1. Check the shell
Although the shell is not a shock absorbing part of a shock absorber, it is a supporting part that conforms to it for a long time, so safety is of utmost importance. The shell strength of a good quality automobile shock absorber must meet the requirements. We can make a simple judgment from the thickness. When we buy shock absorbers, we can't just pay attention to the low price, because some shock absorber manufacturers may use thinner shells in order to reduce costs. The service life of such a car shock absorber will be relatively short.
2. Check the spring
The spring is the main damping component. We can check from both ends when we buy. Springs that are not tightly ground will affect the stability of the shock absorber. Another important indicator is the compression of the spring. Sufficient compression can ensure that the natural vibration frequency of the shock absorber is low enough to achieve the shock absorption effect.
3. Check the surface treatment
The workmanship of a good quality car shock absorber must be good. We can see from the surface treatment whether the workmanship is fine, such as whether the welding is smooth, whether the paint is peeling, etc.