Haima 3 car engine compartment belt near the squeak 20

**I can't hear which part of the sound, I personally think it may be the sound of a pulley, I don't know if it is a hot car ring, after a while it will not sound? If there is always this sound, it is not normal, go to the 4S store to check,

The engine will make some noise when it is running, and it should be normal as long as it is within the permissible range. When the parts change in cold and heat, because of the size of the gap and the quality of lubrication, some noise will be emitted, and it is normal for the sound to disappear or decrease after the car is heated. If some sounds gradually worsen, they are already damaged sounds, and they should be repaired as soon as possible.

It could be a problem with the pump, or a slippery belt.

1.The timing belt will become loose after a period of use, and when the timing belt cannot fit the gear completely, there will be a severe whistling sound when the cold engine starts. If there is an abnormal sound in the belt, we can try to solve it by adjusting the tensioner wheel or replacing the belt.

When the engine is running smoothly, this abnormal noise will disappear automatically. In fact, this is not a big problem, and you only need to replace the aging timing belt regularly, which can be avoided to a large extent.

2.It may be because the belt slips on the generator, and the belt and the pulley rub and vibrate violently, making a certain frequency of sound. Apply the polyol solution to the surface of the belt and moisturize it sufficiently, which can reduce the hardening and freezing of the belt in winter, so as to maintain a certain elasticity and reduce the phenomenon of slippage and high instability.

It is enough to apply it once for a new car, and if the belt is older, it needs to be applied for 3 days in a row.

3.The belt drive accessories are affected by other hardware, such as if the bearing is damaged or stuck, the power of the belt drive accessories will increase, and the belt will be overworked, and the belt life will be affected for a long time. Stove thought and.

4.It may be due to the reduction of the friction coefficient on the surface of the belt, the belt has been excessively worn, the owner needs to check and replace it in time, if it is a sound when the vehicle is loaded, the owner can observe one of the groups of transmission belts, through observation, it can be found that the automatic tensioning device of the belt is abnormal, at the bottom of the belt automatic tensioner there will generally be a belt wear length indication sign, if the pointer is out of range, it means that the belt has been worn and hidden excessively, and the owner needs to replace it in time, Avoid more breakdowns while driving, affecting driving safety. If there is a problem with the air conditioner compressor belt, if there is an abnormal sound in the cold start, it may be a problem with the engine belt, and in this way, the abnormality of the belt can be roughly judged.

This is because the joint surface of the belt and pulley is relatively smooth. It usually occurs when the engine speed changes rapidly, and sometimes the load on the belt-driven attachment increases, which can also cause the belt to run dry.

On the issue of abnormal noise of automobiles, it is difficult for ordinary car owners to distinguish which ones are abnormal noises and which ones are reasonable abnormal noises. Only nearly 20% of the vehicles that went to the repair shop to detect abnormal noises really had problems. In the case of a model with a turbocharged engine, there is a must be a difference between the sound and the sound of a naturally aspirated engine; Models with engine guards may also make noises due to friction; After some car owners come into contact with different cars, it is likely that due to their lack of understanding of mechanical knowledge, they mistake reasonable abnormal noise as a vehicle failure.

Therefore, learn to distinguish the abnormal noise of the car and avoid wasting time and energy.

The identification of car noise is limited, and it is difficult to use special instruments to measure the sound of the car, and the sound of the car can only be described and compared with the judgment of the sound in daily life. For example, the "rattle" sound caused by the dry friction of the bearing, and the "click" sound similar to the small hammer hitting the cement floor caused by the excessive valve clearance.

1. Correctly distinguish between normal sounds and non-normal sounds.

The vibration of each mechanism in the work of the car will make a variety of sounds, but the sound does not mean that the car is faulty, in order to avoid unnecessary disassembly, first of all, the socks must be balanced to distinguish between normal sound and abnormal sound. The normal vibration sound of each system component (such as the noise on the surface of the engine), the impact sound of the gear when shifting, the air intake sound and exhaust sound of using gas as the working source, and the gear meshing noise are all normal sounds. Abnormal noise (abnormal noise) can be divided into slight noise, general noise and malignant noise according to the impact on the performance of the car.

Slight noise, such as the flashover sound of high-voltage electric leakage, the slight loose sound of rolling bearings, etc., the general volume is small, the degree of wear of the parts is not large, and there is no significant change for a long time, and this kind of fault can still maintain the normal operation of the car without repair.

3. When diagnosing abnormal noise, attention should be paid to creating good auscultation conditions and trying to eliminate the interference of 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 screw or other metal rod as a stestological instrument to contact the sound part to amplify the sound, or use a single cylinder fire cut-off to reduce the sound to meet the diagnostic needs. The auscultation site should be kept quiet to minimize human interference.

1. The engine has abnormal noise.

Symptom description: There is a lot of abnormal noise in the engine compartment, and most people also judge it to be the abnormal noise of the engine compartment by the sound**, which is usually a metal screeching sound or a howling sound.

Solution: The abnormal engine noise indicates that the technical status of a certain mechanism of the engine has changed. It is mainly caused by excessive wear and tear of some parts or improper assembly and adjustment.

Some abnormal noises can still predict that the engine will be damaged accidentally, so when the engine has abnormal noise, it should be repaired in time to prevent the fault from expanding.

It should be reminded that if it is an abnormal noise in the engine, most of the owners will not be able to solve it by themselves, and it is best to send it to the factory for maintenance.

2. There is abnormal noise in the gearbox.

Symptom description: If there is a "rustle" sound inside the gearbox while the car is driving, and there is no more after pressing the clutch or accelerator, there will be a whistle-like sound when changing gears.

Solution: There are many transmission parts, and the reasons for the sound are more complex, so we should pay attention to whether it is related to a specific speed, such as some planetary teeth that sound at about 50km h.

Whether it is related to certain gears, which is very important for judging the failure of the transmission, if a certain gear sounds, it must be related to the components that affect the transmission of the gear; If all gears sound, it is often a common meshing shaft failure or a lack of oil in the transmission. Whether it is related to specific actions, such as increasing and decreasing gears, starting, rapid acceleration, sharp deceleration, turning, etc., are effective means to judge abnormal noise, among them, changing speed and direction are particularly important for judging the rear axle fault.

If the abnormal noise of the transmission is obvious, it is recommended to send it to a professional repair shop to check the faulty parts, and then replace them.

3. There is abnormal sound of wear.

Symptom description: When driving on the accelerator or brake, there is always some abnormal noise in a certain part of the body, the sound is not loud, and it does not affect normal driving, but it always makes people worry a little about the failure of the body.

Solution: The abnormal noise of the door is mainly caused by the lack of lubrication, but it is necessary to judge whether it is the position of the door hinge or the glass regulator, door lock mechanism, handle mechanism, etc. inside the door. In the case of door hinges or limiters, special door hinges and slide grease can be used, while special door attachment grease is used for lubrication of glass regulators, door locking mechanisms, handle mechanisms, etc. inside the door. In terms of brand selection, try to choose the commonly used brands in 4S stores, such as German Marty, Kluber, Tiger Head Hotolube, Fox, etc.

It is not advisable to use engine oil or ordinary butter, it will freeze in winter, and the harmful smell will affect your health.