Why does the pulley make a squeaking noise when starting the 307 car from cold?

Introduction 307 What is the reason for the pulley squealing when starting the car when the car is cold? In most cases, abnormal belt noise is caused by the belt being loose. When this happens, it is best to go to a repair shop to adjust the belt tension.

Why does the pulley make a squeaking noise when starting the 307 car from cold?

In most cases, abnormal belt noise is caused by a loose belt. When this happens, it is best to go to a repair shop to have the belt tension adjusted, as the belt will slip and squeal. Once the belt slips, it will extend further due to high friction and the slippage will become more serious, leading to a vicious cycle. Therefore, quick adjustment of belt tension is essential. If you have driven almost 20,000 kilometers and have never changed the belt before, you should in principle change the belt now. Don't wait until the belt breaks to replace it, otherwise you'll be in big trouble.

What should I do if the car belt makes an abnormal noise?

A way to judge the abnormal noise of the engine belt

Step 1: If there is abnormal noise in the engine compartment of the car,This means that the belt is usually loose or of poor quality, so first of all check the engine belt. 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 engine belt. 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 is cold started, there may be a pproblem with the engine belt, and we can check it step by step.

A method for determining and resolving abnormal engine belt noise problems

1. The engine belt squeals.

This is because the joining surface between the belt and the pulley is relatively smooth. This usually happens when the engine speed changes quickly. Sometimes the load on belt-driven accessories increases, which can also cause the belt to idle.

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 abnormallyaly.

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 an automatic belt tensioner, use a standard belt tensioner 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 causedby 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. examineA visual component that you think could be causing the malfunction. If the above noise occurs in an old car, then you must consider whether you need to completely replace some of the associated accessories of its auxiliary drive unit. Carefully examine accessories that could have been delicately replaced (such as generator sets, 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 for dust.era on the surfaces of all pulleys.

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 disappears.

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 harsh oIf it crackles, do not hesitate to replace the bearings or corresponding parts. However, it should be noted that whenever you replace parts of the auxiliary transmission accessories, remember to replace the belt elastic pulley and automatic elastic device.

As the engine speed increases, the continuous roar gradually turns into a whine, indicating that the corresponding bearing will soon fail.

4. Engine Belt Rumble

Rumble is a typical sound 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 courtcar engine king 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. It is better for car owners to go to a repair shop or 4S workshop for replacement.

Beijing Hyundai Langdong generator belt makes abnormal noise, why does it still make noise after replacing the belt?

The car often does not start for several minutes if it is not driven frequently. , it is recommended to start it every one to two weeks. Start the engine then drive a certain distance. It is better not to browse lesss of 20 meters. This allows the alternator to recharge the battery, lubricate internal engine and transmission components, and prevent tire punctures.

If the car is parked for a long time, the oil in the gearbox and engine cannot circulate, so the parts of the gearbox and engine cannot be completely lubricated.

If the car is parked for a long time, some parts of the gearbox or engine may corrode.

Therefore, start the engine and drive a certain distance from time to time to lubricate the engine and gearbox.

The battery cannot be charged when the car is parked for a long time, so the engine must be started regularly to charge the battery.

Once the engine is started, the engine will run the generator. At that time, the generator can charge the battery.

When starting the engine to charge the battery, try to turn off electronic devices that are not in use in the car.

If the car is not used for a long time, you can disconnect the negative terminal of the battery to prevent the battery from losing power.

If the battery loses power, it will impact its lifespan.

If the battery loses power, the engine will not start. If the battery loses power, you can use a special charger to charge the battery.

What to do if your car gets water?

1. If there is water in the car, it will not have much impact. You just need to open the windows completely. dry the car when the weather is nice.

2. Water enters the cabin. The maintenance process mainly involves cleaning the water accumulated in the cabin. There are several sealing plugs located inns the lower part of the vehicle chassis. water accumulated in the compartment. However, because the floor glue of the car interior decoration material strongly absorbs water, the floor glue should be removed and placed in a spacious space to facilitate water evaporation.

3. If there is still moisture in the car, be sure to turn on the air conditioner and set the vehicle cycle switch to internal circulation so that water vapor in the car can be evacuated out of the car. via the air conditioning system. This is a very rapid dehumidification method in summer.

4. When it rains, it is easy to bring dirt and mud into the car. Once the weather is good, you should first remove the removable interior such as floor mats and seat covers from the car. dry and clean. Carpets that are not too dirty can be vacuumed directly. For dirtier carpets, youcan only use special detergent.

5. Clean the dust first, then spray an appropriate amount of detergent for scrubbing. It should be noted that the carpet should not be completely soaked and scrubbed in water. On the one hand, this would destroy the adhesion of several layers of different materials inside the carpet. On the other hand, the carpet would not dry out for a while. long time, which will affect the use effect and cause damage in the car. (Photos/Text/Photos: Q&A Calling the Beast) @2019

The car belt is squeaking, just pour a little water on it and everything will be fine! But the problem persists on the next startup!

Hello, the problem you mentioned is normal. When it is cold in winter, the generator belt becomes hard in the morning, this reduces the battery voltage, so the generator has a high load and the belt slips. easily, when the starter is off,energy consumption decreases and energy production decreases. Therefore, the sound of the belt sliding disappears, so you can't tell anything at all. However, you need to tighten the generator belt. I hope this can help.

Check if it is the noise of the cylinder block. Otherwise, it can be determined that it is related to the car's starting system.

During inspection, check whether the belt is broken or has burrs; pay attention to whether the position of the starter is deviated, or whether the belt connecting the starter is aged or bent; check the engine at idle;

Timely inspection and maintenance, as well as minor car problems should not be ignored.

Detailed information:

Car maintenance knowledge:

Antifreeze It is best to use the agent all year round. In addition to the functionsantifreeze and cooling, antifreeze also has cleaning, rust removal and anti-corrosion functions, thereby reducing corrosion of the water tank and protecting the engine. Be careful to choose the right color of antifreeze and not to 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.

Reference materials:

Baidu Encyclopedia-Car Fault Diagnosis

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