listen carefully to the abnormal noise to determine which part is the problem.

The abnormal sound of the chassis of the car may be the abnormal sound of the suspension of the car. The suspension system of the car generally includes the upper and lower swing arms, balance bars, ball head shock absorption, etc., and the abnormal sound caused by the suspension system is generally a dull or crisp impact sound. For example, after the balance rod is damaged or the bushing is worn, there will be a continuous abnormal sound of "Gregrad" when passing through bumpy roads, and there will be a dull sound of "knock knock" when the shock absorption is damaged through pits or bumpy road sections.

If the vehicle has this kind of abnormal noise, it is best to repair it as soon as possible, as damage to the suspension system will lead to deviation from the direction and tires.

It is also possible that constant velocity joints are commonly known as cages, which are divided into inner cages and outer cages. If the vehicle turns in the middle of the driving and there is an abnormal sound similar to "rattle rattle", it is usually caused by serious wear and tear of the constant velocity universal joint, and you only need to confirm which side the abnormal noise is, and then replace the constant velocity universal joint can be solved.

Abnormal noise of automobile bearings. No matter how big the tires of the car, the connection between the body and the tires is by a small wheel core bearing, the core bearing is damaged, the vehicle will make a continuous abnormal sound similar to "buzzing", the faster the speed, the stronger the sound, if the bearing is slightly damaged, there will generally be abnormal sound when the direction is lightly hit. Severe bearing damage will cause the tire to deviate, and serious tire eating will cause the tire to fall off.

The above is the more common abnormal noise of the automobile chassis, if the vehicle has the above abnormal noise, it must be repaired and replaced as soon as possible. After all, there are many reasons for the abnormal noise of a car, so you have to go to the repair shop for detailed maintenance.

If the car chassis is abnormal, you can check the sound to see if the ball head is broken, or there is a problem with the suspension or shock absorption, you can go to the car repair shop for inspection and repair.

Check whether the connection between the chassis parts is tight, when the chassis bolts and screws are loose, the bolts and nuts should be tightened or replaced in time, if you need to drive often on bumpy roads, then you can check the chassis fasteners regularly.

You have to check if it's a sound before you can fix the problem.

We all know that the chassis is composed of four systems: the drive train, the driving system, the steering system and the brake system. It is an important part of the whole vehicle, with many parts and a wide distribution. So we have a lot of trouble judging it.

Causes of abnormal chassis noiseIn general, the causes of abnormal chassis noise are roughly as follows

We all know that the chassis is composed of four systems: the drive train, the driving system, the steering system and the brake system. It is an important part of the whole vehicle, with many parts and a wide distribution.

So we have a lot of trouble judging it.

The cause of the abnormal sound of the chassis.

In general, the causes of abnormal chassis noise are roughly as follows:

1. Interference between parts.

Possible cause: The two parts affect each other due to impact or the installation of other equipment.

2. Loose bolts or nuts.

Possible reasons: a. Driving on the road with poor road conditions for a long time, the bolts are naturally loosened;

b. Improper disassembly and installation of bolts damage;

c. The tightening torque is not enough or the bolt specification is wrong.

Solution: Tighten or replace the bolts and nuts.

First of all, it is necessary to find the cause of the abnormal noise of the car chassis

1. There is a fault in the tire, and the car tire is a very important part of the car, which 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;

2. The brake system is also a non-negligible part of the car, under normal circumstances, you can first judge the vacuum booster pump connected to the brake pedal to see whether it has 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;

3. The wheel bearing "buzzes", and the bearing that some friends have just replaced will be broken in less than half a year, and the sound volume is proportional to the speed of the car. This kind of problem is generally related to four-wheel alignment or overload, if the wheel bearing is abnormal, if it is not in time, it will lead to the scrapping of the bearing (assembly), and even make the brake pads wear abnormally, which will affect the brake and driving system;

4. The driving half shaft "rattles", and the connectors of the car 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 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.

The main reason for the abnormal noise in the chassis of the car is that the pressure bearing on the shock absorber is damaged, resulting in abnormal noise.

There are many problems of abnormal noise in the automobile chassis, and it is best to test the car in person to know that it is the best problem. Generally, it is the abnormal sound caused by the loosening of the ball head and the aging of the bushing.

This should not need to be solved by yourself, and it must not be solved, it must be tested by the 4S store, and the cause can only be treated symptomatically.

Finding the location of the abnormal noise is the premise of solving the problem. Just mention a chassis abnormal noise, no one can know how to solve it.

There is a creaking sound on the chassis of the car, and there are the following possibilities: 1. There is a problem with the rubber sleeve of the balance bar. The phenomenon is:

When the car passes over uneven roads, the chassis will rattle. The balance bar is also called the anti-roll bar and the stabilizer bar, and there are two buckles on the balance bar, and the buckle is the rubber sleeve of the balance bar. Cold in winter and hot in summer, coupled with the erosion of soil and dust, it will become harder and harder after aging.

Check whether the connection between the chassis parts is tight, when the chassis bolts and screws are loose, they should be fastened or replaced in time, if you need to drive often on bumpy roads, then you can check the chassis fasteners regularly.

1. Clean and scrub the chassis of the car regularly.

The automobile chassis is the closest part of the automobile parts to the ground, and in the process of driving, it often falls into the mud and sand, causing the automobile chassis to be stained with mud, garbage and other attachments. These pollutants will enter the chassis of the car, causing the pollution of the transmission system and other components of the car chassis, causing the friction between the parts to increase, accelerating the loss of parts, greatly shortening the service life of the car, and in rainy and snowy weather, the components in the rain and snow may corrode the parts of the chassis to a certain extent.

Therefore, we need to wash the chassis of the car regularly, and thoroughly clean the chassis frame, steering arm, steering tie rod, rotating shaft, tire fender and other positions after rain and snow to prevent the above parts from rusting.

2. Check the operation of each part of the vehicle chassis.

In the normal daily driving process of the vehicle, there will be no abnormal noise, and when there is a problem with the car bottom Mu Xun disk, there will be a more abnormal and huge sound, and the operation and control of the car will also be inconvenient, for this reason, the operation of the above-mentioned parts needs to be analyzed in the process of driving the car, and the problem is found to be repaired in time to the maintenance plant.

3. Inspection and maintenance of automobile shock absorbers.

The shock absorber of the car is also installed in the chassis of the car, the shock absorber of the car needs to be maintained daily, the working state of the shock absorber will affect the stability of the car during driving, if the shock absorber of the car is in good working condition, it can directly affect the service life of other parts of the car, thereby increasing the economy of the use of the car.

The diagnosis of common faults in automobile chassis can be divided into the following aspects: Analysis of the causes of steering wheel shake when driving at high speed: When the car is driving at high speed or at a certain high speed, the driving is unstable, shaking the head, and the steering wheel is shaking, which may have the following reasons:

1.The front wheel alignment angle is misaligned or the toe is too large. 2.

Dynamic imbalance is caused by low front tire pressure, tire maintenance, abnormal wear and tear. 3.The abnormal noise of the chassis preparation may be the lack of lubrication in the positions of the pump bearing and the generator bearing, which makes the mating gap between the parts small when the car is cooled, and the abnormal noise will be generated when the rotating parts are slid due to the application of large pressure.

4.Belts and pulleys may slip and may also affect abnormal sounds. How to judge that there is an abnormal sound on the chassis of a car:

1.Tyre noise and rear axle noise recognition, tyre noise varies with road surface, but rear axle noise does not. When the car's speed drops below 48 km/h, the rear axle noise disappears and the tire noise continues.

When the car is driving and coasting, the tire noise is the same, but the rear axle noise is different. 2.According to the distinction between the abnormal noise of the automobile wheel bearing and the noise of the rear axle, when the car is coasting and the speed exceeds 48km h, the excited noise of the rear wheel bearing is rarely heard, unless the rear axle shaft is seriously damaged.

When the car is coasting or in neutral, the broken rear wheel bearings make a "roar" sound and the peeled rear wheel bearings make a "rustle" sound. 3.The bearing of the reducer generally emits a piercing "bang" or "bang" sound, and the sound rhythm is stable and changes with the change of vehicle speed.

The sound of the front bearing of the reducer cone active imitation lead sliding gear is loud when the car is coasting, and the sound of the rear bearing is loud when driving.