I think most car owners have encountered the problem of abnormal wheel noise. Sometimes they don't care much if they think it's a small problem, but the abnormal noise often reflects some faults or problems of the car. If they can't find and eliminate the faults in time, it will bring great hidden dangers. Speaking of driving danger, in addition to brake failure, accelerator failure. The fault on the wheel is very dangerous. How to judge the possible faults and hidden dangers on the wheel from the abnormal noise on the wheel?
1. The tyre was punctured with nails and gravel
The sound is the sound of the tire turning around. It's like something knocking on the ground. With the increase of the speed, the rhythm is fast. If it's a stone, just pry it off. If it's a nail, if the tire pressure is OK in the city, you can drive the car directly to the repair shop to repair the tire.
2. Metal friction sound - brake pads too thin
The front brake pads of cars generally have electronic devices, while the rear wheels do not, but most of them use mechanical alarm pads. When the brake disc is worn too thin, it will make a metal friction sound of "pricking" and "pricking". It's very slight when you don't step on the brake, and the sound will increase when you step on the brake, which is very harsh. At this time, you need to change the brake pads slowly.
Generally, the thickness of the brake pad can be observed from the gap of the wheel rim. When the observed estimated thickness is less than 3mm, it needs to be replaced. To replace the brake pads, go to a regular repair shop. This is a key part. We must not be careless.
3. Uneven tread
This kind of abnormal noise gives the impression that the tire seems to be rolling on something all the time, and it is often accompanied by the phenomenon of steering wheel shaking and turning left and right. In these cases, replace the tire (or rim) and never drive with disease.
4. Abnormal noise of wheel bearing
The sound is a kind of "buzzing" sound, which gradually increases with the increase of vehicle speed. If you suspect that the bearing is noisy, you can jack up the wheel and check it according to the picture below. If the tire bearing rings, it is recommended to go to the maintenance factory for inspection and replacement as soon as possible to avoid damaging the axle body.
5. The tire pressure is too high and gets bigger too early
Generally, the tire pressure of passenger cars should be about 2.4 bar before and after no-load, about 2.6 bar before and about 2.7 bar after full load. Each car is also different. Please refer to the user manual of your car for specific and accurate values. The tire pressure is too high. When running, you can not only hear a loud tire noise, but also feel as if the suspension has hardened, bumped heavily, and the direction has become light and floating. In this case, release the air and adjust the air pressure to the standard value. For vehicles with tire pressure monitoring, such a situation rarely occurs, because it can be seen at that time after charging.
6. The bolts are not tightened
The sound is the sound of "bang" and "bang" at the moment when the vehicle moves and stops, and there is also an obvious sound during acceleration, deceleration and steering. It's very loose. I can still feel the body twisting and swinging when driving, which is difficult to control. The solution is to retighten the bolts, but it is recommended to go to the maintenance factory as soon as possible to check whether the bolt holes on the bolts or rims are damaged. If damaged, they should be replaced as soon as possible.
The above is the knowledge brought to you today. Jinan Audi has specialized in the industry for many years and continuously provides users with valuable content. Please continue to pay attention to us for more content: http://www.sdrunao.com