Why is the car so noisy?

[MacIsabela]

There are several reasons why a car may be noisy: 1. Severe tire wear: When the tires have bulges, leaks, or severe wear, friction during normal driving can cause noise. 2. Aging car parts: As a car ages, components such as the engine, brakes, exhaust pipe, and seats may become loose due to wear and tear, leading to noise. 3. Low-quality engine oil: Using low-quality engine oil can result in impurities clogging the oil passages, and the engine may not be properly lubricated, causing noise. 4. Damaged sound insulation: If the car's soundproofing material is damaged, it can lead to increased noise.

[VonCaroline]

My old car used to be extremely noisy, so I did a lot of research on this issue. The most common cause is tire problems—bald treads or stones stuck in them can create a rumbling noise. If you switch to wider tires or snow tires, the noise becomes even more noticeable. Next, strange noises from the engine bay might be due to excessive carbon buildup or the need for an oil change. Don’t overlook the chassis either—worn-out bushings on the lower control arms can squeak when going over bumps. Oh, and modified exhaust systems are prone to resonance sounds. A friend’s car had cracked welds on the exhaust tailpipe, making it sound like a tractor when driving. Wind noise is another thing to watch out for—aged door seals can let in a whistling sound. I recently replaced the seals, and it’s much quieter now.

[SanLuna]

Hearing a humming noise while driving on the highway? It's probably the tires causing trouble. If the tire pressure is too high, the ride becomes stiff, and vibrations penetrate directly into the cabin—adjusting it to around 2.3 will make it comfortable immediately. Also, check the tread depth of the tires; if they're worn down to the warning line, replace them promptly. Brake pads can also be a nuisance; when they're thin, they squeak during braking. Once, driving the company's old GL8, the front of the car drummed at speeds above 70 mph—turned out the CV joint bearing had fallen apart. It's normal for the noise to increase when running the AC in summer, as the fan and compressor need to operate. If the noise suddenly increases accompanied by a burning smell, it's likely the belt slipping—I encountered this situation last winter.

[DiAlana]

After spending a long time in the repair shop, I've summarized some patterns. For low to medium speed noises, check the chassis first: loose stabilizer bar ball joints will clunk over speed bumps, and cracked lower arm bushings will squeak during turns. High-speed noises mainly involve the drivetrain—worn differential gears will whine, and cracked transmission mounts can cause cabin-wide resonance. Gasoline cars making rattling noises during hard acceleration might be experiencing knock—try using 95-octane fuel. For diesel engines with clicking sounds, inspect the fuel injectors; excessive valve clearance also causes rhythmic knocking. Turbocharged vehicles should have their blow-off valves checked—air leaks sound like whistles. Remember: rhythmic noises usually come from rotating components, while random noises often point to bushings or rubber mounts.