Pacific Automotive Network If you hear an abnormal "sizzling" sound while driving, it may be due to a problem with the engine belt, because the abnormal "sizzling" sound is mainly caused by the different groups of engine belts. Aging or problems with the tensioner pulley can cause the belt to become too loose, leading to friction, abnormal noises, belt slippage, etc.
Expand all If you hear an abnormal "sizzling" sound while driving, it is the abnormal sound caused by an engine belt problem, because the abnormal "sizzling" sound is mainly caused by various parts of the engine. The belt set is aging or the belt is too loose due to a tensioner pulley problem, causing abnormal friction and noise, belt slippage, etc. If there is a similar abnormal "sizzling" sound, check for major belt clearancess. and tensioners inside the engine. Tight pulleys, such as engine timing belts, generator belts, circulating water pump belts, air conditioning belts, booster pump belts, etc. The problem causing this abnormal noise is the abnormal noise of the motor belt. because the joining surface of the belt and pulley is worn due to smoothness. This usually happens when the engine speed changes quickly. Sometimes the increased load on belt-driven accessories also causes belt noise. How to solve the problem of abnormal noise in the motor belt
1. Check belt-driven accessories for damaged bearings, stuck, loose or increased power of accessories.
2. Replace the belt or use #100 gauze to polish the joint surface of the pulley and belt (alight sanding is enough).
3. As a temporary solution, you can drop 1-2 drops of engine oil on the joint surface of the belt and pulley (this will not affect the slippage of the belt). The belt is the one that should be dropping oil onto the belt. If the generator belt is making noise and it becomes more obvious after turning on the headlights, you need to remove the generator belt and rotate the generator pulley to see if the generator turns smoothly. If the generator is working normally, you can check it. Is the battery no longer storing electricity, as poor battery storage will increase the load on the generator. The above is the relevant content on the causes of abnormal noise in the engine belt and how to solve the problem. I hope this will be useful to you !
In most cases, abnormal noise coming from the belt is caused by a problem.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 change it now. Don't wait until the belt breaks before replacing it or 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 an abnormal noise in the engine compartment of the car, it means that the belt is usually loose or poor quality, so first checkthe 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 of the motor belt, pouring water is equivalent to increasing 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 determiningand solve the problem of abnormal noise of the motor belt
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 loading the vehicle, 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 length indicators ubelt 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 caused by poorly assembled auxiliary devices.
If the noise occurs in a new car that has not been drivenfor a long time, it may be caused by the 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 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 the surfaces of all pulleys for dust.
Take the example of the timing belt. She must bee 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 as engine speed increases usually means that the auxiliary rotating mechanism bearings are low on 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 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 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 tocontact 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.