What Causes a Sudden Increase in Car Noise?
1 Answers
A sudden increase in interior noise is usually caused by damage or rapid aging of certain components, such as the engine system, car tires, or shock absorber system. The engine system has many parts, which can lead to various issues. For example, aging engine rubber mounts or excessive carbon buildup inside the engine may result in increased interior noise. First, it's important to understand carbon buildup. Excessive carbon deposits can cause poor cylinder performance, leading to greater vibrations and noise. Therefore, regular carbon cleaning and engine maintenance are crucial. Secondly, the engine itself continuously vibrates during operation. The reason we don't usually notice the noise is that modern cars have better sound insulation and vibration damping, and the engine rubber mounts help reduce noise and vibrations. In fact, the engine is not directly connected to the frame—there is a rubber bushing between them. If the rubber deteriorates due to aging, it loses its original damping effect, allowing engine vibrations to directly transfer to the frame and into the cabin, even causing resonance. At this point, you may perceive loud noise. To solve this issue, promptly replace any aged or damaged engine rubber mounts. Tires: Tire noise is also worth mentioning regarding interior noise. As tires continuously rub against the road and air while driving, they generate noise. Common factors affecting tire noise include tire material, tread pattern, tire pressure, and dynamic balance. If your car's tire noise is unusually loud, check whether it's due to prolonged tire wear or insufficient tire pressure. Shock Absorber System: The shock absorber system is one of the car's comfort systems, primarily responsible for reducing the sensation of body vibrations. Although a car can still drive without shock absorbers, even minor road irregularities would cause significant vibrations. Therefore, proper shock absorber maintenance is essential.
