If it's within the warranty period, it's free. If it is not within the warranty period, you will have to pay. Abnormal noises in cars that need attention: Abnormal noises in the transmission, in the engine compartment, abnormal noises in the steering wheel, suspension, brakes, etc.
Abnormal noises are also divided into levels. Some abnormal noises are not serious and can be resolved by yourself. However, some abnormal noises are related to driving performance and vehicle life. If you do not pay special attention to it, it may cause malfunction or even danger during use.
Abnormal noise in the gearbox. Abnormal noise in the gearbox is usually caused by worn bearings or gears. There are many parts in the gearbox and the causes of noise are also complicated. PTherefore, no matter what abnormal noise there is, it should be repaired in time (the maintenance cost of the gearbox is high, so it should be checked). frequently and the oil is changed frequently).
Abnormal noises in the engine compartment and engine vibrations are normal phenomena, but there are also special cases, such as screeching belt noise, which is usually caused by slipping of the belt. belt; another example is dry rubbing; of metal parts A high-pitched noise is usually caused by damage to the bearings of the generator, water pump and power steering pump.
Solution: If it is an air leaking sound when the engine is running, it may be the result of a blocked exhaust system, leak, or problem. 'a rupture of the vacuum tube. If there are abnormal noises in the engine, this is usually a major fault. It is preferable that the ownerof the car send it to the factory for repair as soon as possible.
Why does the car make an abnormal noise when starting?
1. The transmission makes an abnormal noise. The car made an abnormal noise when idling, but it went away when the clutch pedal was depressed. This turned out to be due to worn gearbox bearings.
2. Abnormal noise in the engine compartment. Engine vibration and noise are common and normal. But if it's a loud squeal coming from the belt, it's usually caused by belt slippage; If it is a high-pitched noise from rubbing metal parts, it is usually caused by damage to the bearings of the generator, water pump and power steering. pump.
3. The steering wheel makes an abnormal noise. This situation is usually caused by friction between the steering stem and the ball joint's aged rubber sleeve.e.
4. Abnormal suspension noise is usually caused by the aging and falling of the rubber bushings between the shock absorber and each connecting rod.
When the release bearing is damaged, the clutch plates will not be completely separated, which will eventually lead to abnormal noises when accelerating the vehicle.
Regarding the problem of abnormal noises in cars, it is difficult for ordinary car owners to distinguish which are faulty noises and which are reasonable noises. If you go to a repair shop to check for an abnormal noise, only about 20% of cars actually have a problem. There is obviously a difference between the noise of a model equipped with a turbocharged engine and the noise of a naturally aspirated engine; models equipped with a crankcase may also produce noise due to friction, some car ownerss can be affected by their own; noise after contacting different cars. Lack of understanding of mechanical knowledge makes it difficult to identify abnormal car noises to avoid wasting time and energy.
2. How to identify car noises:
In actual work, due to the limitations of working conditions, it is difficult to measure car noise using special instruments. by measuring noise in daily life. Use judgment when describing and comparing car noises. For example, the "squealing" noise caused by dry friction of the bearing, the "clicking" noise produced by excessive valve clearance, which is similar to the "clicking" sound of a small hammer hitting the ground in cement, etc.
1. Correctly distinguish between normal and abnormal sounds.
When the car is running, the vibrations of various mechanisms will emits sounds of different natures, but the sound does not mean that the car is defective. In order to avoid unnecessary disassembly, you must first distinguish what is normal. abnormal sounds and sounds. Normal vibrations of various system components (such as noise on the engine surface), gear impact noises when changing gears, intake and exhaust noises using gas as a work source, gear meshing noises, etc. are all normal sounds. Abnormal noises (abnormal noises) can be divided into light noises, normal noises and malignant noises according to their impact on car performance. Slight noises, such as the flashing sound of high-voltage electrical leakage, the slight rolling noise of bearings, etc., are generally small in volume, the degree of wear of the parts is not large, and it does not There is no significant change for a long time. Such defects can stillmaintain the car without repair normal driving.
3. When diagnosing abnormal car noises, attention should be paid to creating good auscultation conditions and trying to eliminate interference from other noises so as not to affect the accuracy of judgment.
It is best to consciously amplify or reduce the sound, that is, use a screwdriver or other metal rod as a stethoscope to contact the sound part to amplify the sound , or use a single cylinder to cut off the fire to reduce the sound, to meet the diagnostic needs. The monitoring site must remain quiet to minimize human interference.