What Are the Causes of Abnormal Noises When a Car Goes Over Speed Bumps?
2 Answers
Abnormal noises when a car goes over speed bumps can be caused by: 1. Loose or aged chassis components; 2. Shock absorber failure; 3. Damaged stabilizer bar rubber cushion blocks. Solutions for abnormal noises when a car goes over speed bumps include: 1. Tightening or replacing chassis components; 2. Replacing shock absorbers; 3. Replacing stabilizer bar rubber cushion blocks. The working principle of shock absorbers is that when relative motion occurs between the body and axle due to vibration, the piston inside the shock absorber moves up and down, causing the oil in the shock absorber chamber to flow through pores into another chamber. The friction between the pore walls and the oil, as well as the internal friction between oil molecules, creates a damping force that converts the car's vibration energy into heat energy of the oil, which is then absorbed and dissipated into the atmosphere by the shock absorber. The function of shock absorbers is to suppress oscillations from the spring's rebound after absorbing shocks and impacts from the road surface, reduce vibrations in the frame and body during acceleration, and improve the driving stability of the car.
When I first started driving, I also encountered the issue of noises when going over speed bumps. Later, during a repair, I found out it was a problem with the suspension system, like worn-out shock absorbers or springs. Especially for cars that have been driven for several years, the rubber bushings are prone to wear and crack, causing squeaky noises over bumps. Also, the connection points of the chassis stabilizer bar can make clunking sounds if they become loose. Don’t underestimate these noises—get them checked at a repair shop promptly, or prolonged neglect could affect handling safety. Additionally, slow down when driving over speed bumps to reduce vibration and wear on components. During regular maintenance, have a technician inspect the chassis and apply some grease to prevent such issues and avoid embarrassing moments on the road.
