What to Do When the Rear Shock Absorber Makes Noise on Bumpy Roads?
2 Answers
Solutions for rear shock absorber noise on bumpy roads include: 1. Apply lubricant to the rear shock absorber; 2. Replace the shock absorber rubber bushing; 3. Install a new shock absorber. The functions of a shock absorber are: 1. To buffer the movement of the vehicle's center of gravity and conserve energy; 2. To reduce air resistance and minimize the impact of changes in the vehicle's center of gravity on the tires. The principle of a shock absorber is: When relative motion occurs between the frame and axle due to vibration, the piston inside the shock absorber moves up and down, causing the oil in the shock absorber chamber to repeatedly flow from one chamber to another through different orifices. The friction between the orifice walls and the oil, as well as the internal friction between oil molecules, creates resistance to vibration, converting the vehicle's vibration energy into heat energy of the oil, which is then absorbed by the shock absorber and dissipated into the atmosphere.
I've driven for several years, and rear shock absorber rattling over bumps is no small issue—it needs thorough investigation. The most common causes are usually aging shock absorbers or spring problems. Just last week, my friend’s car made a clunking noise over potholes—turned out the shock oil had leaked completely and the bushings were worn out. These parts tend to loosen with prolonged use. You can try checking yourself: park the car firmly, then press down on the rear wheel’s upper body. If the rebound is sluggish or accompanied by noise, the shock might be faulty. Alternatively, listen to whether the sound comes from vertical or lateral movement to preliminarily determine if it’s the whole system or a single component. Remember, don’t push through long drives—severe rattling could damage the frame or even lead to loss of control. Visit a repair shop early and have them inspect it carefully with tools; replacing parts won’t cost much. For routine maintenance, check the suspension every 10,000 km to prevent many headaches.
