Why is the car noisy when running?
2 Answers
There are four main reasons for excessive noise when a car is running. Below is an introduction to the causes of loud noise during car operation: 1. Engine noise: Check whether the engine oil pump, cooling system, and exhaust pipe are cracked, then adjust the valves and inspect the engine oil pressure. If no issues are found but the noise persists, install a soundproofing pad under the hood. 2. 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. 3. Wind noise: The faster the driving speed, the greater the wind noise. Adding sealing strips to the door frames and incorporating some soundproofing material inside the doors can effectively reduce the noise entering the car. 4. Chassis: The chassis can create friction with the air. Applying soundproofing pads and vibration damping plates to the bottom of the trunk can mitigate this noise.
Excessive noise while driving is often related to tire issues. I just helped a friend deal with a similar situation and found that uneven tire wear or surface cracks can be particularly noisy, especially at high speeds. Additionally, incorrect tire pressure can also increase rolling noise. If the car is old, the exhaust system might be faulty—a damaged or leaking muffler produces a noticeable buzzing sound. The engine area should also be checked; aging belts can squeak, and dirty fan blades can be noisy. Wind noise is another concern—large gaps in windows or damaged door seals allow wind to whistle in constantly. In such cases, it's best to visit a professional shop to check tire pressure and wear first. If necessary, replace the tires or repair the exhaust system promptly. Delaying can lead to increased fuel consumption and higher risks. Ignoring these noises makes long drives even more frustrating.
