How to solve the problem of abnormal noise in the chassis when driving on a bad road?

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.

Hello! Glad for your question.

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.

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. Hello, I'm glad to answer for you, the car chassis is good to open the road without abnormal noise, and the answer is as follows: dear, hello!

You can go to the after-sales service to check whether the chassis is loose, or the exhaust pipe is loose, and whether the shock absorber has oil leakage and rubber sleeve damage.

There is no abnormal sound when the car chassis is on a good road, but there is an abnormal sound on a bad road.

Hello, I'm glad to answer for you, the car chassis is good to open the road without abnormal noise, and the answer is as follows: dear, hello! You can go to the after-sales service to focus on testing whether the chassis is loose, or the exhaust pipe is loose, and whether there is oil leakage and damage to the shock absorber and the rubber sleeve is damaged.

Hello dear! Generally, it is caused by shock absorber problems, loose parts, and failure of the front and rear axles. Abnormal noise can be reduced by installing a chassis guard plate and tightening the suspension connectors.

It is recommended to contact your local 4 S store for inspection and repair. Disc brake abnormal noise: when the vehicle branch is driving on the flat road at low speed, there is an intermittent and irregular "rattling" sound at the axle part, and the sound will be slightly aggravated when the speed increases, but there is no change when going up and down the slope and turning sharply; When driving on uneven roads, the sound is aggravated, and the sound of pressing the brake pedal with your foot is reduced or eliminated.

When stopping for inspection, you can hear an abnormal sound by rotating the wheels back and forth. This is due to the damage, deformation and falling off of the brake shoe support plate, vibration damping spring plate or guide plate of the disc brake brake, which increases the gap between the brake shoe and the brake caliper support frame, and makes a sound when it hits each other. You can go to the repair station to repair the deformed parts and replace the parts that have fallen off.

The reasons for the abnormal sound of the chassis when driving: 1. The abnormal sound is made when playing the direction, if it is not the sound of the friction between the tire and the ground, it is the sound caused by the damage of the outer cage, and the abnormal sound can be eliminated by replacing the outer cage; 2. The abnormal sound of the rear wheel is usually emitted at the connection between the rear axle and the shock absorber, and the screws at the connection between the rear axle and the shock absorber can be checked to see if they are loose and tightened; 3. When the car is driving, the chassis makes a creaking sound, which is the connection between the MacPherson suspension and the shock absorber, which can stop the car in a relatively quiet place After the ignition is turned off, the four shock absorbers are pressed with both hands, and the body part is pressed up and down to make the body shake, and the sound of which part can be heard in the process of shaking.

The following are the specific reasons for the abnormal noise of the vehicle chassis 1, the abnormal noise caused by the looseness and deformation of the chassis parts. 2. Abnormal noise of tire noise. Each transmission device, each connector, etc., and the front and rear wheel bearings may make a sound.

The following is a detailed introduction to the causes of abnormal noise on the chassis of the vehicle: 1. When driving on a bumpy road, if there is a gurgling sound, it means that the chassis suspension parts have a loose problem, and it is necessary to check the tie rod ball joint, lower arm ball joint, balance bar ball joint and rubber sleeve, shock absorber, pressure bearing and direction machine, if these positions are loose, this situation will occur. 2. During the installation, replacement, overhaul and other usual maintenance, the abnormal noise of the parts caused by the negligence and carelessness of the screws caused by human reasons, mutual interference or wrong position of the parts, reverse installation and other aspects.

The abnormal noise of some important safety components, such as the brake part, may be worn by the brake pads or the direct dry grinding abnormal sound of the disc to the limit, and the abnormal sound of the chassis caused by the lack of oil in the power steering.

This problem is mostly caused by the aging of chassis rubber parts, which can effectively buffer the vibration of the vehicle suspension when working. Therefore, if the rubber parts are damaged or aged, the vibration cannot be alleviated, and the noise during suspension work will be transmitted directly to the cabin, giving people the feeling that the chassis is very loose. Here's how to fix it:

1. Replace the shock absorber. The lubricating oil inside the shock absorber of the old car should leak about the same, and the rebound and compression function of the shock absorber will be greatly affected at this time, and replacing the shock absorber can effectively improve the driving quality. 2. Replace the lower swing arm.

The lower swing arm ball joint is the most easy place to wear, and when the swing arm ball head lacks lubrication for a long time, the wear of the lower swing arm ball head will become very serious, and the hem arm will become very large at this time. 3. Replace the rubber bushing. There are a lot of cushioned rubber bushings inside the vehicle chassis, and when the bushings are aging and cracking, the vehicle will have various chassis abnormal noises when driving.

The reasons for the knocking of the chassis when the car crosses the bad road are: 1. The screws inside the chassis are loose. 2. The joints of the suspension connecting rod parts are loose or worn.

3. The rubber sleeve of the balance bar is aging. 4. Brake system failure. 5. The shock absorber is loose.

The maintenance of the chassis includes: 1. Regularly check the oil of each assembly. 2. Replace worn brake pads in time.

The way to deal with the knocking sound of the chassis of the car passing through the bad road is: 1. Knock on the engine protection plate with your hand to check whether there is any loose and abnormal noise. 2. Check whether the small boom has been bumped or bruised.

3. Stand under the tire and push the tire up to check whether it is loose. 4. Check whether the shock absorbing spring is pushed up to the chassis.