【Car owner’s home car knowledge】 Abnormal noise is not a disease, it is really terrible when it sounds! When it comes to abnormal noise in cars, I believe that everyone who often drives will feel the same. It has been troubled for a long time, but they cannot find out the cause of the abnormal noise. They either choose to accept it or keep investigating. In the end, there are still many people who are still unsuccessful. When driving on the road every day, even small noises are enough to make people restless and worried. Is the vehicle really at risk of major problems? Vehicles will make a certain amount of noise during normal driving, but if this noise exceeds a certain range, it can be regarded as abnormal noise from the car body.
1. There is abnormal noise in the car body
Description of symptoms:There are always some abnormal noises from certain parts of the car body when driving or braking. The sound is not loud and does not affect normal driving, but it always makes people worry that something is wrong.
Analysis question:This problem usually occurs because the vehicle body is not rigid enough, causing the vehicle to deform while driving, causing friction or vibration between the door and the frame, or friction between steel plates caused by desoldering in some places.
There are also some cars that have
【Car owner’s home car knowledge】 Abnormal noise is not a disease, it is really terrible when it sounds! When it comes to abnormal noise in cars, I believe that everyone who often drives will feel the same. It has been troubled for a long time, but they cannot find out the cause of the abnormal noise. They either choose to accept it or keep investigating. In the end, there are still many people who are still unsuccessful. When driving on the road every day, even small noises are enough to make people restless and worried. Is the vehicle really at risk of major problems? Vehicles will make a certain amount of noise during normal driving, but if this noise exceeds a certain range, it can be regarded as abnormal noise from the car body.
1. There is abnormal noise in the car body
Description of symptoms:There are always some abnormal noises from certain parts of the car body when driving or braking. The sound is not loud and does not affect normal driving, but it always makes people worry that something is wrong.
Analysis question:This problem usually occurs because the vehicle body is not rigid enough, causing the vehicle to deform while driving, causing friction or vibration between the door and the frame, or friction between steel plates caused by desoldering in some places.
There are also some cars that have loud wind noise, which is related to the shape of the car to a certain extent. In some cars, the body parts of some cars are not fixed well, which may also cause abnormal noise. Generally, tightening the screws can solve the problem.
Solution:
First, check whether there are any objects placed in the trunk or rear seats of the car that are not fixed, roll easily and make noise, and rule out the noise caused by some items not being fixed properly.
If you find that the friction between the door and window parts causes abnormal noise, you can stick tape on the doors and windows or put rubber on the friction parts. This may reduce or eliminate the abnormal noise, but the result is only a temporary solution and not the root cause. If none of the above problems are found, you must go to a regular repair shop for inspection and troubleshooting.
2. The engine makes abnormal noises
Description of symptoms:It is more likely that there are abnormal noises in the engine compartment. Most people judge the abnormal noises in the engine compartment based on the source of the sound, which is usually a metallic screeching sound or a wind whistling sound.
Analysis question:Abnormal noise coming from the engine compartment will include a harsh belt whistling sound, which is usually caused by belt slipping; there will also be a sharp sound of dry friction of metal parts when the engine is running, which is usually caused by damage to the bearings of the generator, water pump, and power steering pump; if it is the sound of air leakage when the engine is running, it may be the result of a blockage in the exhaust system, leakage or breakage of the vacuum tube.
Solution:Abnormal engine noise indicates that the technical status of a certain mechanism of the engine has changed. It is mainly caused by excessive wear of some parts or improper assembly and adjustment. Some abnormal noises can predict the possibility of accidental damage to the engine. Therefore, when abnormal noises occur in the engine, they should be repaired in time to prevent the failure from expanding.
It should be reminded that if there are abnormal noises in the engine, most car owners will not be able to solve them by themselves, and it is best to send them to the factory for maintenance.
3. There is abnormal noise in the gearbox
Description of symptoms:If there is a "rustling" sound inside the gearbox while the car is driving, but it disappears after depressing the clutch or accelerator, there will be a whistling sound when shifting gears.
Analysis question:If the source of noise encountered while driving is from the gearbox, it may be caused by worn gearbox bearings or gears or bearing spots. If the gearbox makes abnormal noise when speeding up and shifting, it may be that the gearbox oil contains metal powder, indicating excessive wear of components such as the brake belt clutch in the gearbox.
Solution:There are many parts in the transmission, and the causes of the noise are also complex. When analyzing and judging, you should pay attention to whether it is related to a specific speed. For example, the noise of some planetary gears is obvious at around 50Km/h. Whether it is related to certain gears is very important to determine the transmission failure. If a certain gear makes noise, it must be related to the components that affect the transmission of that gear; if all gears make noise, it is often a fault of the constant meshing gear shaft or the transmission is short of oil. Whether it is related to specific actions, such as upshifting, downshifting, starting, rapid acceleration, rapid deceleration, turning, etc. are all effective means to determine the abnormal sound. Among them, changing speed and direction are particularly important for determining rear axle failure.
If there is obvious abnormal noise in the transmission, it is recommended to send it to a professional repair shop to check out the faulty parts and then replace them.
4. The tires make abnormal noises
Description of symptoms:The tires make a rhythmic sound, and the frequency becomes higher the faster the vehicle speeds.
Analysis question:When a car tire contacts the ground, it will produce various noises of varying intensity depending on the type or unevenness of the road, the speed of the car, the type of tire, and the air pressure of the tire itself. Therefore, no matter how perfect a car is, it cannot completely eliminate the noise generated by the tires and the ground during driving.
Solution:First check whether the tire screws are tight and eliminate abnormal noise symptoms. When the wheel hub screws are loose, lightly apply the brakes when going downhill, and the wheels will make a subtle knocking sound. If the rear wheel screws are loose, the sound of the wheels will be amplified through the trunk, and may be mistaken for things placed in the trunk. When the wheel hub screws are severely loose, the wheels will sway while running, and a more obvious clicking sound will be heard at low speeds. At this time, the vehicle should stop immediately to check the wheel hub screws.
If the tire sound is rhythmic and the frequency is high at fast vehicle speeds, you can judge the cause based on the sound: if it is a low "pop" sound, it is probably due to tire tread deformation, bagging, serious wear or insufficient air pressure; if it is a "click" sound, it may be that the tread is mixed with small stones; if the tire If there is a whirring sound, and the car body is obviously shaking or even drifting in the direction, it goes without saying that the tire must have burst. Get out of the car and change the tire; if there is a sound of metal collision inside the tire while driving, it may be caused by damage to the shock absorber and bearing. Car owners should go to a professional auto repair shop or 4S shop for repair.
Car tips:
Develop a good habit of checking the tire and hub screws before getting in the car to prevent accidents in which screws are lost from the flywheel. At the same time, the car body condition and tire deformation should also be checked.
Develop the habit of observing and listening to the sound of the vehicle running. Once you find any abnormal noise while the vehicle is running, be sure to check it carefully.
Develop the habit of regularly checking 4 oils and 2 water, spare tire pressure, and wheel hub screws. Any problems found must be dealt with in a timely manner without delay. If the spare tire pressure is insufficient, you will find that the spare tire is unavailable when you need to change the tire.
Special attention should be paid to special circumstances. If you go to a repair shop to perform operations such as exchanging front and rear wheels, be sure to carefully check whether the tire screws are tight, and tighten the screws frequently to prevent the screws from running away.
After a bad run on the road, you should check the tires, shock absorbers and other components, paying special attention to whether the tires are damaged to prevent serious accidents such as flat tires at high speeds with damaged tires.
