The general shock absorber has the following failure manifestations after damage:

1. Oil leakage from the shock absorber. The outer surface of the normal shock absorber is dry and clean. If there is oil seepage, it means that the hydraulic oil inside the shock absorber has escaped from the upper part of the piston rod. In this case, the shock absorber has basically failed;

2. When the car goes over bumpy roads or speed bumps, a certain wheel makes a "bumping" noise, indicating that the shock absorber on this wheel has poor damping effect or failure;

3. The car obviously feels that the body roll increases when cornering, and even side slip occurs in severe cases. This is mainly because the damping force of the shock absorber is too small to effectively suppress the compression of the spring;

4. After the car has been driving on rough roads for a period of time, touch each shock absorber shell by hand to feel the temperature of the shock absorber. Normally, the shock absorber shell is warm, if a certain shock absorber shell is cold , Indicating that the shock absorber has been damaged;

5. When the car is in a stopped state, when the corner of the car body is pressed down and released, the body will rebound under the force of the spring. If it stabilizes soon after the rebound, it indicates that the shock absorber is good; Stopping after the second time indicates that the damping effect of the shock absorber is a bit poor.

Extended information:
The function of automobile shock absorber:

The shock absorber on the car is an important component in the car suspension system. Its function is to inhibit the spring from absorbing the vibration deformation and the shock when the spring rebounds, and absorb the impact force from the road surface. It directly affects the ride comfort and maneuverability of the car, which in turn affects our driving safety.

When a car is driving on a rough and uneven road, the wheels are subjected to the impact of the ground and are transmitted to the body through the elastic element spring in the suspension system, thereby triggering the vibration of the body. In this process, the spring continuously expands and compresses, and oscillates under the action of inertia.

And in this process, due to the constant changes in the adhesion between the wheels and the ground, the wheels will even leave the ground and lose the adhesion, and the car will be in danger of losing control. This is the impact of the shock absorber on the car's handling. The function of the shock absorber is to delay the expansion and compression speed of the spring, and absorb the shock caused by this, so that the spring becomes stable quickly after deformation.

If there is no shock absorber, the spring will be compressed and rebound again after rebounding, and the car body will rebound many times before stabilizing, resulting in uncomfortable ride and poor car handling. Therefore, the shock absorber is used to dampen the spring of the car suspension when it rebounds. It is to dampen the spring, not the body.