Shake the car up and down hard, the rear suspension squeaks loudly, what s going on?

1. The maintenance of the suspension system is mainly to check the installation and function of each component, and the components are required not to have defects such as looseness, deformation, excessive wear, excessive clearance, and weakened elasticity; In particular, the deformation of the suspension arm and the wear of the bushing and ball joint will make the wheel alignment inaccurate and prone to failure. The cost of maintenance varies greatly depending on the model, region, and level of repair shops, etc., and the specific situation shall prevail.

Second, the fault phenomenon.

1. The connecting pin (rod) of the shock absorber falls off or the rubber bushing (cushion) is worn and cracked.

2. The oil volume of the shock absorber is insufficient or there is air.

3. Poor sealing of shock absorber valves.

4. The piston and cylinder barrel of the shock absorber are worn excessively and loose.

3. Fault diagnosis and elimination.

1. Check whether the connecting pins (rods), rubber liners and connecting holes of the shock absorber are damaged, falling off or cracked, and if so, they should be repaired or replaced in time.

2. Check whether the shock absorber has oil leakage and obsolete oil leakage traces.

3. Press the bumper of the car hard, the hand is loose, if the body can have 2 or 3 jumps, it means that the shock absorber is good, otherwise, the fault is inside the shock absorber, and it should be removed for maintenance.

4. Wheel alignment: check the wheel alignment to make the positioning parameters within the specified range.

3. Miscellaneous. 1. Suspension springs.

Spring wear check: cracks, wear or damage.

Elasticity check. Spring installation: the installation position and direction are correct, and the clearance meets the regulations.

2. The vehicle is overloaded or overspeeding on uneven roads, or the speed is too fast when turning, and the load suddenly increases.

When the vehicle is used under the condition of long-term overload or uneven loading, the load of the suspension spring is not released according to the regulations when the vehicle is sealed.

If the maintenance is not timely, the lubrication between the suspension springs is poor or there is no lubrication at all, which reduces the relative displacement capacity between the suspension spring plates, resulting in a decrease in bearing capacity and breakage.

The U-bolt is loose, and the load is concentrated on the top few pieces of the leaf spring, which are prone to breakage.

The curvature of the new suspension spring blades replaced is different from the curvature of the original.

The car has too much emergency braking (especially in the case of good front braking and poor rear braking), or when going downhill with full load, the emergency braking is used to move the car load forward, and the front suspension spring is suddenly subjected to additional load, resulting in the suspension spring.

One or two pieces are broken.

3. Suspension rods.

Pry the fixing frames of each suspension arm, support bar, stabilizer bar and control bar, check the clearance in all directions, and re-tighten or transverse the bushing if it is too large.

For the strut suspension, you can use the hand to push and pull the top of the wheel to check whether the upper bracket is loose or damaged.

Check the suspension arms for deformation.

Check the installation connections.

Check the gap of the ball joint joint, if the gap is too large and the wear is serious, it should be replaced.

4. a shock absorber.

Check that the shock absorber should be free of oil leakage, deformation and damage, otherwise it should be replaced.

Check the installation of the shock absorber.

Check the working condition of the shock absorber: press the body with your hands.

You put the handbrake down and try it.

When the suspension system is abnormal, the following steps are used to judge:

1. Check the tire pressure; High pressure will cause abnormal noise;

2. Check whether there is abnormal damage or loose nuts at the connection between the suspension system and the upper and lower ends of the vehicle; Any loose connection will cause abnormal noise;

3. Whether the self-locking nut at the upper part of the piston connecting rod is tightened, and whether the bolt and nut connected at the lower end are tightened; Any loose connection will cause abnormal noise;

4. Whether there is damage to each part of the sliding column.

5. Inspect the shock absorber and compress the shock absorber by hand to listen to whether there is any abnormal noise.

You don't pull the handbrake to try, if only the handbrake rings, it's normal.

It may be that the suspension is loose, it is recommended that you go to the 4S shop to have a look, they will help you do a full car inspection for free.

Hard suspension? Under what circumstances is there an abnormal noise?

1. Check the tire pressure; High pressure will cause abnormal noise, which can be solved by adjusting it to the specified value;

2. Check whether there is abnormal damage or loose nuts at the connection of the upper and lower ends of the suspension body; Any loose connection will cause abnormal noise, which can be solved after tightening;

3. Whether the self-locking nut on the upper part of the piston connecting rod of the shock absorber is tightened, and whether the bolts and nuts connected at the lower end are tightened. Any loose connection will also cause abnormal noise; It can be solved after fastening;

4. Whether there is damage to each part of the strul, check whether the vibration isolation block, buffer block, spring upper and lower cushions, pressure bearings, etc. are damaged, or whether other parts are damaged, and the damage is found to be replaced;

5. Conduct pressure test on the shock absorber, press the body or compress the shock absorber by hand after disassembling it to listen to whether there is any abnormal sound, and replace it if there is a problem;

This could be the sound of the rear wheel shock absorber, and it could be caused by the aging of the rear wheel shock absorber rubber. The solution to this problem is very simple, and it is more important to replace the aging shock absorber rubber. Where the shock absorber is connected to the body, there is cushioning rubber, which can improve the comfort of the car.

Rubber products will age after being closed for a long time. Rubber hardens as it ages, and it creaks when it hardens.

All rubber products in the world will age after long-term use, so rubber products need to be replaced regularly.

The rubber products on the car include tires, sealing strips, chassis bushings, shock absorber cushion rubber, etc.

When replacing the cushioning rubber of the shock absorber, it is necessary to remove the shock absorber for all four wheels.

When installing the shock absorber, it is necessary to use a special torque wrench to tighten the screws according to the specified torque.

And after the shock absorber is installed, you also need to do a four-wheel alignment, otherwise it may cause the car tires to wear or deviate.

When doing four-wheel alignment, you need to go to a shop with professional equipment and a special transportation technician.

When you usually use the car, if you find that the car is running off or the tires are partially worn, you should also do four-wheel alignment.

When replacing the shock absorber cushioning rubber, be sure to choose the original parts and go to a professional organization to replace them.

The creaking of the rear shock absorber of the car is caused by the abnormality of the shock absorber and the shock absorber spring. When the shock absorber of the vehicle is damaged, due to the coordination between the various parts of the shock absorber, it will make a creaking sound when working on bumpy roads.

The creak of the rear shock absorber of the car can be applied with some lubricating oil to the rear shock absorber, and the shock absorber rubber sleeve can also be replaced.

Maintenance of shock absorbers.

The working quality of the shock absorber will directly affect the smoothness of the car and the life of other parts, so the shock absorber should always be in good working condition. The car stops after driving 10km on the road surface with poor road conditions, and touches the shock absorber shell with your hands, if it is not hot enough, it means that there is no resistance inside the shock absorber, and the shock absorber does not work.

At this time, you can add appropriate lubricating oil, and then test, if the shell is hot, it is a lack of oil inside the shock absorber, and the oil should be added enough, otherwise, the shock absorber fails. Press the bumper firmly and then let go, if the car has 2-3 jumps, the shock absorber is working well. When the car is driving slowly and braking urgently, if the car vibrates violently, it means that there is a problem with the shock absorber.