What Causes Abnormal Noises When Driving on Bumpy Roads?
2 Answers
Causes of abnormal noises when driving on bumpy roads include: Shock absorber failure. When the shock absorber malfunctions, its damping performance decreases, causing collisions between the vehicle frame, leaf springs, and axles, which results in abnormal noises. A faulty shock absorber needs to be replaced directly. Common causes of shock absorber failure include the following three: 1. The rubber components of the shock absorber top mount and arm bushings age and harden, producing noise when squeezed. 2. Damper failure, causing the shock absorber to make abnormal noises. 3. The shock absorber leaks air or oil. The following methods can be used to check if the shock absorber is damaged: 1. Press down hard on the bumper and release; if the car bounces two to three times, the shock absorber is not damaged. 2. Drive on relatively flat roads at low speed; if the car experiences strong up-and-down vibrations, the shock absorber is faulty. 3. Drive ten kilometers on a flat road; the temperature of the shock absorber shell can indicate whether it is faulty.
I've been driving for over ten years, and when I hear strange noises on bumpy roads, it's usually a problem with the suspension system. For example, worn-out or leaking shock absorbers may produce squeaking sounds when going over bumps, or loose suspension spring mounting bolts can cause rattling noises. Components like the exhaust pipe bracket, if rusted or loose, might also make clunking sounds on uneven roads. Another common issue is worn door seals that create squeaky noises due to friction. I recommend first checking the tightness of the chassis bolts yourself to avoid minor issues turning into major repairs, and to regularly maintain the suspension components. If the noises persist frequently, it's best to consult a mechanic immediately—safety first, don't delay addressing the issue.
