What s the reason for the abnormal noise on the belt of the car? Especially when the car is cold, it

It should not be the belt, but the sound of the bearing grinding due to lack of oil.

The presence of most common squeaks and squeaks in an engine depends on the state of the engine's rpm.

1. Abnormal noise only exists when it is running at idle speed or low speed. The reasons for the sound are: the gap between the piston and the cylinder wall is too large; The piston pin assembly is too tight or the connecting rod bearing is assembled too tightly; The gap between the tappet and its guide hole is too large; The profile of the valve cam is worn; Sometimes, the starter grip comes loose and the pulley makes a sound (noticeable when the speed changes).

2. The sound is disordered when maintaining a certain speed, and a short sound is made successively when decelerating sharply. The reasons for the sound are: the camshaft timing gear is cracked or its fixing nut is loose; crankshaft breakage; The piston pin bushing is loose; The axial clearance of the camshaft is too large or its bushing is loose.

3. The abnormal sound occurs when the engine accelerates sharply, and the sound still exists when maintaining high-speed operation. The reasons for the sound are: the connecting rod bearing is loose, the bearing is burned or the size does not match and rotates; loose crankshaft bearing or bearing burning capacity; The piston pin is broken; crankshaft breakage;

How to judge the abnormal noise of the engine belt:

The first thing to do is to check the engine belt. If there are multiple belts in the car, you can not judge which belt is the problem, you can start the car first, and then pour some water on the belt, if there is an abnormal sound to disappear, it means that the belt is a problem, you can see whether it is loose or the quality is not good.

If the engine belt makes abnormal noise, pouring water is to increase its viscosity, which actually improves the viscosity of the belt. But when the water dries, the belt will return to its original state, which is the principle of belt watering.

Why does the belt make an abnormal noise when the car starts? What are the reasons for this?

The engine belt creaks because the joint surface of the belt and pulley is relatively smooth. It usually occurs when the engine speed changes rapidly, and sometimes the belt rings when the load of the attachment driven by the belt increases. The squeaking sound of the belt generally means that the friction coefficient on the surface of the belt has been greatly reduced, and it has been excessively worn.

If you make a noise when the vehicle is loaded, you may wish to observe one of the transmission belts and you will notice an abnormal increase in resistance or elasticity on the belt tensioner or belt tensioner.

Precautions for car belts.

The owner should observe the aging and wear of the belt, if the wear is more serious or the degree of aging is relatively high, then it should be replaced in time, continued use may cause very large safety hazards, but also will affect the normal life of the owner.

It must be noted that the tension of the belt should not be too large, too much tension will cause certain damage to the components, so the appropriate tension is very necessary.

It means that the belt should be replaced, there is moisture on rainy days, resulting in water vapor attached to the belt, and the fit between the aging and the pulley is not tight, and there is a precursor to slipping!

Hello, this is a normal situation, on a rainy day, the belt is skidd, squeaky due to water [car questions, ask the car master. 4S shop professional technician, 10 minutes to solve. 】

Hello, in this case, please check all the belts on the engine for too loose or aging!

Please readjust the belt tension or replace the belt directly!

Hope it helps! Have a nice ride! [Car questions, ask the car master.] 4S shop professional technician, 10 minutes to solve. 】

The belt tension is not enough, it slips, adjust the tensioner If it helps, please set it, thank you.

Hello, the belt is loose, when the weather is good, the belt is tight, it is loose as soon as it rains, it becomes longer, and when the weather is good, it is back in place, it doesn't ring, this is normal, or you can go to the repair shop to tighten the belt and it's fine, I hope it can help you, I wish you a happy life [car questions, ask the car master. 4S shop professional technician, 10 minutes to solve. 】

I don't know what level of repair point you go to, if they can't diagnose it, it may be really troublesome. Let me tell you what I think, I just replaced the generator belt, timing three-piece set. Although the symptoms you describe are not quite the same as mine, let's share my opinion and see if it helps.

First of all, what you see outside is the generator belt, not the timing. Generator belts.

Summary. Hello, happy to answer your <>

The reason why the car belt rings when it rains is that the rain will increase the moisture content in the air, which will increase the friction between the belt and other drive parts, causing the belt to slide. This sliding produces a rattle. On rainy days, there can be mud, dust, and dirt on the road surface, which can splash onto the belt under the engine cover as the wheels rotate.

These impurities can increase friction between the belt and other parts, resulting in a rattle.

As soon as it rains, the car belt rings.

Hello, happy to answer your <>

The reason why the car belt rings when it rains is that the rain will increase the moisture content in the air, which will increase the friction between the belt and other driving parts, causing the belt to slide. This beam sliding produces a sound. On rainy days, there can be mud, dust and dirt on the road, which can be splashed onto the belt under the engine cover as the slag stops the wheels from spinning.

These impurities can increase friction between the belt and other parts, resulting in a rattle.

On a rainy day, it squeaks, after a sunny day, and after two days, the sound gradually decreases, is this situation normal?

Kiss <>

Normally, the road is wet on a rainy day, which will affect the car belt.

Count, is there a big problem?

Kiss <>

No, oh, then I'm relieved, thank you.

It doesn't affect, I drive, it's safe, it's okay.

Affect driving, is it safe, teacher.

Kiss <>

It will not affect your driving safety.

Okay, got it, thank you.

Kiss <>

You can drive with confidence, and if there is still a lot of noise on a sunny day, change the belt of your car.

How to solve the abnormal noise of the car belt on a rainy dayHow to solve the abnormal noise of the car belt on a rainy day The reason for the abnormal noise of the car belt on a rainy day is the sound of the friction between the timing belt and the timing cover. Most often, it will also occur in a hot car, as long as the sound is not loud, it can be ignored and it will not affect the life of the belt; 2. The aging of the transmission belt will cause the vehicle to start the "crunch" sound, because the main component of the transmission belt is rubber, especially in the winter season, the rubber will become hard and brittle, and the friction coefficient will be reduced; 3. If the belt is excessively worn, it will also make a "squeak" sound.

The belt is rubber, and the friction will decrease after aging, and the power cannot be transmitted well, resulting in slippage. @2019

What happens to the abnormal noise of car pulleys on a rainy day? This is caused by the relatively smooth grinding of the joint surface of the belt and pulley. Generally, it occurs when the engine speed changes rapidly, and sometimes the belt rings when the load of the belt-driven attachment increases.

When the belt is old, it must be replaced, this kind of thing is irreversible. Avoid being unable to drive normally when it is broken at a critical time. In addition, if there is damage to the pulley or belt, it will also cause noise, so it needs to be replaced.

There may be some oil or dust sticking to the belt or pulley, causing the friction resistance to become larger, you can find some toothbrushes to dip some cleaning agent to brush it.

If the belt is loose or too tight, you can adjust the tension to solve the problem, you can loosen the generator screws and bucket imitation, and adjust the position. If the tightness is not suitable, the friction will intensify, the belt temperature will be very high, and after running for a period of time, the parking may smell burning.

If the belt slips, it needs to be adjusted in time, otherwise it will cause the belt groove of the pulley to wear out, and directly damage the pulley. (Photo by Dong Peng) @2019