The chassis is bad and noisy, as long as you are not afraid of trouble, there is nothing that cannot

Diagnosing car breakdowns, tell the truth.

Loose chassis generally occurs in older cars, when the car is driving in bad road conditions, the steering wheel will feel unstable, the bottom of the car will also come out of the abnormal sound, usually the old driver can feel the overall a little loose, when encountering such a situation, it means that the chassis may be loose, and the reasons for this situation are divided into several, only by understanding the reasons, can we better prevent this problem from happening.

The first reason is the aging of rubber parts, we all know that the elasticity of rubber is particularly good, which can buffer the friction between parts and reduce noise at the same time. However, this kind of thing has a lifespan, and it will age after a long time, and the elasticity is not as good as before, so the buffering capacity will decrease, resulting in abnormal noise in each part, so it is necessary to check these rubber parts regularly and replace them in time.

The second possibility is the reason for the shock absorber, the main role of this part is to inhibit **, when the car is driving in the dustpan section, it will have an impact with the road surface, and the shock absorber can well ensure the smoothness of the car, if the shock absorber is damaged, there will be a scoop phenomenon, so that the chassis is loose, so usually check the shock absorber, if there is a leakage to repair in time.

The third is the clearance of the parts, that is to say, the ball head may be loose, this part is like the joint of the human body, if the ball head is loose, there will be a large gap between the lever and other connected parts, if the gap is too large, when crossing some dustpan roads, the screws between the subframe and the suspension will be loose, then the chassis will become loose, so usually check these two parts.

Thank you for adopting.

When you walk to a bad road, the abnormal sound of stepping on the brakes disappears, and as soon as the brakes are released, the sound of gurgling will come immediately! Draw conclusions! It may be a problem with the brake guide cutting, it may be loose, go back and claim it, replace it with a new one, fortunately there is a stock, the master will directly bring it to change, and it will be done in half an hour!

Removed the two front wheels and took the brake calipers apart, the problem was that there was such a small thing in the calipers, four in total, two on each side! After changing the outfit and going to the original cement floor to test the car, the abnormal noise disappeared, haha, finally much cooler, and I won't feel that the chassis has a loose feeling!

Check to see if there is a problem. Go fix it?

1. When the chassis is clattering on a bad road, first check the shock absorber of the car, according to the position of the sound, judge which position it is, when the car is parked on the flat ground, the distance between the car and the ground is too small, which is not conducive to checking the fault, it is best to go to the 4S shop or repair shop to lift the vehicle through the lift, check whether the shock absorber has a gap, and whether the suspension is faulty.

2. The second situation is that the gap between the ball joints of the steering tie rod is too large, in addition to the clanging sound in the bumpy road, there may also be abnormal noise when turning. In serious cases, there will be steering wheel shake, tires eating tires, etc., you should go to the 4S shop or repair shop in time to replace the ball joint.

3. The third situation is that the gap between the lower arm is too large, or the lower arm is loose. The lower arm is an important part of maintaining the elasticity of the body and is part of the suspension of the car. The lower arm connects the axle to the frame and cushions the impact of the car on bumpy roads.

Once the lower arm fails, it should be replaced in time at a 4S shop or repair shop.

First: Let's get to know the suspension components first. Mark them with different colors.

Red is the small balance bar (often referred to as the dog bone), green is the ball head of the steering gear bar, yellow is the lower swing arm (often called the triangle arm), and blue is the brake caliper retaining pin. The above-mentioned ball joints have two common features. They all have dustproof rubber covers.

Once damaged and deteriorated, they emit an abnormal "squeak" sound. How can you tell if a suspension ball joint is damaged? First observe whether the dust cap of each ball head is damaged.

A damaged dust cover does not mean that the ball head will make an unusual sound, but it can be determined that the replacement time is not far off.

The inspection method works well. Grasp the ball head with your hand, or use a wrench to shake the ball head up and down。If it is not loose, the ball joint is intact.

Grasp the bottom of the tire with your hands, then move the tire up and down, left and right. The caliper needs to be applied to listen carefully, or the caliper is removed to observe the state of wear. Equalizer bars are most susceptible to abnormal sounds in suspension components, and some models need to be replaced in about two years.

Sometimes, there is a "squeak" sound when we point out the direction on the spot. Replacing a pair is about 50-100 RMB. The Elantra lower arm ball joints can be replaced individually.

This is a better design, and the cost of replacing one is about 40 yuan. Vehicles such as vans require the entire lower arm to be replaced. The steering wheel linkage ball head controls the turning of the vehicle, and the damage to the ball head is noticeable when we hit the direction.

Balance stabilizer bar, a small balance lever connected at both ends mainly controls the wheels to ensure the stability of the vehicle when the wheels turn unevenly。The green mark is the balance bar opening rubber. Everyone knows that rubber starts to age, harden and lose its elasticity after a period of use.

The rubber sleeve of the opening was damaged, especially when passing through speed bumps in winter, and the vehicle made a "gurgling" sound, like the sound of lifting a sedan chair in ancient times. Abnormal suspension noise also includes: steering gear connection cross joints, steering strings, abnormal noise of shock absorbers, rubber on the top of shock absorbers, and abnormal noise of pressure bearings, but these places are more troublesome to check.

Summary: The abnormal noise of the suspension will directly affect the driving quality of the vehicle and the driver's mood. If you are an obsessive-compulsive person.

As long as there is an abnormal sound in the vehicle, it must be completely resolved. For example, even if there are stones, stops, and snaps on the tires, it is necessary to address the abnormal sounds in the control unit of this van**, such as the abnormal sound of the glass rubber strip and the abnormal sound of the door panel. The suspension time of the chassis will be slightly deformed and tightened, which can release the tightening force and solve some unusual noises that cannot be detected.

First of all, it is necessary to determine whether it is only a sound that will be heard when driving a bad road, and then go to the repair shop to see if it is due to the damage of the chassis parts caused by a long time of bad driving, if it is the abnormal noise caused by the damage of the chassis parts can be solved, if it is just a lot of noise, you can consider changing the tire, or increase the sound insulation cotton.

1. Constant velocity universal joint abnormal sound When the transmission shaft turns around, you hear a metal "click" sound, check whether the cage dust jacket is damaged.

2. Bearing abnormal noise bearing damage is generally the damage of bearing beads and tracks, with the rotation of the tire, the damaged bearing should have different sounds at different speeds, when you feel that your car is not as quiet as it used to be, even if you are driving on a very flat road, you can make the speed reach the noise when changing to neutral sliding, at this time the engine is running at idle speed, if the noise is gone.

Generally, when the car crosses the bad road, the abnormal sound of the chassis is shock absorption or steering machine, and it may also be a problem with the engine guard, which should be checked by the car repair shop or 4S shop in time.

Summary. Dear, hello I'm honored to answer for you this bad road chassis this intention, this is generally the ball head damage caused by this kind of problem, the solution is to jack the vehicle up and shake the tire, if the tire has a gap, this left and right shaking tire has a gap, indicating that the swing arm ball head damage causes this problem. Directly replace this swing arm ball head, pro generally replace this swing arm ball head ** in about 150 180 yuan Please take a look at the above question answer, I hope to help you, I wish you a happy life, all the best, everything goes well.

Dear, hello I'm honored to answer for you this bad road chassis this intention, this is generally the ball head damage caused by this kind of problem, the solution is to put the Lu Qiao this vehicle up and shake the tire, if the tire has a gap, this left and right shaking tire has a gap, indicating that the swing arm ball head damage is caused by this problem. Directly read the boo to replace this swing arm ball head, pro General replacement of this swing arm ball head ** in 150 180 yuan or so Please take a look at the above question answer, I hope to help you, I wish you a happy life, all the best, everything goes well.

In this case, the ball joint of the chassis key, swing arm, is damaged, or the shock absorber top glue.

Damage to planar bearings causes this problem.

That's all for these two. A little more, dear.

The car is rear-wheel drive, the sound is the front ring, and all the trolley ball joints have seen no problem.

There is no problem with this top glue.

You can see that this top foot is protruding too much.

It's broken. It's broken.

I saw that the rubber sleeve was broken.

Is it broken here.

The rift is up. I didn't look carefully, I took it with my mobile phone, and I couldn't see it directly with my eyes, can I just change the top glue, yes.

I looked like it was broken.

I'm marking this.

Place. I look at it and there is damage.

Yes, I'll take a look at it tomorrow, do you know if you can change it in Kunming, and how many meters will be replaced by tens of thousands of yuan in the car.

The repair station can be replaced.

This replacement is not expensive.

Around 150.

Hundreds of dollars. Pits are available pro.

I asked a few of them, and they only replaced the shock assembly.

Again, ask for the ones that can be replaced separately.

1. Constant velocity universal joint abnormal sound: Constant velocity universal joint is commonly known as ball cage, and its main function is to transmit power and complete steering. If the constant velocity universal joint is seriously worn, and the vehicle turns while driving, there is an abnormal sound similar to "rattle and rattle", you only need to confirm which side the abnormal noise is, and then replace the constant velocity universal joint to solve it.

2. Abnormal sound of wheel bearing: The function of wheel bearing is to connect the vehicle and the tire. No matter how big the tire is, the connection between the vehicle and the tire is by a small wheel bearing, if the wheel bearing is damaged, it will cause the tire to deviate, or even the tire to fall off.

When the vehicle is driving, it emits a continuous abnormal sound similar to "buzzing", which is the alarm of the wheel bearing, and the faster the speed, the stronger the sound, if it is slightly damaged, there will be an abnormal sound when the direction is generally tapped.

3. Abnormal sound of exhaust pipe: abnormal sound of exhaust pipe is generally caused by rupture or leakage of exhaust pipe, and there will be "poof" noise after the vehicle starts. It may also be caused by the damage or blockage of the three-way catalytic converter, which is used to reduce the noise while purifying the exhaust gas.

The above is the introduction of the abnormal sound of the car chassis, I hope it will help you.

Learn to distinguish between abnormal noises that are reasonable sounds.

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 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.