Why is the car noisy when running?

[MacChase]

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.

[DeCassandra]

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.

[EloiseFitz]

I suddenly feel that the noise from my car has become noticeably louder, which is particularly annoying, as if my car has developed a fault. Once when I was driving on the highway, I noticed a screeching noise, and upon inspection, found that the brake pads had worn too thin, causing metal-to-metal contact and a high-pitched scream. I've also heard cases where the wheel bearings failed, producing a roaring sound during rotation. Issues with the drivetrain, such as loose universal joints, can also cause clunking noises. If it's a new car, it might not be a big deal, but older cars are more prone to such problems—I recommend that car owners perform a self-check first. Park the car in a quiet place and listen for any unusual sounds from the engine area while idling, then inspect the tire tread for even wear. Regular maintenance is key—for example, rotating the tires every 20,000 kilometers to reduce noise caused by uneven wear, ensuring safety and peace of mind.

[JulietDella]

A significant increase in noise must be addressed as a safety concern. I have reminded many car owners that loud noises while driving may indicate a risk of tire blowout. For example, excessive tire pressure or aged rubber can cause continuous abnormal sounds during sharp turns. Loose chassis components, such as faulty suspension systems, can produce more noticeable thumping noises, affecting handling stability. Low engine oil levels can also intensify friction sounds. Upon noticing unusual noises, immediately reduce speed and pull over to conduct a preliminary inspection—check tires for bulges or cracks and look under the hood for any fluid leaks. Neglecting timely repairs not only leads to high decibel levels that can damage hearing but also increases the risk of accidents. Developing a habit of monthly inspections can prevent potential hazards.