Do I Need to Replace the Springs When Changing Shock Absorbers?
2 Answers
Replacing shock absorbers does not necessarily require replacing the springs. If the car shakes severely, it is usually not related to the springs, as springs primarily serve a cushioning function. A faulty shock absorber can affect the car's balance, but replacing them in pairs (left and right) will not cause issues. Unusual noises are typically due to aging or wear of the shock absorber buffer rubber. Below is more information about shock absorbers: 1. Shock absorbers are not designed to support the vehicle's weight but to dampen the oscillations after the springs absorb shocks and to absorb energy from road impacts. In a car with faulty shock absorbers, the vehicle will continue to bounce after passing over bumps or uneven surfaces, and the shock absorbers are meant to control this bouncing. 2. Without shock absorbers, the rebound of the springs cannot be controlled, leading to severe bouncing when driving on rough roads. During turns, the up-and-down motion of the springs can also cause loss of tire grip and traction. The ideal scenario is to use shock absorbers to limit the spring's rebound to a single cycle.
Having been in the auto repair industry for so long, I've been asked this question quite often. The shock absorber is primarily responsible for controlling vibrations and bumps, while the spring supports the entire weight of the vehicle. When replacing shock absorbers, there's no need to change the springs if they're still in good condition—such as in new cars or when the driver is generally cautious. However, springs in older cars often suffer from fatigue and deformation, especially if the car has been driven in mountainous or rough terrain. Ignoring the springs in such cases can increase the burden on the shock absorbers, leading to reduced comfort and even affecting balance. I usually recommend getting the springs inspected at a repair shop first, checking their height and looking for any cracks. If you really want to save money, you can just replace the shocks, but you'll need to keep an eye out for potential issues later on. Remember, the entire suspension system needs to work in harmony for a safe and comfortable ride.
