What Causes a Thud Sound from the Chassis When Starting the Car?
2 Answers
Here are the reasons for a thud sound from the chassis when starting the car: 1. Aging of chassis components: After a period of use, the suspension system of the car may age, causing some supporting parts to gradually lose their original function, resulting in abnormal noises from the chassis when starting. 2. Rust in the braking system: In areas with more rainfall, the brake discs are more prone to oxidation and rust. 3. Foreign objects in the wheels: When driving on surfaces with a lot of debris, some foreign objects may enter the car tires. These objects, if left for a period of time, can cause abnormal noises when the car starts. Here is some additional information: 1. The chassis consists of four parts: the transmission system, the running gear, the steering system, and the braking system. 2. Its function is to support and install the car engine and its various components and assemblies, forming the overall shape of the car, bearing the engine power, and ensuring normal driving.
When starting the car, there is a sudden clunking sound from the chassis, which is usually caused by problems with certain components of the suspension system. For example, worn-out stabilizer bar bushings or ball joints in the front suspension can lead to increased gaps between parts, causing an impact sound when you press the accelerator due to the vehicle's weight transfer. It could also be due to aging suspension springs or loose brackets, causing the chassis to shake during startup. If not repaired promptly, long-term neglect can easily damage the shock absorbers or affect handling stability, making steering less precise. Pay attention to changes in sounds while driving and visit a professional repair shop for a comprehensive inspection as soon as possible. For instance, using a lift to inspect the chassis connection points and replacing worn bushings can resolve most issues. For safety reasons, don't ignore minor abnormal noises to avoid accidents at high speeds.
