What Causes Loud Interior Noise When the Car is Running?
2 Answers
There are several reasons for loud interior noise when a car is running, including engine noise, tire noise, wind noise, and chassis noise. Below are explanations for the causes of loud noise while driving: Engine Noise: Check if the engine oil pump, cooling system, or exhaust pipe is cracked, then adjust the valves and inspect the engine oil pressure. If everything appears normal but the noise persists, consider adding a soundproofing pad under the hood. Tire Noise: Adjust the tire pressure to a moderate level, as excessively high tire pressure can increase noise. Additionally, attaching a piece of felt to the mudguards can help reduce tire noise. Wind Noise: The faster the driving speed, the louder the wind noise becomes. Adding sealing strips to the door frames or incorporating soundproofing material inside the doors can effectively reduce the noise entering the car. Chassis Noise: The chassis may create friction with the air. Applying soundproofing pads and vibration damping sheets to the bottom of the trunk can help mitigate this noise.
I've been driving for over a decade, and the increased noise is quite bothersome. It's mainly due to tire wear or insufficient tire pressure, causing loud friction between the tires and the road surface, almost like scraping against the floor. The engine has also aged, especially when accelerating—it roars unpleasantly. The suspension system often has issues too, like worn-out shock absorbers, making a loud clunk over small bumps. Additionally, the door seals have deteriorated, letting wind noise seep into the cabin, especially noticeable at high speeds. I recommend regularly checking tire pressure, switching to quieter tires, and scheduling a full vehicle maintenance—don't wait until it affects your driving mood and safety.
