According to your question, this is the noise caused by friction between the belt and the pulley. If you pour a little water on it, the noise will only be temporary. The noise will start again once the engine starts. has been working for a while. If the belt is loose, there will be a loud noise when the motor accelerates or when the electrical charge is at its maximum. Unless the belt is too loose or is old and hard, there will be a constant friction noise. From your description it sounds like the belt is aging and hardening, so you can fix the problem by replacing the belt.
How to solve abnormal car belt noise
Determine whether it is the noise of the cylinder block. Otherwise, it can be determined. be linked to the car's starting system.
When checking, check whether the belt is broken or has burrs; pay attention to whether the position of the starterur is deviated, or if the belt connecting the starter motor is aging or twisting.
Timely inspection and maintenance, as well as minor car problems should not be ignored.
Detailed information:
It is best to use antifreeze all year round. In addition to antifreeze and cooling functions, antifreeze also has cleaning, rust removal and anticorrosion functions, thereby reducing corrosion of the water tank and protecting the engine. Be careful to choose the right color of antifreeze and not mix them.
The function of the brake system is closely related to brake oil. When inspecting and replacing brake pads, pads and other hardware, remember to see if you need to add and replace brake fluid.
To ensure that the car runs smoothly, check the transmission oil frequently, whether it is gear oil or automatic transmission oil. Pay attention to the type of oil, which is usually high.
References:
A way to judge the abnormal noise of the engine belt
Step 1: If there is an abnormal noise in the engine compartment of the car, it means that the belt is generally loose or of poor quality. , so check the motor belt first. If there are many belts in the car, we cannot know which one is defective. You can start the car and pour water on the belt. If the abnormal noise disappears, there is a problem with the belt. We can see if it is loose or poor quality.
Abnormal noise coming from the neckmotor wheel. Water is poured in to increase its viscosity, which actually increases the viscosity of the belt. But once the water dries, the belt will return to its original shape. This is the principle of belt watering.
Step 2: We can also judge which belt has problem by listening to the sound. If there is a problem with the steering wheel, there may be a problem with the steering pump belt. If there is an abnormal noise when the car starts cold, there may be a problem with the engine belt, and we can check it step by step.
A method for determining and resolving abnormal engine belt noise faults
1. The engine belt squeals.
This is because the joining surface of the belt and pulley is relatively smooth. This usually happens when the engine speed changes quickly. Sometimes the load on belt-driven accessories increases, which mayThis may cause the belt to slow down.
A squeaky belt usually means that the coefficient of friction on the belt surface has been significantly reduced and the belt is excessively worn. If there is noise when the vehicle is loaded, you may want to observe one of the drive belts and notice that the resistance or elasticity of the automatic belt tensioner or tension wheel of the belt will increase abnormally.
Most automatic belt tensioners have a set of belt wear length indicators on the slider located between the bottom of the belt tensioner and the tensioner arm. The mark consists of a pointer and two or three marks indicating the working range of the belt tensioner. If the pointer is outside of this range, the belt may be overstretched and needs to be replaced. On cars without belt tensionerautomatic, use a standard belt extension gauge and measure halfway between the two pulleys. If it differs from the standard value, it is better to replace the belt.
2. The motor belt makes a long-term squealing or high-pitched noise
Although the surface of the pulley is stained with sand and other dirt or the worn belt is installed upside down, the The belt will make a long-term high-pitched noise or squeal, but this is usually caused by poorly assembled auxiliary devices.
If the noise occurs in a new car that has not been driven for a long time, it may be caused by poor quality of the original equipment. Check the visual elements that you think could be causing the malfunction. If the above noise occurs in an old car, then you should consider whether you need to completely replace some of the associated accessories of its drive unit.t auxiliary. Carefully examine accessories that could have been delicately replaced (such as generators, auxiliary steering pumps, etc.). ) and check if their mounting brackets are secure, which can also cause misalignment of the pulley assembly.
Dust or sand between the pulleys and pulleys can also cause loud noises, so if the car is used in a dirty environment, check the surfaces of all pulleys for dust.
Take the example of the timing belt. It must be adjusted immediately after installation. This is why the direction of rotation of the timing belt must be marked. If the timing belt was installed backwards during other maintenance, you will hear a high-pitched squealing sound when the belt is running.
Try reversing the direction of installation of the belt to see if the fault disappearslaughs.
3. The motor belt makes a whistling, clicking, roaring, or chirping sound.
A persistent whistling or clicking sound that increases with engine speed usually means that the auxiliary rotating mechanism bearings are starved of oil.
Using a stethoscope, we can hear these noises more. Next, remove the drive belt and turn the suspected defective part by hand. If it is difficult to turn or the noise is rough or crackling, do not hesitate to replace the bearings or corresponding parts. However, it should be noted that every time you replace the parts of the auxiliary transmission accessories, remember to replace the leather. With elastic wheels and automatic elastic device.
As the engine speed increases, the continuous roar gradually turns into a whine, indicating that the corresponding bearing will soon collapse.born.
4. Engine belt rumble
Rumble is a typical noise caused by belt vibration, especially when the auxiliary mechanism transmission system is running and when the engine reaches a certain speed, the noise will increase considerably. The cause of this failure is usually that the drive belt is too loose, too tight, or the belt tensioner and elastic pulley are damaged.
If the car engine belt is abnormal during the warranty period, it is recommended to contact the 4S store as soon as possible to negotiate repairs. Once the warranty expires, you may have to pay for repairs at your own expense. Engine belts are automotive wear products and must be replaced regularly. Replacing the engine belt on some models is very complicated.