The air conditioner is on in hot weather, and the noise of the car is very loud. What happened? Turn on the air conditioner when the weather is cold and it doesn't ring.

Abnormal car body noise is the most common, generally because the car body stiffness is not enough. Long-term intense driving or a large number of bumpy roads will lead to slight deformation of the car body steel frame. The most direct influence is the abnormal impact or friction between the door and the car condition, or the abnormal friction of some welding or screw parts, which may also cause abnormal noise; But some cars have high wind noise, which is related to the shape of the car to some extent.

Solution:

These abnormal noises are not terrible and will not have a great impact on the overall performance of the vehicle, but they are troublesome to handle and difficult to cure. Only rubber pads or sponges can be added to abnormal friction or impact parts.

2. Abnormal sound inside the car

Abnormal noise in the car is the most common, and there are many parts where abnormal noise occurs, such as loose installation of decorative plates, loose glove box of co-pilot, collision of seat belt buckles, etc.

Solution:

Automatically start repositioning or filling soft objects.

3. Abnormal braking sound

If there is a "squeak" when stepping on the brakes, it is mostly caused by excessive wear of the brake pads and excessive clearance. Of course, improper use or deformation of brake disc materials, and unqualified hardness, porosity, friction characteristics and compression characteristics of brake pads may all lead to abnormal sound.

Generally speaking, the service life of the front brake friction plate is 30,000 km, and that of the rear brake friction plate is1.20,000 km.

Solution:

Abnormal braking noise can generally be solved by replacing brake pads. If the brake disc is damaged, it needs to be replaced. Pay attention to the model and other issues when replacing, otherwise there will still be abnormal noise if it does not match.

4. Hanging abnormal sound

The suspension system keeps running during driving, and the rubber bushing between the shock absorber and each connecting rod is bound to wear. When the casing is aging or falling off, there will be abnormal metal impact sound. If the shock absorber is broken, there will be a "knock" or "click" sound on the bumpy road.

Solution:

Hanging abnormal sound cannot be solved by itself, so you need to go to a repair shop or 4S shop to have a special master replace the parts. It must be solved as soon as possible, and it is best to strengthen inspection in daily maintenance to prevent abnormal sound.

5. Abnormal tire noise

The abnormal noise caused by tires is generally tire noise, and the noise generated will also produce various noises with different intensities according to factors such as vehicle speed, tire model, tire pressure and road conditions. When there is a low "snapping" sound, it is mostly tire tread deformation, bulging, serious wear or insufficient air pressure. For example, the tread may be mixed with pebbles or nails.

If the wheel part makes noise of metal collision and friction during driving, it is likely that the shock absorber and bearing are damaged. When you encounter these problems, you should pay attention to the owners, even if it is just nailing, it is also dangerous.

Solution:

If you find that the tread is mixed with pebbles, you can clean it yourself. Other problems need to attract the attention of car owners and find professionals to deal with them.

6. Abnormal sound of steering wheel

Abnormal noise will occur when the steering wheel turns left and right. When there is abnormal noise in the middle of the direction, it can basically be judged as abnormal noise of the steering gear. If the steering wheel makes an abnormal noise after death, it is difficult to tell the source of the abnormal noise. The most common answer from testing in the 4S store is the friction of the rubber sleeve of the steering rod ball joint.

In addition, oil leakage from the dust cover of the steering gear, insufficient tightness or aging of the booster belt will also cause abnormal sound.

Solution:

The ball head of tie rod is aging and the steering gear is out of order, so it needs to be replaced in time.

7. Abnormal noise in the engine compartment

The abnormal noise in the engine compartment is very complicated and needs careful investigation.

If the belt is punctured, squeaking or squeaking, it is usually caused by the belt slipping. If it is the sound of air leakage, it may be that the exhaust system and vacuum tube are blocked and broken. If the external metal parts have abnormal friction when the engine is running, it may generally be caused by the damage of the generator and water pump.

Solution:

Find a professional to repair as soon as possible.

8. Abnormal sound of gearbox

If there is a "rustling" sound inside the gearbox when the car is driving, there will be a howling when shifting gears, which may be caused by the wear of gearbox bearings or gears and bearing spots.

The abnormal sound of the gearbox may be caused by the metal powder contained in the gearbox oil, indicating that the brake pads and clutches of the gearbox are excessively worn.

Solution:

The gearbox is a precision equipment, and it needs to be repaired in time no matter what abnormal sound occurs.

Hope to adopt!