Why Does the Car Keep Making Noise When Driving Over Bumpy Roads?

[JordanAnn]

Due to displacement or deformation in the suspension components, damaged buffer rubber sleeves or blocks, or deformation, oil leakage, internal component wear, or damaged rubber sleeves in the shock absorber. Here is additional information about car noises: 1. In the suspension system, vibrations are generated when elastic components are impacted. To improve driving comfort, shock absorbers are installed in parallel with the elastic components to dampen vibrations. 2. When the piston inside the shock absorber moves up and down, the oil in the shock absorber chamber repeatedly flows from one chamber to another through different pores. The friction between the pore walls and the oil, as well as the internal friction among oil molecules, creates a damping force, converting the car's vibration energy into heat energy, which is then absorbed and dissipated into the atmosphere by the shock absorber. 3. When factors such as the cross-sectional area of the oil passage remain unchanged, the damping force increases or decreases with the relative speed between the frame and the axle (or wheels), and it is related to the viscosity of the oil.

[Duane]

My car used to do this all the time too, making a loud clunk over every little bump—so annoying. It’s likely an issue with the suspension system, like leaking shock absorbers or loose springs. Over time, parts wear out and become noisier when vibrating. Other common causes include loose chassis bracket bolts or uneven tire tread, which can make driving feel nerve-wracking. I recommend doing some basic troubleshooting first—listen to whether the noise comes from the front or rear, then inspect the chassis and wheel connections. Don’t ignore this; driving long-term in this condition will accelerate wear on chassis components, leading to even costlier repairs. Regular maintenance, like having a shop tighten bolts, can save you a lot of hassle and money.

[DeZoe]

I'm someone who loves pondering over cars, and I think the noises on bumpy roads might be caused by body resonance. Chassis components like brake disc brackets or suspension arms can fatigue. Modern cars are designed with precision, but too many bumps can easily lead to issues. It could also be due to insufficient tire pressure, causing the wheels to wobble and collide. When driving daily, pay attention to where the noise is coming from. If it's accompanied by steering wheel vibrations, be extra cautious—it might involve brake safety. Don't procrastinate; simply check the tire pressure or visit a shop for an instrument inspection to prevent minor issues from becoming serious. Additionally, with temperature changes, rubber components age faster, so regular checks can maintain the integrity of the chassis structure and ensure a smoother drive.

[LaElle]

My car used to do the same thing, making a rattling noise over speed bumps, which was quite scary! It's most likely that the chassis bolts are loose, or the shock absorbers are worn out and no longer providing cushioning. Unbalanced tires can also cause abnormal vibrations, and the increased noise can be distracting and affect your mood. It's best to take it to a repair shop for a thorough check as soon as possible—don't try to save money by ignoring it, as it could lead to accidents on the highway. You can also do some basic checks yourself, like shaking the wheels after parking to test for looseness, and address any issues promptly—safety first.