I feel that the chassis suspension is relatively loose, and it is useful to change the suspension, r

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.

It's very loose in itself, and no matter how much you change it, it won't work.

Hello 1, it is recommended to go to the maintenance plant for maintenance, specifically find out the abnormal noise parts, and repair the "symptoms".

2. Automobile chassis.

In general, the "squeaky noise" should be called the squeak of the suspension system, which mostly comes from:

3. The connecting parts of the chassis are loose, fall off due to a long time or the tightness is too large (loose), and the gap is too large.

4. The connecting ball (connector) head is loose, the balance rod (sleeve) is deformed, or the buffer glue (block) is aging and falling off.

5. Abnormal tire pressure (too high or too low), dynamic balance.

It may affect the "abnormal noise", handling performance or tire noise from itself.

6. From shock absorbers.

In general, the shock absorber itself has very little abnormal noise, only when the shock absorber function fails, the condition deteriorates, the internal parts fall off and loose, the shock absorber ring rubber sleeve is loose, the internal oil shortage (hydraulic cylinder type) or oil leakage can cause abnormal noise. However, the "silky" sound generated by the oil when the shock absorber piston moves up and down should not be regarded as an "abnormal sound".

7. The "abnormal noise" caused by the swing (runout) rate of the buffer rubber block and the high-speed operation dynamic balance parts of other relevant parts

8. Human factors (operational errors), such as unreasonable assembly, different sizes of strength (tightness) during assembly, missing (missing) parts, etc.

9. The quality of accessories, one is the expiration of the service life of the accessories, and the other is the quality of the accessories.

10. The possibility of other reasons is not excluded.

11. If abnormal noise is found, it is recommended to overhaul it in time to ensure driving safety.

Yes, both.

The role of the top glue:

1.Its material is plastic and rubber, which plays the role of cushioning and shock absorption, that is to say, when you pass some speed bumps, he will lift your car slightly upwards in your body after the tires are completely on the ground, and the comfort is special.

2.Sound insulation, tire and ground caused by the tire is also to complete the reduction, the tire can be bumpy when the ground can reduce the direct impact force on the car.

The engine has four brackets connected to the frame or the ground, which are commonly called engine feet, and the brackets connecting the engine and the frame or the ground have a rubber block or rubber ring, which is the engine foot rubber.

There must be, or the talk of comfort will shake you apart.

Regarding the landlord's concern about "Are shock absorption and top glue together?" "Here's my personal opinion:

Yes, shock absorption is a must to have a top glue. The material of the top rubber is plastic sun Xun rubber, which plays the role of cushioning, shock absorption and sound insulation. That is, when you pass some speed bumps, he will lift your car slightly upwards after the tires are completely on the ground, which is particularly comfortable to drive.

Tyres can also reduce the direct impact on the car when they are bumped on the ground. Tire noise on the ground can also be mitigated by the hole.

If the shock-absorbing top glue is broken, the symptoms are as follows:

1. The comfort becomes poor, and there will be a knocking sound when passing the speed bump, and it is also particularly obvious;

2. The wear of the tires becomes larger, and the sound of booming can be heard in serious cases;

3. There will be a squeaky sound when hitting the direction in situ;

4. The direction is skewed, which means that when driving in a straight line, the steering wheel is crooked, and even if it is straight, it cannot go in a straight line.

Whether or not to replace the top rubber shock absorber depends on whether the top rubber and flat bearing are damaged. If there is no damage, you just need to replace the shock absorber. If the top rubber of the shock absorber is aging, the top rubber must be replaced together when replacing the shock absorber, otherwise it will directly affect the effect of replacing the shock absorber.

The method of judging the reliability of the rear shock absorber of the vehicle: put the vehicle in a flat place, press down on the trunk with your hand (even when the trunk lid of a tall SUV is open), and then release it, jump 2-3 times, ** after the vehicle stops, it is considered normal.

How to judge the rear shock absorber of a vehicle: Place the vehicle on a flat place, press the bumper firmly (or press the front), and release. If the vehicle beats **2 3 times, the shock absorber is working well.

When driving at low speeds, the car brakes suddenly and suddenly. If you find that the car shakes badly, the human body feels uncomfortable, and the possibility of damage to the shock absorber is very high. After driving about 10 km on a road with poor road conditions, stop and touch the shock absorber housing with your hand.

If you feel that the temperature of the case does not have a certain amount of heat, or it is always cold, it means that there is no resistance inside the shock absorber and the shock absorber is not working properly.

Whether the top rubber needs to be changed depends on whether the top rubber and the plane bearing are damaged, and if there is no damage, only the shock absorber needs to be replaced. If the top rubber of the shock absorber is aging, the top rubber must be replaced together when replacing the shock absorber, otherwise it will directly affect the effect of the new shock absorber.

How to judge the reliability of the rear shock absorber of the vehicle: Put the car on a flat place, press down on the trunk with your hand (also when the trunk lid of a tall SUV is opened) and then release it, and the vehicle will be considered normal to stop after maintaining 2-3 jumps and rebound.

Vehicle rear shock absorber judgment method: put the car in a flat place, you can use force to press the bumper (press the front part of the car is also OK), and then release, if the car has 2 3 jumps rebound, it means that the shock absorber is working well. In the case of low-speed driving, if you suddenly brake suddenly, if you find that the car shakes more violently and the human body feels uncomfortable, then the possibility of shock absorber damage is very large.

The car stops after driving about 10km on the road surface with poor road conditions, and touches the shock absorber shell with your hands, if you feel that the shell temperature is not hot, or it is cold all the time, it means that there is no resistance inside the shock absorber, and the shock absorber is not working properly. (Photo by Li Linwei) @2019

If the top glue of the shock absorber is broken, it must be replaced. Then first of all, you have to lift the car, then remove the shock absorbing spring, and then remove the old one, replace it with a new one, and finally install it according to the original road.

The shock-absorbing top glue is broken and needs to be replaced, and the following is how to replace it:

1. Park the car on the flat ground before replacing, and prepare new top glue, jacks, soapy water, which can also be used to dilute the water with dish soap;

2. Use a jack to lift the body that needs to be replaced, and the spring is stretched, which is more convenient to replace. You can fully see that the shock absorber springs are on the line, and they don't need to be raised too high;

3. Spray soapy water to clean the spring, spray some soapy water lubrication on the new top glue, and fully clean the soapy water after installation to prevent the spring of the shock absorber of the automobile safety parts from rusting.

The damping top glue is generally caused by aging, basically every 40,000 kilometers need to be replaced, when the shock absorber is removed, directly replaced.

Photo by Shi Lili) @2019

Whether the shock absorption and top glue are integrated needs to be determined according to the model. In the case of aging or damage to the top rubber of the shock absorber, it needs to be replaced in time, and the damage or aging of the top rubber of the shock absorber will lead to abnormal noise of the shock absorber and affect the driving safety.

The symptoms of damper top rubber damage are as follows:

1. The comfort deteriorates and the sound of knock and knock is particularly obvious when cutting and speed bumps, and it is judged that there is a problem with shock absorption;

2. The fetal mockery becomes bigger, and the sound of booming can be heard in serious cases;

3. The direction becomes tilted, and the steering wheel is crooked when driving in a straight line, and it will not go straight when straightened;

4. Playing in the same direction will make a squeaky sound, which will cause the vehicle to deviate in serious cases.