The car was running on the highway, and suddenly there was a noise behind it, and after a while, it

Further inspection is recommended, there is a lot of noise from the car.

If you hear the abnormal sound of "Zizi" in the process of driving, and this is the abnormal sound caused by the problem of the engine belt, because the abnormal sound of "Zizi" is mostly the aging of each belt group of the engine, or the belt is too loose caused by the problem of the tensioner, the friction abnormal sound, belt slippage, etc., if there is a similar "Zizi" abnormal sound, then look for the major belt groups and tensioners inside the engine, such as engine timing belt, generator belt, circulating water pump belt, air conditioning belt, power pump belt, etc. The problem that causes this abnormal noise is the abnormal sound of the engine belt, which is caused by the smooth grinding surface of the joint surface of the belt and the pulley. 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.

How to solve the problem of abnormal noise of engine belt.

1. Check whether the accessories driven by the belt are damaged, stuck, loose or the power of the accessories has increased.

2. Replace the belt, or use 100 gauze to polish the joint surface of the pulley and the belt (light grinding is fine).

3. The temporary solution can be to drop 1 2 drops of oil on the joint surface of the belt and the pulley (it will not affect the belt slippage).

If it is the generator belt that rings and the headlights are more obvious, you have to take off the generator belt, turn the motor pulley to see if the generator rotates smoothly, if the generator is normal, you can check whether the battery is not stored power, because the battery storage is not good will increase the load of the generator.

It is a relatively common phenomenon for cars to have abnormal noise, because there are many parts, and it is inevitable that there will be aging and loosening. If there is an abnormal noise during driving, it is best to stop and check to make sure that it is normal before continuing to drive. If the noise is particularly loud, especially at the engine, don't continue driving.

Because the noise is caused by a problem with the mechanical part, continuing to drive may damage the vehicle and even affect safety.

1.The most common squeak is the sound caused by the installation of engine guards, especially some iron guards. Most of them are caused by the deformation of the guard plate caused by a slight drag over the bottom, and after the deformation of the guard plate, it is very close to the exhaust pipe, or even next to the exhaust pipe.

Because the exhaust pipe is suspended under the car, when the gas pedal is increased or when the road is bumpy, the exhaust pipe will shake, and after shaking, it will collide with the guard plate and make a strange sound. Therefore, if there is an abnormal sound at the bottom of the engine when crossing speed bumps or bumps, and when the gas pedal is being refueled, and the guard plate happens to be installed, the first thing to consider is the cause of the guard plate.

2.Abnormal noise from the tires while driving. There are generally two kinds of sounds:

Clicks and buzzes. When there is a clattering sound, listen carefully for which wheel rings, and if you can't hear it, check it all. There may be large screws stuck in the tire, or large stones stuck in the tire.

If it is a buzzing sound, then you can't deal with it, it may be the noise caused by the jagged wear of the tire, or it may be the damage of the wheel bearing, and you need to go to the repair shop for inspection in time.

The tires of the car make abnormal noises.

In most cases, when driving at high speeds, we will hear some slight abnormal noises from the tires of the car, such as the "click" sound. And when the body shakes or shakes, it is the abnormal sound of the tire, which means that there is a problem with the tire. Hurry up and get out of the car to check.

Generally, the screws are loose. If you don't check it in time, it is likely that the tire will automatically disengage. Serious conditions that lead to a car accident.

There was an abnormal noise on the chassis of the car.

The chassis of the car also has many important components underneath, such as gearbox, three-way catalytic converter, fuel tank, etc., which are laid out in the chassis. When we hear the sound of the chassis scraping the ground, it is usually a problem with the three-way catalytic converter.

It may be that there is a lot of carbon deposition that causes abnormal noise. If you don't get out of the car to check, if this is really a problem, it will cause the temperature of the three-way catalytic converter of the car to be too high, and the exhaust gas will not be discharged, resulting in the danger of bursting.

The brakes make a squeak and noise.

I don't know if you feel this way? When we are about to apply the brakes when we drive, we always make a screeching sound, which completely proves that the brake pads have reached the end of their life. Knowledgeable old drivers will quickly replace, and the cost of replacing brake deviations is not high, but the safety hazards are great, it will lead to brake failure, traffic accidents.

The normal life of the brake pads is within 60,000 kilometers, once it exceeds this kilometer, replace it decisively. Of course, in many cases, the abnormal noise disappears quickly, which may be caused by the erosion of the brake pads by rain on rainy days, so you can leave it alone. But there is always an abnormal noise, so it has to be changed.

The engine makes an abnormal noise.

The engine is the core component of the car, it is the heart, once we hear it make a strange sound when we drive at high speed, get out of the car and check it. Because it is generally a big problem, there are many reasons for abnormal engine noise, such as excessive carbon deposit, spark plugs, oil pumps, oil filters, etc.

Summary. Hello, I am your exclusive service technician, attentive, attentive and careful to help you solve the problem of using the car, after running at high speed, the car will have a loud noise, in this case, first check some of the chassis suspension, to see if the screws are loose, whether the suspension of the chassis is deformed. In the second case, check the engine to see if the oil level of the engine is normal and whether the quality is in good condition.

Hello, don't worry, I can ask for your question, but wait a minute, I need text for about 2 minutes.

After running at high speeds, the car will make a loud noise.

Hello, I am your exclusive service technician, attentive, attentive and careful to help you solve the problem of using the car, after running at high speed, there will be a loud sound, in this case, first check some chassis suspension, to see if the screws are loose, whether the suspension of the chassis is deformed. In the second case, check the engine to see if the oil level of the engine is normal and whether the quality condition is normal. Continental limb dates.

Please describe in detail what kind of noise it makes and where it is made.

As soon as I stopped at the end of the highway, I heard a loud noise.

If there is a sound at the moment of the parking brake, in this case, the main thing to check the brake pads is to see if the brake pads are stuck.

There will be a highway or a service area.

Is it the noise made in the engine room, or the noise made in the chassis suspension.

I can't tell.

What kind of sound is it like to block it?

Smack. In this case, the main thing is to check the brake system to see if the brake pads are stuck.

Usually there is no sound if you don't run at high speed.

If you run at high speed for a long time, the braking system is not used for short distances, and it is more likely to have the problem of jamming.

If I can help you, please give me a thumbs up Thank you!

When the clutch release bearing is damaged, the clutch plate cannot be completely disengaged, which eventually leads to an abnormal sound during acceleration.

On the issue of abnormal noise of automobiles, it is difficult for ordinary car owners to distinguish which ones are abnormal noises and which ones are reasonable abnormal noises. Only nearly 20% of the vehicles that went to the repair shop to detect abnormal noises really had problems. In the case of a turbocharged engine, there is a must be a difference between the sound and the sound of a naturally aspirated engine; Models with engine guards may also make noises due to friction; After some pure brother car owners come into contact with different cars, it is likely that they lack their own understanding of mechanical knowledge, so they can distinguish the abnormal noise of the car and avoid wasting time and energy.

Second, the car sound of the old and dry method:

In practice, due to the limitations of working conditions, it is difficult to measure the sound of the car with special instruments, and the sound of the car can only be described and compared with the judgment of the sound in daily life. For example, the "rattle" sound caused by the dry friction of the bearing, and the "click" sound similar to the small hammer hitting the cement floor caused by the excessive valve clearance.

1. Correctly distinguish between normal and abnormal sounds.

The vibration of each mechanism in the work of the car will emit a variety of sounds, but the sound does not mean that the car is faulty, in order to avoid unnecessary disassembly, we must first distinguish between normal sound and abnormal noise. The normal vibration sound of each system component (such as the noise on the surface of the engine), the impact sound of the gear when shifting, the air intake sound and exhaust sound of using gas as the working source, and the gear meshing noise are all normal sounds. Abnormal noise (abnormal noise) can be divided into slight noise, general noise and malignant noise according to the impact on the performance of the car.

Slight noise, such as the flashover sound of high-voltage electric leakage, the slight loose sound of rolling bearings, etc., the general volume is small, the degree of wear of the parts is not large, and there is no significant change for a long time, and this kind of fault can still maintain the normal operation of the car without repair.

3. When diagnosing abnormal noise, attention should be paid to creating good auscultation conditions and trying to eliminate the interference of other noises, so as not to affect the accuracy of judgment.

It is best to consciously amplify or reduce the sound, that is, use a screw or other metal rod as a stestological instrument to contact the sound part to amplify the sound, or use a single cylinder fire cut-off to reduce the sound to meet the diagnostic needs. The auscultation site should be kept quiet to minimize human interference.

Squeak and squeak are only present at idle or low speeds. 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 and the hollow 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).

Abnormal noise only exists when it is idle or running at low speed. The reasons for the sound are: the gap between the piston and the cylinder group 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).

The sound is disordered when it is maintained at a certain speed, and it makes a brief sound when it decelerates sharply. The reasons for the sound are: the camshaft timing gear is cracked or its fixing nut is loose; The curved and resistant shaft is broken; The piston pin bushing is loose; The axial clearance of the camshaft is too large or its bushing is loose.

Abnormal noises occur when the engine accelerates sharply, and the sound persists when running at high speeds. 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; The crankshaft is broken.

The electrostatic precipitator is a device that collects dust in flue gas by electrostatic purification method. It is an ideal equipment for purifying industrial exhaust gases. Its net profit work mainly relies on the residual circle resistance of the two systems of discharge electrode and precipitation electrode.

When the electrode space of high-voltage direct current is input between the two poles, anions and cations are generated, which act on the surface of the exhaust gas dust particles passing through the electrostatic field, move to the electrodes of opposite polarity under the action of the electric field force, and deposit them on the electrodes to achieve the purpose of dust collection. Both pole systems have rapping devices, when the hammer type periodically knocks the two pole devices upright, the dust adhered to them is shaken off, and falls into the lower ash hopper and discharged out of the ash discharge device through the ash discharge device. The purified exhaust gas is discharged into the atmosphere through the chimney from the outlet, and the cavity of the flue gas purification process is completed at this time.

Summary. If the chassis is ringing in the direction of the outer cage or shock absorption pressure bearing, it is the chassis ball head sound when driving over the bumpy road.

First of all, it is necessary to confirm which part is causing the abnormal noise, whether it is the engine or the chassis. The engine is generally a belt, and the tensioner is aging and digging, and there will be abnormal noise if it is too loose or too tight. Chassis shock absorption, shock absorption top glue, ball joints, etc. will cause abnormal noise.

You can check whether there is a shortage of engine oil and antifreeze, and you can drive to the auto repair shop slowly and check it.

It feels like the chassis is ringing.

If the chassis is ringing in the direction of the outer cage or shock absorption pressure bearing, it is the chassis ball head sound when driving over the bumpy road.

The main reasons for the buzzing sound of a vehicle while driving are as follows:

1. The tire pressure is too high to cause abnormal noise, and the tire pressure should be adjusted within the standard value range when using the car daily (generally, if the tire pressure is too high, the tire crown will be seriously worn, the shock absorption and cushioning performance of the tire will decrease, and the tire noise will increase significantly.)

2. Abnormal tire wear causes abnormal noise, the crown of the tire is in contact with the ground and rubbing, if the crown is unevenly worn, there will be a buzzing sound.

3. The wheel bearing is damaged and abnormal, and the hub bearing will produce a buzzing sound after wearing, the main reason is that the wheel bearing is worn loose due to long-term use, and the wheel bearing can be protected by avoiding violent impact during daily use, and avoiding wading for a long time can play a protective role in the wheel bearing.

Several aspects of car care are as follows:

1. a belt. In the process of starting the car engine or driving the car, it is found that the belt rings, and the reasons are divided into two types: one is that the belt has not been adjusted for a long time, and it can be adjusted in time after being found. Another reason is that the belt is aging and needs to be replaced with a new one.

2. Air filter.

If the air filter is too dirty or blocked, it will directly lead to increased engine fuel consumption and poor operation. Check the air filter regularly every day, if you find that there is less dust and the blockage is not serious, you can use high-pressure air to blow it from the inside to the outside and continue to use it, and the dirty air filter should be replaced in time.

3. Gasoline filter.

If you find that the oil supply is not smooth, you should check whether the gasoline filter is blocked in time, and replace it in time if it is found to be blocked.