What Causes Increasing Car Noise?

[Susie]

The reasons for increasing car noise include untimely carbon deposit cleaning, excessively high oil viscosity, tire aging, etc. Specific reasons are as follows: Untimely Carbon Deposit Cleaning: A small amount of carbon deposit does not have a noticeable impact on the vehicle, but over time, the amount of carbon deposit gradually increases, affecting the exhaust valve, cylinder edges, piston top, and spark plug, and may even influence the engine's power; thus, the noise during car operation increases. Excessively High Oil Viscosity: If the oil used is too viscous, the amount of oil flowing into the hydraulic tappets will be insufficient, leading to abnormal sounds and increased noise; therefore, when changing the oil, choosing a relatively lower viscosity oil can help. Tire Aging: With prolonged use, car tires also age, increasing the contact area with the ground during driving, naturally leading to increased noise. Additionally, many standard tires reduce their noise-canceling effects to balance fuel consumption, enhancing the car's grip and other performance aspects. Therefore, once standard tires age, the noise produced during car operation becomes even louder.

[DeRafael]

I've driven many cars, and when the noise gets louder, the first thing to suspect is an engine issue. It could be that the engine oil has thickened over time or wasn't changed promptly, leading to poor lubrication and increased friction, which makes the noise louder. A loose or aged belt can also squeak, especially noticeable during startup. Cracks in the exhaust pipe or loose connections can make the exhaust sound rougher and louder, like a drum. For tires, worn treads or insufficient air pressure can increase driving noise, especially noticeable as road noise at high speeds. Worn wheel hub bearings can produce a humming sound, and if left unrepaired for a long time, it can damage the wheels. Aging suspension components, like shock absorbers, can make noticeable noises when going over bumps. I suggest not delaying and finding time to get it checked at a reputable shop to avoid accidents or spending more on major repairs later. I once ignored minor noises, which led to costly engine overhauls, so now regular maintenance is key.

[VanessaAnn]

Increased car noise affects safety, with tire wear being the primary cause. Incorrect tire pressure or aging tires can turn road noise into sharp screeches, making highway driving unpleasant. Insufficient or dirty engine oil leads to poor lubrication and louder noise. A clogged air filter increases intake noise. Exhaust leaks make the sound louder and may release harmful gases. Damaged wheel hub bearings produce a humming sound and, in severe cases, unstable rotation. Loose body screws, such as those in door brackets, can also be annoying. Addressing these issues promptly is crucial to avoid potential hazards. I often rely on listening to detect problems, like monitoring engine changes at idle. Regular maintenance to address minor issues can save a lot of trouble. Periodic checks on tires and the exhaust system can prevent major failures.

[LaMiguel]

There are several possible reasons for increased noise. A cracked exhaust pipe leaking air can make the sound rougher. Low tire pressure and excessive wear increase road noise. Improper tension of the engine belt causes squeaking. A faulty wheel hub bearing produces a humming sound. A dirty air filter makes the intake noise louder. Aging suspension shock absorbers create noise when going over bumps. Each of these indicates the vehicle is aging and requires maintenance. Don't let the noise accumulate until problems arise; it's advisable to seek repairs early.