Five warning signs of automobile suspension spring fatigue

1. Driving bumps are significantly aggravated
When the elasticity of automobile suspension springs decreases due to fatigue, its ability to buffer road impact is weakened. When the vehicle passes over speed bumps or bumpy roads, the body will transmit stronger vibrations to the car, and even a "hard-on-hard" impact will occur. This is because the yield strength of the spring is reduced and it cannot effectively absorb vibration energy.

2. Body tilt or height abnormality
If the suspension spring on one side of the car is deformed or broken due to fatigue, the vehicle may tilt with one side low and the other side high when parked. The body may also shake or deviate due to uneven spring support during driving, especially when turning, the roll amplitude increases abnormally.

3. Abnormal metal noise
Fatigue-fractured automobile suspension springs may make abnormal noises such as "crunching" and "clanging" due to friction or collision of metal fragments when bumping. In addition, the connecting parts (such as bushings) between the spring and the guide device may deform due to long-term stress, and friction noise may also be generated due to increased gaps.

4. Uneven tire wear
Suspension spring fatigue can cause wheel alignment parameters to be inaccurate, resulting in uneven force on the tire-ground contact surface, which is manifested as serrated or blocky wear on one side or part of the tire. This wear is usually accompanied by increased tire noise.

5. Significant decrease in handling stability
The support and rebound force of fatigue springs are weakened, and the vehicle is prone to "floating" during emergency lane changes or high-speed cornering, with increased steering wheel feedback, and even steering delay or oversteering. In severe cases, the braking distance may be extended or the brake nod may occur.