What s going on with the car engine fan suddenly getting a lot louder?

In general, the vehicle's fan is activated to cool down in the middle of the water temperature.

Frequent starts mainly depend on the road conditions - if it is in the urban area, then frequent starts are normal. Because the frequent stop-and-go of the vehicle causes the engine to overheat and the fan starts as a safe protection. If it's on the highway, it's not normal.

If the sound is loud, it depends on what kind of sound it is, and if it is very soft and even, don't worry. If it's big and noisy, it's good to see if there is a problem with the fan blades.

If the noise varies with the speed of the crankshaft (engine speed), the noise may be related to the crankshaft, connecting rods, pistons, and piston pins. If the noise heard varies with the camshaft speed (half speed of the engine), the noise may be related to the valve transmission components.

Extended Information: Fan Function: Increases the velocity and flow of air through the radiator to enhance the radiator's ability to dissipate heat and cool engine accessories.

Installation position: The fan is mostly axial flow, installed between the engine and the radiator, and coaxial drive with the water pump. The fan is screwed on the pulley or flange disc at the front end of the pump shaft.

When the electronic fan rotates at high speed, the sound is indeed relatively loud, if the sound is louder than before when running at low speed, it is a problem with the bearing of the fan, if it is still accompanied by vibration, it is necessary to check whether there is something stuck on the surface of the fan or whether the balance weight on the fan blades is gone. Hope.

The sudden loudness of the fan in the car engine may be due to the wear of the fan bearings.

This kind of sound is more annoying, but it is not easy to really solve it, which is related to the balance of the fan's belt or wind page, perhaps with the heat sink is dirty and the heat dissipation is poor, which affects the air intake, causing the electronic fan to increase the speed, resulting in increased wind noise, this problem does not affect daily use. It is recommended that you clean the radiator and fan page, and check whether the fixing screws of the fan are loose.

The fan of the car is particularly loud, and the solution is to do a maintenance of the fan motor, open the copper sleeve or bearing, and then fill it with butter. Observe the tank and surrounding components to see if the bearings are overworn. Check that the fan blades of the cooling fan are not caught by foreign objects.

Otherwise, the fan will be damaged; Check the lateral and longitudinal clearance of the motor's rotor shaft. If there is no problem, remove the motor and fan and check that the fan blades are not deformed. If there is no problem, turn on the motor and see if the rotor is rubbing against the stator.

1.Many times, car noise is caused by the engine. After all, the engine vibrates when it is running, and then it makes noise.

Therefore, we can install sound insulation materials around the engine to absorb the noise generated by the engine and naturally reduce the transmission of noise. But when installing sound insulation, don't neglect engine cooling.

2.The loud noise of the steam fan during driving is generally not due to the fan. Normally, the vehicle's fan will start cooling down when the water temperature reaches halfway.

The loud sound of the car cooling fan indicates that the fan speed is high, so it must be the engine water temperature is high. You can check this first! Secondly, it is also possible that the water temperature control box of the fan start control is interfered with by the xenon headlight ballast, and mistakenly thinks that the water temperature is too high and activates the electronic cooling fan.

The car has been traveling for too long, the screws are loose, and there is a rotation deviation. Too much dust, and so on. If this is the case, then we need to clean and reinforce the fan once.

There is also a situation where the track bearings of the car fan are damaged, or the fan blades fall off and dry out due to lack of oil. Then we need to refuel the fan or find a professional repairer to help replace it with a better car cooling fan.

3.For cars that have been overhauled or the engine has been dismantled, it is important to check whether the blower is installed firmly, whether the refixing screws are loose, and then tighten with a screwdriver. In addition, there is also the possibility that the temperature detected by the engine water temperature sensor is too high, because the fan will automatically rotate most frequently to dissipate heat after driving without stopping for a long time.

The most common reason is that the friction is relatively high, and the bearing of the fan is jammed, so there will be noise. At this time, we only need to add some oil to the bearing for lubrication. The above is the answer to the problem that the fan of the car is particularly loud, how to solve this problem.

The loud fan of the car may be because the fan of the car air conditioner has foreign objects, or it may be because the scattered parts are more seriously worn, and the parts of the fan can be replaced, or cleaned up.

The car fan can be repaired, the fan blade of the car fan can be repaired, and the car fan can also be replaced, so that the problem of fan noise can be solved.

Frequent cleaning and maintenance may be due to severe wear and tear and the need to replace the fan and carry out some lubrication.

The car cooling fan is loud and buzzing, which may be caused by the following reasons:

1. The air conditioning filter is very dirty, resulting in excessive noise and abnormal noise;

2. There are debris on the fan blades of the blower in the air conditioning system, resulting in abnormal noise;

3. The electromagnetic clutch in the compressor is damaged. The compressor is a high-speed component in the entire air conditioning system. At the same time, the requirements for the electromagnetic clutch in the compressor are also relatively high, and the tension of the compressor transmission belt, the belt tension is too tight, which will lead to the clutch pressure increasing and failing.

If the tension is too loose, it will cause the belt to slip and idle. The lubrication of the compressor is insufficient, and when part of it is not lubricated, it is easy to produce abnormal noise during operation.

4. The fan blades of the automobile air conditioner are deformed and the fan motor is damaged; Loose blower screws;

5. The clutch bearing in the air conditioning pump is worn, resulting in the engine becoming louder after the air conditioner is turned on;

6. It may also be that the voltage of the electromagnetic clutch is too low, resulting in abnormal noise.

The most common cause of loud and humming cooling fans is that the air conditioner filter is dirty or there is debris in the fan blades. We can replace the air conditioner filter, and then check whether there is any debris in the fan blades after the replacement, and if the car cannot be started, we can directly turn on the air volume of the blower to see if there is any sound and whether there is a problem with the blower. If the owner usually maintains the car, it can effectively reduce the possibility of failure.

Car air conditioners also need regular maintenance, and the maintenance methods are as follows:

1. Regularly check the refrigerant and refrigeration oil. Insufficient refrigerant will lead to poor refrigeration results;

2. Clean the surface of the condenser. The surface of the condenser is covered with debris such as insect dust, which will reduce the heat dissipation efficiency and affect the refrigeration effect.

3. Clean the surface of the evaporator.

4. Replace the air conditioner filter in time. If it is not replaced for a long time, the dust on it will become more and more and more, and it may enter the car and affect people's health.

While driving, when we turn on the air conditioner, sometimes there is a sound every once in a while. In this case, it is the sound of the compressor when it is running, but it is also possible that the abnormal noise is caused by the failure of the air conditioning system.

This may be due to a problem with the internal structure of the air conditioner, a malfunction of the function, or a large number of miles driven.

This may be due to a malfunction in the car's cooling system, so when this happens to the car, be sure to send the car to a professional repair shop for repair, and don't bring unnecessary trouble to yourself.

Because the weather is very hot, the air conditioner has no way to dissipate heat in time, so it will cause abnormal noise.

It may be that the bearing is overworn; Observe the tank and surrounding components to see if the bearing is overworn, and if so, replace the bearing; Check whether the fan blades of the cooling fan have rubbed against anything, if not, it should be that the fan is broken, and you can replace the fan bearing or coupler.

It is caused by the high water temperature, as long as the water temperature reaches a certain standard, the fan will definitely be activated to lower the temperature.

It may be because your car often stops and goes back and forth, and the temperature is relatively high, so this phenomenon will occur.

The air conditioning filter has not been replaced for a long time, resulting in a lot of impurities adsorbed on its surface, resulting in a large abnormal sound at the fan when the vehicle is driving, and there are debris in the fan blades of the blower, which leads to abnormal noise from the fan when working, and the deformation of the fan inside the air conditioner, which leads to the appearance of abnormal noise.

In the front of the car, there are condensers, water tanks, etc. At the back of the tank there is a cooling fan, which sucks air inward when working, which can speed up the airflow through the tank to help the tank dissipate heat. If the fan is louder, it means that the speed has increased, then it may be caused by the temperature of the antifreeze rising or the air conditioner being turned on, which is normal.

Precautions for car fans.

Because the car radiator affects the life of the car, especially in summer, it may lead to spontaneous combustion, so it is necessary to buy the best fan, and the heat dissipation effect is related to the wind pressure, only with the cooperation of air volume and wind pressure can the heat dissipation be completed together, and the speed of the fan should be adjusted accordingly after purchase.

In short, the purchase of car radiator fans should eliminate some inherent wrong thinking, according to the actual situation of their own car to choose, rather than blindly following the trend, in the purchase of car radiator fans to choose regular brand manufacturers.

If you wait until the water temperature is high before starting, the heat dissipation effect will not be so obvious, and there is even a danger of boiling the water tank. If the fan is really loud enough to be annoying, it is recommended to check it to be safe.

This could be due to a malfunction in the car's fan, or something stuck in the car's fan. So when this situation occurs in the car, we must go to a professional car repair shop to repair it, we can't solve it ourselves.

At this time, you need to check the bearing, and you can also check the water tank or other parts around, and then you need to check the fan for heat dissipation, and then you also need to check the fan blades, you can also go to the 4S shop for inspection, and then repair.

Then you should go to a professional repair point to repair, indicating that the noise of the car is too loud, and there must be a problem with which part.

Turn the fan down a bit. Because the car is running normally, the fan is very loud, and the air volume is too large, so it should be turned down a little.

You can put some lube on some of the fan's bearings. This will improve the rotation of the fan and reduce noise.

I think in this case, we can choose a silent device to disperse, so that the blow is very cool, and it will not affect our driving.

It means that there is a problem with the car, and at this time you should go to a professional repair shop to repair it, so that you can reduce the sound.

In this case, I think you can turn off the fan, or you can choose to turn on the air conditioner so that there is no sound.

Turn on the air conditioner, the bigger the fan, the louder the humming sound, why:

1. The leaves of the exhaust fan inside the air conditioner are deformed, and it is recommended to replace the exhaust fan.

2. The motor of the exhaust fan inside the air conditioner is broken, it is recommended to replace the exhaust fan.

3. There are many stolen goods in the air conditioner, so it is recommended to clean the air conditioner.

Car fans are generally used to dissipate heat from the water tank.

By model, the economical one is a big fan. Luxury cars generally have two small fans. Luxury car fan Feed water tank cooling Air conditioning box in front of the water tank.

The air flow driven by the fan work helps the water temperature drop, but the water temperature is not as low as possible, the engine temperature is too low, and of course, the thermostat water pump and so on work together, so it must reach a certain temperature before dissipating heat.

Automotive air conditioning device (hereinafter referred to as automobile air conditioner). It generally includes refrigeration units, heating units and ventilation units. This kind of combined device makes full use of the limited space inside the car, has a simple structure and is easy to operate, and is an internationally popular modern automobile air conditioning system.

It is used to adjust and control the temperature, humidity, air cleanliness and air flow in the car compartment in the best state, provide a comfortable riding environment for the occupants, and reduce the fatigue of the journey; Ventilation devices that create good working conditions for drivers and play an important role in ensuring safe driving.

First of all, let's understand the principle of air conditioning and refrigeration

The low-pressure steam of the refrigerant in the refrigeration system is sucked in by the compressor and compressed into high-pressure steam and then discharged to the condenser, and the indoor air is continuously circulated to achieve the purpose of reducing the temperature.

To put it simply, it is the same as the refrigeration principle of household air conditioning that we are familiar with. It is based on the principle that R12 or R134A is compressed and released, and the volume expands sharply at the moment to absorb a large amount of heat energy for cooling (R134A is mostly used in automotive air conditioners).

Automotive air conditioners are divided into four major parts, namely condenser, evaporator, compressor and throttle expansion valve.

After understanding the principle of air conditioning and refrigeration and some main components, let's analyze the air conditioner is not refrigerated when idling, but what are the common fault points of air conditioning refrigeration when driving.

1.The refrigerant in the air conditioning system leaks out, resulting in no refrigerant, so the air conditioner is not cooling.

Solution: You can check whether the pipes, air conditioning pumps, condensers, evaporation tanks and other parts in the air conditioning system are damaged and cause refrigerant leakage. There is also an inspection method to add fluorescent agent at the same time as adding refrigerant, the vehicle uses a special fluorescent lamp to check the air conditioning system after a week, if there is a leak point will glow, it means that the part is damaged.

2.Damage to the inside of the air conditioner pump, such as damage to the piston ring inside the air conditioner pump, damage to the clutch suction cup, etc. As a result, the air conditioning pump cannot work and thus cannot start the refrigeration effect, and the general air conditioning pump will be damaged and abnormal noise.