What Causes Loud Noise Inside the Car?
2 Answers
The causes of loud noise inside the car are: 1. Engine carbon buildup; 2. Shock absorber failure; 3. Large gaps in the cabin or vehicle body; 4. Tire aging; 5. Damaged valve guides; 6. Cooling system malfunction; 7. Poor quality engine oil; 8. Engine misfire; 9. Spark plug carbon buildup. Methods to reduce car noise include: 1. Applying sound-absorbing foam material under the engine hood; 2. Installing sound-absorbing cotton material in the trunk, at the bottom of the luggage compartment, and on the wheel arches on both sides of the luggage compartment; 3. Installing sealing strips inside the doors; 4. Mounting professional damping plates in areas prone to noise; 5. Replacing tires.
Why is there always a loud buzzing noise in the car? My old car used to be like this too, and later I found out that the tread patterns on all four tires were almost worn out, making it sound like driving a tractor. When tires wear down to the warning line, the noise becomes significantly louder, especially noticeable at highway speeds. Another issue was a faulty front wheel bearing—once the car hit 60 km/h, it would start whining, but replacing the bearing immediately made it quiet. Loose underbody panels can also cause metallic resonance noises, particularly noticeable on rainy days. Actually, all these issues are related to routine maintenance—don’t delay replacing worn-out parts.
