There are several reasons for abnormal sound of pneumatic butterfly valve.
The rubber sleeve of the stabilizer bar is damaged, or the connecting ball head has clearance. The pneumatic butterfly valve leaks oil or there is clearance between the upper and lower parts when the pneumatic butterfly valve is disassembled.
In brief, wear and aging exist without being damaged by strong external force, or there is a gap due to long bumping time.
Next, let's learn about several inspection methods.
The first and most direct thing is listening. Everyone can listen to the voice. When driving at low speed, if the tire passes through the bulge, there will be a slight vibration accompanied by a sound of 悾悾. And the sound is very dull. At this time, we can use experience to judge which suspension is emitting, and then go further to check whether there is any damage. If there is no damage, don't move. Go to the repair shop to check.
The next step is to check whether there is oil leakage in the pneumatic butterfly valve. If it doesn't rain or wash the car, check whether there is oil on the pneumatic butterfly valve housing or the dust boot. This is obvious and can be seen directly.
The other thing is to touch it by hand, which is also relatively simple. Press it on the suspension, such as the front and rear fenders. If there is a fault, the pneumatic butterfly valve will be hard, which is generally caused by the long-term oil leakage of the pneumatic butterfly valve, and also needs to be handled.