How to Determine the Quality of Shock Absorbers?
2 Answers
Shock absorber performance can be evaluated based on four aspects: temperature inspection, oil leakage observation, ride feel, and individual testing. Shock absorbers are vulnerable components during vehicle use, and their quality directly affects the driving smoothness and the lifespan of other mechanical parts. Therefore, it is essential to keep shock absorbers in good working condition. Below are detailed methods for evaluation: 1. Temperature Inspection: After driving the vehicle for 10 kilometers on rough road conditions, stop and touch the shock absorber housing. If it is not sufficiently hot, it indicates that there is no internal resistance, meaning the shock absorber is not functioning. 2. Oil Leakage Observation: During operation, high-temperature oil vapor from the shock absorber often adheres to the cylinder wall, and road dust accumulates on it, forming a layer of sludge. This is normal and not caused by oil leakage. However, if there is not only sludge but also oil stains or droplets on the cylinder wall and lower mounting ring, it indicates oil leakage. 3. Ride Feel: Normally, when the vehicle passes over a bump or pothole at a moderate speed, the body will inevitably experience jolts and vibrations. If the shock absorber is faulty or the springs are too soft, the amplitude of the vibrations will be larger. If the vibrations persist for an extended period, it suggests that the shock absorber's damping performance has degraded or failed. Otherwise, it is functioning normally. 4. Individual Testing: Remove the shock absorber from the vehicle, stand it upright, and clamp the lower connecting ring in a vise. Pull and press the shock absorber rod several times. There should be stable resistance, with the resistance during upward pull being greater than during downward press. If the resistance is unstable or absent, it may indicate insufficient oil inside the shock absorber or damaged valve components, requiring repair or replacement.
I've driven many cars, and if the shock absorbers are broken, you can clearly feel the car bouncing badly while driving, just like driving on a washboard. Especially when going over speed bumps or rough roads, the car body doesn't absorb the shocks gradually but bounces up and down stiffly. After a while, your hands even go numb. When you get out to check, press down on the four corners of the car body, like the trunk or hood area. Normally, it should rebound once and stabilize. If it wobbles back and forth a few times or feels loose, then there's a problem with the shock absorbers. Check the shock absorber cylinder for any oil stains or fluid leaks—leaking oil is the most common issue. Over time, dust accumulates and looks like a layer of mud. Also, pay attention to any unusual sounds while driving, like squeaking or thumping noises, as these are warning signs. Don't delay regular maintenance; check the tires and shock absorbers every six months. Addressing small issues early can save you a lot on repair costs, and don't wait until there's danger on the highway.
