What are the causes of abnormal noises from the chassis on bumpy roads?
3 Answers
The causes of abnormal noises from the chassis on bumpy roads are: 1. Exhaust or engine failure; 2. Aging of the shock absorber top buffer block and lower control arm bushings; 3. Damage to the stabilizer bar links; 4. Loose chassis suspension system. The function of the car chassis is to support and install the car engine and its various components and assemblies, form the body shape, receive the power from the engine, enable the car to move, and maintain normal driving. The car chassis consists of the transmission system, steering system, running system, and braking system. Methods for maintaining the car chassis: 1. Regularly check the oil condition of important assemblies; 2. Pay attention to the wear of brake pads and clutch plates; 3. Perform four-wheel alignment regularly; 4. Monitor tire pressure and wear condition.
When driving on bumpy roads, the chassis often creaks and squeaks, which is usually a sign of suspension system issues. If the shock absorbers and springs are worn out, they can't absorb the vibrations properly, causing components to rub against each other and make noise. Additionally, worn rubber bushings can loosen chassis parts, resulting in clunking sounds over bumps. I encountered this problem last year—I checked the chassis bolts myself and found a few loose ones; tightening them helped a lot. However, if the issue is severe, it's best to visit a repair shop to replace the parts. Ignoring it long-term isn't just annoying but could also affect steering safety. I recommend having a technician inspect the suspension system during every maintenance session to avoid unexpected problems. Spending a few hundred now can save major headaches later, especially for older cars that have been running for five or six years or more.
I just bought a used car, and shortly after hitting the road, I heard a rattling noise from the chassis whenever I went over bumps—it's really annoying. After asking friends, I learned it might be due to loose tie rods or ball joints, which connect the wheels and can produce noise when worn out. Alternatively, it could be that the underbody protection has fallen off or the exhaust pipe brackets have rusted and broken. I tried looking under the car myself and noticed some rust or large gaps, which gave me a rough idea. If you're a beginner without tools, it's best to consult a professional. Driving without fixing it is unsafe—if the brakes or tires fail, it could be dangerous, especially on slippery roads during rain. Regularly checking tires and chassis fasteners can prevent many minor issues, and addressing them early saves money and ensures peace of mind.
