Manwosi expert: Do automotive shock absorbers really have service limits?

Many parts of the car look insignificant. If they are not replaced in time for a long time, it is likely to cause huge safety hazards. Today, manwosi Xiaobian will talk about shock absorbers first.

Shock absorber refers to the "tube" in the middle of the whole shock absorber. Its function is to restrain the excess rebound generated by the spring during operation and slow down the excess vibration. Shock absorber is the product of the combination of shock absorber and spring.

As a member of the shock absorber system, if the shock absorber is damaged, its safety will be greatly reduced. But does this mean that the shock absorber of the car must be replaced after 100000 kilometers?

Generally speaking, the shock absorber needs to be checked every 100000 km, but different models and driving habits of car owners will cause differences between cars, so 100000 km is not the standard for replacing car shock absorbers.

How to check whether the shock absorber of the car is damaged?

1. Check whether the shock absorber leaks oil.

The outer surface of ordinary shock absorber is dry and clean. If the oil seeps, the hydraulic oil in the shock absorber leaks from the upper part of the piston rod. In this case, the shock absorber basically fails.

It's easy to judge whether the shock absorber leaks oil. If possible, it's best to lift the car with an elevator. If not, you can take a flashlight and look at it on the ground. If there are signs of oil leakage, it means that the problem is not very big and the car can drive for a while.

(the front needs to be supported by a jack. It's better to put a few more bricks on the side to pay attention to safety)

Because with the increase of vehicle age, the oil seal of the shock absorber will naturally age over time, resulting in loose sealing and some oil leakage problems. It is OK to open it normally. Remember to use the weight lifting machine of the 4S shop / repair shop to lift it up during maintenance. Just observe it more.

But! If you observe that the shock absorber is full of oil, especially if you find oil droplets at the bottom of the shock absorber, then your shock absorber needs to be replaced. It has hovered on the edge of failure, and it is likely that the oil seal has been completely reimbursed, or there are cracks in the barrel body.

2. When the car passes through the rough road or deceleration belt, the wheel makes a "bang", indicating that the shock absorber on the wheel is invalid or invalid.

3. When the car turns, the roll of the car body increases significantly, and even sideslip occurs in serious cases. This is mainly because the damping force of the shock absorber is too small to effectively inhibit the compression of the spring.

4. After driving on the rugged road for a period of time, we feel the temperature of the shock absorber shell with our hands. Under normal conditions, the shock absorber housing is warm. If the shock absorber housing is cold, it means that the shock absorber has been damaged.

How does the car feel when the shock absorber is damaged?

First of all, you will feel that the whole vehicle has become very hard, and the feeling of flickering no longer exists; When passing the deceleration belt, the car will have extra bounce, just like a trampoline.

The reason is that there is not enough oil in the shock absorber to meet its working conditions, and the effect of slow stretching cannot be achieved through the extrusion of oil. Only the spring is working. The feeling is to turn your car into a "lively rabbit".

What should I pay attention to when replacing the shock absorber?

1. Replace the shock absorber of professional brand.

Replacing non brand shock absorbers at will may cause problems such as vehicle braking deviation, rapid acceleration deviation and inaccurate four-wheel positioning. Therefore, we must choose professional brand shock absorbers. Manworth shock absorbers are of excellent quality and your first choice.

2. Generally, the coaxial shock absorbers on both wheels should be replaced at the same time.

When replacing a damaged shock absorber, the coaxial shock absorber on both wheels should be replaced at the same time. The different damping effects of the two shock absorbers will lead to the inconsistency between the left and right steering handles and the body roll, which will not only affect the ride comfort, but also seriously affect the handling of the vehicle, making the vehicle difficult to control.

Do you need four-wheel alignment after replacing the new shock absorber? Of course, it is necessary ~ because the pull rod, ball joint and other components need to be removed during replacement, and there will be a slight deviation in the installation of the new shock absorber, so it is necessary to adjust the front wheel camber, front wheel toe in, kingpin caster and kingpin inclination through four-wheel alignment.

If the rear shock absorber is suspended independently, it is necessary to focus on four-wheel alignment adjustment; The non independent suspension is not needed, because the adjustment difference of the non independent suspension is not too much, and the room for adjustment is relatively small. Anyway, it's best to do four-wheel alignment.