What is the cause of the abnormal noise of the car?

The main reasons that may cause abnormal noise of automobile tires are as follows:

The first aspect: there are a lot of things stuck to the surface of the car tires, which makes you "pop" when driving;

The second aspect: the car tires are stuffed with a lot of small stones, and there is a clicking sound when driving, if you take the stones out in time.

The third aspect: car tires have a lot of nails and things like that. That is to say, if the tire is punctured, the tire pressure of the four wheels is different, and there will be abnormal noise.

Fourth aspect: if your car is years old. It may be that the brake pads have become very thin, and the brake pads should be replaced in time at this time.

The fifth aspect: the tire pressure of the car is too large, resulting in large friction on the road surface, and the abnormal noise.

Sixth: Automobile tires may be surface aging, resulting in uneven tire surface, resulting in abnormal noise.

The last aspect: it may be that the tire is repaired, or the tire screws of the tire are not tightened when repairing the car, which causes the wheel to deviate and make an abnormal noise!

All in all, if you find that the car tires have abnormal noises, and you can't distinguish them, you should go to the 4S shop or maintenance place in time to deal with it. so as not to cause unnecessary losses, so as not to cause unnecessary losses.

If the car has an abnormal noise when idling, and the abnormal noise disappears after pressing the clutch, it means that the abnormal noise** is caused by the failure of the gearbox. Abnormal noises in the gearbox are generally caused by wear of bearings or gears.

There are many reasons for the abnormal sound of the motor: 1. If it is a frequency conversion motor, the frequency may be too high, and the mechanical resonance point cannot be avoided.

2. If there is no inverter, you should first determine whether it is the abnormal noise of the motor or the mechanical abnormal noise of the motor dragging. The abnormal noise of the motor may be a bad fan b the bearing is seriously worn due to lack of oil c If the rotor shaft of the motor does not rotate and the motor is abnormal noise, then it is certain that the rotor shaft and the rotor winding (cast aluminum ratron rotor) are loose. FYI.

Abnormal noise**1: storage compartment. I believe that most car owners do not have the habit of tidying up the storage compartment, the car has not been sorted out for several years The storage compartment must be full of messy items, so that no matter where the car is driving, as long as the engine opens the storage compartment The items in the compartment will follow the engine "beating", and the abnormal noise you hear is likely to be the vibration of the storage compartment.

In fact, it is very simple, everyone only needs to observe that when the speed increases, the louder the sound, it proves that the car transmission system is faulty. The most effective solution is to see if the car tires have a puncture, if there is, it is recommended that you go to a regular car 4S shop for maintenance.

Abnormal noise**3: abnormal noise outside the car. If the abnormal noise heard is from outside the car, we should first look at whether the doors and windows of the car are normal, and at the same time see if there are things in the trunk.

In addition, you should also check whether there is any debris around the wiper, and clean it up in time if there is one, so as not to affect the normal use of the wiper.

You must know that the service life of car pulleys is about eight years, and if you have not replaced the car pulleys for more than eight years, it will make a "cough" sound in the cold winter. If you want to change the pulley, it is recommended that you go to a regular car 4S shop to replace it, and do not do it yourself, otherwise improper operation will cause damage to the car.

First, the engine abnormal noise and the rear axle abnormal noise discrimination, first of all, the car on the flat road to a certain mileage, so that the rear axle working temperature rises to normal, and then when the car driving abnormal noise, note the speed, after stopping, put the transmission in the neutral position, and then slowly accelerate, until the speed of the engine is equivalent to the speed of the abnormal noise, observe whether there is abnormal noise, can be repeated several times, to determine whether the abnormal noise is caused by exhaust or abnormal conditions of the engine.

Second, the difference between tire noise and rear axle noise, tire noise changes with the road surface, but the rear axle noise is not.

When the speed of the car is below 48kmh, the rear axle noise disappears, while the tire noise continues.

The noise of the tires is the same when the car is driving and coasting, but the noise on the rear axle is different.

It is recommended to go to a 4S shop or repair shop for an inspection and drive with confidence.

If the shock absorber fails, replace the top pressure bearing and it will be fine. At the same time, look at the top of your shock absorber (whether the body connection is flat) A lot of cars squat when they are over-chopping, which is easy to cause plane deformation, large steering resistance, and abnormal spring rattling.

1. Wiper blade aging: two wiper blades are rubber products, which will be aged and hardened after a period of time, and it is more significant in winter. Most wiper blades are recommended to be replaced every one to two years.

2. There is a foreign object in the middle of the wiper blade: when the wiper is opened, there will be a sharp sound of friction between the wiper blade and the front windshield.

3. The installation angle of the two wiper arms is wrong: it will affect the wiper blades to jump on the windshield, then it will cause a sound. If the two wiper blades are normal, you need to adjust the angle of the wiper arm so that the two wiper blades are perpendicular to the windshield plane.

It is normal for brake discs and brake pads to make a slight noise due to friction when braking.

If there is an unusual noise, there may be one of the following reasons:

1. The hardness of the brake disc is different during manufacturing, resulting in different degrees of wear, which will not have much impact.

If the sound you hear is in the cab (at the brake pedal), it may be due to the wearing of the nylon bushing on the brake pedal fixing bracket and the sound of the brake pedal fixing pin rubbing against him.

2. The wear of the disc is very serious, and there is a direct contact with the iron parts.

Ways to solve the problem:

1) If it is the cause of the hard point, the easiest way is to step on the hard point when the speed of the sports car is about 5 kilometers backwards, and you can generally remove the hard point. The sound is not too loud, it is recommended or ignored, and it has no effect on driving.

2) If it is iron touching iron, the disc should be replaced immediately. In addition, at this time, the brake of the instrument does not alarm, and the sensor connected to the brake fault light should be checked at the same time.

1.Engine: Whirring is a problem with the bearing, squeak is a problem with the starter or belt; 2.

Gearbox: The click sound means that there is a problem with the gear, the rustling sound is the problem of the bearing, and the click sound means that the gearbox is seriously damaged; 3.Brakes:

The sound of metal rubbing indicates that the brake pads need to be replaced; 4.Steering system: A rattling sound indicates a problem with the steering ball joint or rubber sleeve.

The abnormal noise of the car is mainly caused by the failure of the engine, because if the engine is faulty, there will be abnormal noise.

It may be because your engine has some foreign objects, because the engine is running all the time while the car is driving, and if there are some foreign objects in your engine, then the car will make strange noises.

It is very likely that the brake pads and brake discs make a sound due to friction, at this time it is necessary to check the thickness of the brake pads, if the thickness of the brake pads is normal, it does not matter much, but if the brake pads are too thin, then it must be replaced in time, if not replaced in time, it is likely to lead to brake failure and accidents. It is also possible that the exhaust pipe is leaking.

It may be that the reactive fire plug of the car is aging, so friction occurs during driving.

Check the tires and wheels, if the tires are severely worn, there will be abnormal noises.

Check the brake pads and clutch pads, and if the aging is severe, be sure to replace them.

The oil in the engine must be changed on time, otherwise the engine will age and have abnormal noise.

If you hear the abnormal sound of "Zizi" in the process of driving, and this is the abnormal sound caused by the problem of the engine belt, because the abnormal sound of "Zizi" is mostly the aging of the belt group of the engine, or the problem of the tensioner wheel causes the belt to be too loose, the friction abnormal sound, belt slippage, etc., if there is a similar "Zizi" abnormal sound, then look for the major belt groups and tensioners inside the engine, such as engine timing belt, generator belt, circulating water pump belt, air conditioning belt, The problem of this abnormal noise is the abnormal sound of the engine belt, which is caused by the smooth grinding surface of the joint surface of the belt and the pulley. It usually occurs when the engine speed changes rapidly, and sometimes the belt rings when the load of the attachment driven by the belt increases. How to solve the problem of abnormal noise of engine belt 1. Check whether the accessories driven by the belt are damaged, stuck, loose or the power of the accessories has increased.

2. Replace the belt, or use 100 gauze to polish the joint surface of the pulley and the belt (light grinding is fine). 3. The temporary solution can be to drop 1 2 drops of oil on the joint surface of the belt and the pulley (will not affect the belt slippage) You have to judge that the belt is a good way is to drip oil on the belt, if the generator belt rings and the headlights are turned on more obviously, you have to take off the generator belt, turn the motor pulley, see if the generator rotates smoothly, if the generator is normal, you can check whether the battery is not stored power, because the battery storage is not good will increase the load of the generator. The above is what is going on with the abnormal noise of the engine belt and how to solve the problem of abnormal noise, I hope it will help you!