The most common 8 types of car noises, which is the most deadly

1. The low-speed bumpy road section will sound.

Reason: In this case, pay attention to check the storage compartment, the inside of the bootcase, the sunglasses in the glasses case will also ring, and the wiring of the dash cam installed after is not loose. The contents of the storage compartment in the car, the contents of the glove compartment, or the sound of the wires of the rear electronic devices tapping.

Sometimes this sound is refracted back through the ceiling, and you feel like the ceiling is ringing.

This abnormal sound check method: clench your fist, knock in some areas of the car, when the knock to a certain part of the sound appears, determine what is around the whole part nearby, take out or fix it one by one, and confirm it in the knocking, if the sound disappears, it means that the thing you take out or fix is the source of the abnormal sound.

2. If there is abnormal noise regardless of low speed or high speed, and the faster the speed and the faster the frequency, it means that it is related to the transmission mechanism, and the transmission part outside the car should be checked, such as tires, ball cages, etc.

Reason: This sound is accompanied by transmission or vibration, and is not the same as the fragmented clicking sound in the car. It's easy to tell the difference, and you can find out when you go to the repair shop and turn the tires on the shelf.

3. It has nothing to do with the speed of the car, and the sound is irregular, like the sound of banging outside the car.

Reason: In this case, pay attention to the perimeter of the door frame, the loose items in the trunk, or check the chassis of the car. Check whether there are fallen leaves or debris under the front windshield that are blown by the air current, or whether it is the shaking and knocking sound of loose objects under the car body or the trunk (such as water bottles or debris shaking in the trunk); Or there are plastic bags or other debris hanging under the car.

4. The squeaky sound in the engine is regular with the speed, or the frequency is uniform when idling.

Reason: This is necessary to go to the repair shop to check, or use a stethoscope for detection, generally related to the standby pulley.

5. When crossing the deceleration barrier, the wheels "clang".

Reason: Most of it is because of the loose ball joint of the top rubber or steering tie rod. Volkswagen has some models of top rubber (also called plane bearing) when there is a problem, there will be abnormal sound when the steering is played, a bit like the sound of tire rubber grinding the ground, after the vehicle is lifted off, the steering tires, the bearing will emit a regular "bar" sound.

This is basically the sound of the balls inside the bearing.

6. When turning, there is a loud sound from the front of the car.

Reason: Generally, there is a problem with the cage, go to the repair shop as soon as possible to check. This abnormal sound is accompanied by the friction sound of "Zengzeng" coming from the front wheels when accelerating, with a frequency proportional to the speed.

8. After stopping and turning off the engine, there is a regular rattling sound from the engine compartment, sometimes there is a hissing sound, but it is very regular.

Reason: This sound is still mainly focused on turbocharged models, which may be the sound of a pressure relief valve, or the sound of a computer working on a vehicle parking self-test.

There will be a variety of unforeseen problems in the car, the above-mentioned car abnormal noise is only the owner in the car is more common abnormal noise, in the investigation of abnormal noise requires professional technicians rich experience, so the car abnormal noise should not be careless and timely maintenance.

Abnormal sounds are produced during the operation of the engine, which is called abnormal noise. Abnormal sound is a phenomenon that occurs the sound of metal collision due to vibration and mutual impact of moving parts, which reflects the deterioration of the working condition of the machine parts, and there is a fault. The main causes of abnormal noise are as follows.

The moving parts are too large due to natural wear, such as the piston and the cylinder wear and the matching gap increases, and the piston knocks on the cylinder. The moving parts are made to increase the fitting clearance quickly and exceed the allowable limit due to poor lubrication and aggravated wear, and make abnormal noise; Or due to poor lubrication, burn damage to make abnormal noises, such as crankshaft bearings and connecting rod bearings. Due to the sudden explosion and premature ignition, the engine has a metal knocking sound, commonly known as "fire head ring".

The loosening of the connecting bolts of some moving parts causes the impact sound, such as the loosening of flywheel bolts, the loosening of connecting rod bolts, etc. Abnormal noise caused by damage to individual parts, such as broken piston rings, broken valve springs, broken camshaft timing gears, etc. Improper repair or adjustment will cause the fitting gap of the parts to be out of balance and produce abnormal noise.

The piston and the piston pin fit loosely, the piston and the cylinder fit gap is large, and the connecting rod bearing and the journal are assembled too tightly, which will produce abnormal noise due to the uncoordinated movement of the three. When the valve seat insert is pressed, due to the improper selection of the material or the interference between the bearing holes of the valve seat insert, the seat seat is loose during operation and the sound is generated. When the fully floating piston pin is loaded into the pin seat, the piston skirt is deformed due to the over-tight fit and produces abnormal noise.

Poor adjustment quality of the mechanism causes noise, such as too large valve gap, too early ignition time, etc.

If the car has an abnormal noise when idling, and the abnormal noise disappears after pressing the clutch, it means that the abnormal noise** is caused by the failure of the gearbox. Abnormal noises in the gearbox are generally caused by wear of bearings or gears.

1.Abnormal brake noise.

2.Abnormal body noise.

3.There is an abnormal sound in the gearbox.

4.There is an abnormal sound in the suspension.

5.The steering wheel rattled.

6.Abnormal noise in the engine compartment.

7.Abnormal tire noise.

The car has abnormal noise, which is a problem that many cars may have after driving for a period of time, but as a person who does not understand the car, it is a very uncomfortable thing, some people can tolerate this sound, some people are irritable, and some abnormal noise is a sign of potential safety hazards in the vehicle, if it is not dealt with in time, it may cause a traffic accident, but I don't know anything and send it directly to the 4S shop for repair, **I don't know if there is a problem, The inspection and repair of the whole car also costs a lot of money.

Today, the car repair girl will introduce to you some common situations about abnormal noise in the car, are you still worried about not finding the problem? After reading this, you will understand, everything you can go to is here!

1. Abnormal noise on bumpy road sections. At this time, consider whether there are some small parts in the car, such as what is put in the storage compartment or trunk, after discharging the human cause, it is necessary to check the vehicle one by one, the most effective is to hear the abnormal sound that occurs, stop at that part to knock, if there is an abnormal noise, you can determine the things around the part, take it out and fix it.

2. In any road section, the faster the speed, the greater the abnormal noise. At this time, it is necessary to consider the rotating parts, such as the external wheels, chassis bearings, etc. This situation is basically impossible to solve by yourself, and you need to go to the car repair shop to check carefully, usually there is a problem with the transmission part.

3. The engine is a turbocharged car, and there is a regular abnormal noise when accelerating. Don't worry about this situation, this is a unique sound of turbocharged engines, and many manufacturers will also increase this sound in order to let the occupants of the car feel the experience brought by the strong power.

4. There is an abnormal noise outside the window. Some car windows that have been open for a long time will make some noises, which is related to the tightness of the door, at this time, just go to the repair shop and ask the maintenance personnel to install the door tightly, and apply lubricating oil on the rotating part.

5. The engine has abnormal noise when idling. At this time, the priority should be the conveyor belt, many car owners do not need to change a belt, in fact, under normal circumstances, the service life of the belt is more than 5 years, if it has not been replaced for a long time, then this abnormal noise is likely to be caused by the aging of the belt.

6. The car makes a "squeak" sound when turning, and the louder the curvature, the sharper the sound. This abnormal sound is most likely to be a problem with the cage, generally the oil is dry, if the owner does not repair it will continue to drive will aggravate the wear, just found to repair it usually only need to clean the balls.

7. When passing the speed bump, the "frame" sounds, which can basically be concluded that there is a problem with the bearing of the car, and the common sound is the ball inside the bearing, which can not be ignored, and in serious cases, the vehicle will tilt, and it is very easy to be in danger of life in the case of high speed.

Abnormal brake noise: The brake pads may be stained with fine particles and foreign bodies, resulting in abnormal noise during braking, and the gap between the brake caliper and the brake pads is too large and too small, which is also easy to cause brake system noise.

Abnormal engine noise: It may be that the oil is poor, or the long-term low-speed operation leads to carbon deposits on the throttle, which will cause the valve sound, the throttle should be cleaned in time, and it is also necessary to adjust the valve clearance.

Abnormal wheel noise: Abnormal wheel noise is likely to be caused by untimely maintenance of the vehicle, or often driving on bad roads, resulting in uneven wear of tires, and serious wear of tire bearings.

Abnormal sound of the steering column: There is a protective nylon sleeve on the limit screw of the steering system, and the nylon sleeve will be worn out for a long time, and the parts will squeak when they are directly rubbed. The abnormal sound of the steering column may also be related to the air temperature, and the friction between the plastic parts caused by thermal expansion and cold contraction may produce abnormal noise.

1. There is an abnormal sound in the body.

Symptom description: When driving on the accelerator or brake, there is always some abnormal noise in a certain part of the body, the sound is not loud, and it does not affect normal driving, but it always makes people worry a little about the failure of the body.

Solution: First of all, check whether there are objects in the trunk or rear seat of the car that are not fixed, easy to roll and make sound, and exclude some items that are not fixed and make noise.

If you find that the friction of the door and window parts of the car causes abnormal noise, you can put rubber strips on the doors and windows or pad rubber on the friction parts, etc., which may be able to reduce or eliminate the abnormal noise, but the result is only a symptom and not a cure. If none of the above problems are found, then you must go to a regular repair shop for maintenance and troubleshooting.

2. The engine has abnormal noise.

Symptom description: There is a lot of abnormal noise in the engine compartment, and most people also judge it to be the abnormal noise of the engine compartment by the sound**, which is usually a metal screeching sound or a howling sound.

Solution: The abnormal engine noise indicates that the technical status of a certain mechanism of the engine has changed. It is mainly caused by excessive wear and tear of some parts or improper assembly and adjustment.

Some abnormal noises can still predict that the engine will be damaged accidentally, so when the engine has abnormal noise, it should be repaired in time to prevent the fault from expanding.

Abnormal noise**1: storage compartment. I believe that most car owners do not have the habit of tidying up the storage compartment, the car has not been sorted out for several years The storage compartment must be full of messy items, so that no matter where the car is driving, as long as the engine opens the storage compartment The items in the compartment will follow the engine "beating", and the abnormal noise you hear is likely to be the vibration of the storage compartment.

In fact, it is very simple, everyone only needs to observe that when the speed increases, the louder the sound, it proves that the car transmission system is faulty. The most effective solution is to see if the car tires have collapsed, if there is, it is recommended that you go to a regular car 4S shop for maintenance.

Abnormal noise to the group posture auspicious source three: abnormal noise outside the car. If the abnormal noise heard is from outside the car, we should first look at whether the doors and windows of the car are normal, and at the same time see if there are things in the trunk.

In addition, you should also check whether there is any debris around the wiper, and clean it up in time if there is one, so as not to affect the normal use of the wiper.

You must know that the service life of car pulleys is about eight years, and if you have not replaced the car pulleys for more than eight years, it will make a "cough" sound in the cold winter. If you want to change the pulley, it is recommended that you go to a regular car 4S shop to replace it, and do not do it yourself, otherwise improper operation will cause damage to 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 lifting 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 you want to judge that the belt is a good way is to drip oil on the belt, if it is the motor belt in the code 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.