Many car owners must face such problems. This is my favorite car. When I first bought it home, it was in good condition. It is very quiet and very comfortable for everyday driving. My family loves it too. However, over time, you will find that noise of car gets louder and louder. The most important thing is that you do not know where noise comes from, what problems it presents, whether it will affect driving, negatively affect safety Does not affect. So, why does the car make more and more noise when driving for a long time?
01 engine noise
As a general rule, after driving a car for a long time, most noticeable change in noise should be engine noise. Especially for those vehicles that have not serviced engine for a long time, noise performance is especially evident. And there are three main reasons for this.
Oil viscosity too high
When changing engine oil, many people try different replacement engine oils to check type of engine oil that is best for them. But for engine, if too thick oil is used, amount of oil entering hydraulic compensator will be insufficient each time, resulting in valve knocking and noise. At this time, it is only necessary to change gasoline with a relatively low viscosity.
Using old engine oil will cause engine oil to run thinner and increase amount of carbon deposits. If engine oil is thin, engine oil will leak out easily, causing more and more soot, causing more power to be lost. When changing new engine oil, engine may temporarily not adapt to viscosity of new oil, which can increase speed and cause loud engine noise. You can clean carbon deposits in engine accordingly!
Aging of machine supports
The machine's rubber mount supports engine and absorbs vibration transmitted from engine to vehicle. When rubber feet of machine age or become damaged, vibration and noise in machine will increase, which will affect ride comfort. When machine's rubber mount is severely damaged, it may even cause motor to fall off frame. Therefore, if you find that engine noise is too loud, you need to check condition of machine's feet. If machine's rubber foot gets old, just replace it!
The tire pattern ages and wears heavily, tire noise suppression effect is reduced, and driving noise naturally becomes louder. Of course, conventional tires use a compromise strategy to balance fuel consumption and quietness, while sports tires forgo some of quietness and opt for traction and other features. If you have a relatively high requirement for quietness of car, it is recommended to replace it with silent tires, effect will be much better.
Generally, we can feel whether shock absorber of car is good when passing speed bump, and shock absorber of car should dampen vibration of car and play role of damping and cushioning. If engine breaks down or oil leaks, depreciation of car will not be obvious, and at same time, it will also increase noise in room. If a car's shock absorber fails or leaks oil, shock absorber replacement will cost a lot of money!
In general, when you find that your car is getting louder and louder, do not be careless and inspect car immediately, because noise of car reflects many problems, especially when it comes to three main parts If there is a problem with three main parts, it will have a great impact on daily driving, and even seriously affect safety of car. Therefore, when faced with unknown noises, you must conduct a thorough investigation to ensure a safe journey