Cars are getting louder, what s going on?

There are four "sources" of car noise: engine noise, tire noise, noise in the air, and noise caused by the body structure. For these four different noises**, we also have solutions.

1. Causes of noise.

1.Engine noise.

The engine of the vehicle is one of the most noisy, and its noise generation varies with the engine speed. It is mainly generated and transmitted through the front fenders, hoods, fire barriers, and exhaust pipes.

2.Road noise. Road noise is generated by the noise caused by the wind cutting in and the chassis vibration driven by the driving when the vehicle is driving at high speed, and the sand and gravel on the road will also produce noise when the chassis of the vehicle is impacted, which is the main cause of road noise.

Road noise is mainly generated and transmitted through the four doors, trunk, front fenders, and front wheel arcs.

3.Tire noise. Tire noise is the vehicle at high speed, tire and road friction generated, depending on the road conditions to determine the size of the tire noise, the worse the road conditions, the greater the tire noise, in addition to the asphalt pavement and concrete pavement caused by the tire irritation is very different.

Tire noise is mainly generated and transmitted through the four doors, trunk, front fenders, and front wheel arc.

4.Wind noise. Wind noise refers to the pressure of the oncoming wind in the process of high-speed driving of the car has exceeded the sealing resistance of the door into the car, the faster the driving speed, the greater the wind noise. Wind noise is mainly generated and transmitted through the four door seal gaps, including the monolithic thin steel plate.

5.Resonant noise and others.

When the sound is transmitted into the car, if there is no sound-absorbing and sound-insulating material to absorb and block, the noise will continue to refract and overlap, forming a resonant sound. Noise is mainly generated by noise entering the car, superimposing and reflecting.

Second, the solution.

1. Engine noise, road noise, and tire noise are all structure-borne noise, and its main production is vibration, and the most reasonable solution is to control vibration. Adding a damping plate and a sound-absorbing pad can solve road noise and tire noise well.

2. Wind noise is formed because the pressure of the wind exceeds the sealing resistance of the door, so strengthening the sealing resistance is the most direct and fundamental solution, and the door sealing strip and the inner sealing strip can solve this problem very well.

When it comes to car noise, most people are intolerant. However, as long as you pay more attention to the maintenance of the car, take more care of it when you use it, and solve the problem in time, the probability of these problems will be reduced, thereby increasing the safety of driving.

Hope it helps! Hope!!!

1.Tire noise.

Tire noise is relatively easy to spot and easy to solve, but when it does occur, it is the most troublesome problem because the amount of tire noise varies with the speed of the car and road conditions. Generally, the worse the road conditions, the louder the tire noise. If the road is not wide enough, the noise is really "terrible", so once you find that your car tires are noisy, you should check your car tires well.

Insufficient tire pressure is generally the main reason for the increase in tire noise, because too low tire pressure will lead to an increase in the contact area between the tire and the ground, an increase in the friction area, and noise will follow, and abnormal tire pressure can easily lead to a puncture, so it is very important to check the tire pressure regularly.

2.Wind noise.

Wind is also a noise after the car accelerates, which is produced by the rapid friction of air against the surface of the car. New cars are rarely seen because the seals of new cars are new. If noise is to be transmitted from the outside into the car, it must be transmitted through the cracks of the doors or the steel plates of the shirt.

As long as the sealing strip is intact, it can generally effectively isolate the external noise, and the sound insulation effect will naturally deteriorate after the sealing strip ages and hardens. Replace the sealing strip in time.

3.Engine noise.

Engine noise is the main cause of the increase in vehicle noise and the most urgent problem to be solved. Whenever the engine works, it will make a certain amount of noise, but in order to reduce the noise as much as possible, the designers will add a large amount of soundproof cotton to the engine compartment, which is why the engine noise of the new car is almost inaudible, but the longer the engine is used, the louder the noise. However, it is also normal for the soundproof cotton to deteriorate, and it should indeed be replaced after two or three years.

However, if the engine noise is still very loud after replacing the soundproof cotton or the soundproof cotton has not aged, you should pay attention.

4. Generally speaking, with the increase of mileage, the carbon deposits in the engine compartment will accumulate more and more, and the noise of the work will naturally be much larger than usual, which is caused by the lack of maintenance of the car, and the carbon deposits should be cleaned up at the maintenance station in time, so that the noise of the car will be much smaller.

1. Carbon deposition in the engine, or noise isolation is not in place.

The engine is one of the main sound sources of the car, with the high-speed operation of the engine, the sound will also increase significantly, to carefully identify the noise of the engine**, if it is caused by engine shake, it may be that a large amount of carbon deposits have been deposited inside the engine, resulting in insufficient fuel injector oil, and the fuel injection needs to be increased to provide enough power to the vehicle. At this time, it is necessary to clean the carbon deposits in the oil circuit in time to reduce the noise of the vehicle. It is necessary to develop the maintenance habit of adding fuel additives to the fuel tank regularly, if the car has not been cleaned of carbon deposits, and the carbon deposits have been so serious that the use of additives can not be cleaned, it is necessary to go to the repair shop in time to do deep cleaning.

Secondly, although there will be sound and heat insulation materials between the engine and the cockpit, some engines are old in technology and some engines have a long service life, and there will still be obvious engine noise transmitted to the cockpit.

Second, the aging of the engine mount leads to abnormal noise.

The engine mount is a part that connects the engine to the body of the car, so if there is a problem with this part, then the car will definitely make a sound. This part is mainly composed of metal and rubber materials, and over time, these rubber will definitely age, so it will produce noise.

3. Tire size, size and model These factors will have an impact on tire noise.

Car tires are the part that comes into contact with the road surface the most, and if there are a lot of stones on the road, then the road surface will be more noisy than if it is flatter. In addition, if the tires are very badly aged, then the vibration of the car will definitely not be eliminated in time, and you will feel that there may be very loud noise in the car. Therefore, if you feel that the tire noise is very loud, you can consider replacing the silent tire when replacing the tire.

Fourth, the installation of soundproof materials inside the wheel arches has a miraculous effect.

The sound insulation inside the wheel arches also has a significant impact on the tire noise transmitted to the cabin. Since the inside of the wheel arch is a nearly semi-enclosed space, the noise will only subside after repeated ejection on the wheel arch wall, and if the sound insulation measures inside the wheel arch are not done well, or no sound insulation measures are done at all, the noise will be greatly improved.

Fifth, the door tightness.

If there is obvious wind noise at the door, or the noise level on the left and right sides is significantly different, it is necessary to consider whether the door strip is aging or cracking. Check the tightness of the adhesive strip around the door and repair or replace it in time.

6. Aging and short circuit of electronic components, resulting in noise.

In the car, in addition to the instrument and central control, there are many large and small electronic components and wiring harnesses, and over time, the components are aging or the wiring harness is short-circuited, which may emit some noise.

7. Noise caused by cooling system.

The cooling system on the car is the guarantee that the whole vehicle components provide balance, if there is a problem with the cooling system, the operation of the whole vehicle will have problems, which will inevitably lead to abnormal noise and noise.

Lack of coolant. The main function of the coolant is to dissipate heat through circulating flow, taking away the excess heat energy generated in the engine work, if the coolant is insufficient, it will cause the water temperature to be too high and the noise will become louder.

Aging tires. Tires are made of rubber, which will age and harden over time, resulting in noise, especially in poor road conditions, when the noise reaches the cab like thunder. In addition, the grooves of the pattern will gradually be smoothed out and many small cracks will appear, which is also a reason for the louder noise, and it will also affect driving safety.

Too much carbon deposit. Automobile noise, in addition to the mechanical sound emitted by the engine body, also includes the noise of the air intake system, that is, the aerodynamic noise generated during the flow of high-speed gas into the cylinder through the air filter, air intake pipe, and valve. This is especially true when there is carbon deposits in the engine cylinders, so it is best to clean them up regularly.

Aging of the sealing strip. The sealing strip can fill the gap between the body parts, as well as the role of shock absorption, waterproof, dustproof and sound insulation, but it will harden and age after a long time, so that the sound insulation effect will become worse, and even lead to air leakage and water leakage in the car. If the sealing strip is aging, it is easy to produce noise and abnormal noise, if the problem is serious, you can choose to replace it directly.

The car is loud, probably because of the aging of the foot glue, improper use of engine oil, and lack of cylinders in the engine. Here are some of the reasons why cars are loud:

1. Aging or loosening of the foot glue:

The foot glue is aging and loose, and it will shake when it starts, so the sound will be loud.

2. Improper use of engine oil:

The viscosity of the oil does not match the engine, resulting in carbon deposits that cause the engine to become noisy.

3. The engine lacks cylinders

The engine cylinders are not working properly.

If you do not change the oil in time, it will lead to increased noise in the car engine, and spark plug damage can also lead to increased noise.

The car noise is getting louder and louder, it may be that there is a problem with the car tires, it is recommended to check the tires and replace them in time.

Why are cars getting louder? Just focus on checking these 3 places and you will find the reason.

What's the reason for the car to get louder? The following are the main reasons for the noise of automobiles: 1. Aging of engine mount rubber:

After a long period of use, the rubber bracket will age and become brittle, so that the bracket does not play a role in noise reduction. 2. Automobile tire wear: Automobile tire is the most easily worn part of the car, and the tire and road surface are gradually aging after wear, and the noise and shock absorption effect of the tire on the car will be reduced.

3. Aging of shock absorber parts: After the aging of shock absorbing parts, the shock absorption effect is reduced accordingly, and passengers sitting in the car feel vibration and noise. 4. The viscosity of the engine oil is too low

The high viscosity of the engine oil can maintain the lubrication of engine parts, but after a long period of use, the viscosity of the engine oil will decrease, and its lubrication and wear resistance will become smaller, so as to increase the engine noise. 5. Aging of sealing strips: Whether the exterior of the car has good sealing is very important to the impact of automobile noise, and the sealing strip needs to be checked for the engine sound from the bottom of the car during the inspection of the noise source of the car.

The reasons for the high noise of the car are as follows: 1. Serious wear of the car tires: when the car is bulging, leaking, or seriously worn, it will produce noise due to friction when the car is driving normally.

2. Aging of auto parts: When the car has been used for a long time, the engine, brakes, exhaust pipes, seats, etc. in the car are prone to aging and loosening, resulting in noise. 3. Low oil quality

If the quality of the added oil is too low, it is easy to produce impurities, clog the oil pipeline of the car, and the engine will not be effectively lubricated, resulting in noise. 4. Sound insulation damage: The sound insulation cotton of the car is damaged.

1. The engine overheats and causes the engine to lose power.

If the engine is so active for so long that the surface overheats, the cooling system will strike. The first thing to do at this time is to check the cooling system, if there is a problem with the cooling system, it may lead to a blockage in the exhaust, because there is a high chance that the vacuum tube will break. At this time, steam or hot air will come out of the engine, which will make some "wow" sound.

So as soon as you hear this sound, it is time to check if there is a problem with the cooling unit. Of course, if the sound is made in the place of the exhaust pipe, it proves that there is a problem with the exhaust pipe first, and it is necessary to check the exhaust pipe first.

2. There is a problem inside the engine, such as a blocked valve.

In the process of driving, sometimes we don't see anything wrong with the appearance, but we find that the throttle is not strong when refueling. It could also be a problem with the engine. Because when the throttle is added, the engine speed is actually increased, but the speed is not raised, which indicates that there is a problem with the inside of the engine.

At this time, it is also necessary to look at the cooling system to see if the coolant is normal. Then check the oil pressure gauge to see if it's because of the oil pressure, or if it's an ignition problem. There is also the problem of clogged internal valves and so on.

If there is a loud noise when accelerating or decelerating, then you have to look at the generator shaft, or even the water pump, power steering pump, etc.

3. If there is a sound similar to "spraying" in the engine, it is recommended to change the oil.

There is also a relatively ugly engine sound, the most likely reason may be that the engine is overheated or too cold, and there is also a high probability that the reason is less oil. Other reasons are more complicated, such as the ignition line of the source, or the oil filtration of the oil part, etc. At this time, it is recommended that you focus on checking the air filter, as well as the spark wire and spark plug.

No matter which one is old or unclean, it will cause this unpleasant sound, so it is recommended to renovate these things to see if you can solve the sound problem.

4. The engine makes a sound similar to that of a lap, mostly due to problems with cylinder valves.

If the engine is running with a dull sound similar to a lap, it may be due to a problem with the cylinder valve. In this case, if you drive the car very fast, the sound will disappear in fast running. Therefore, once you drive fast, the sound will disappear, and it is most likely due to the problem of the cylinder valve.

In addition to this, it is necessary to check the problem of oil pressure as an exclusion. There is also a situation where when you step on the accelerator, there is that kind of thumping leak sound. It is possible that there is a leak from the exhaust pipe, in which case gasoline will be consumed a lot, so it is necessary to check the condition of the exhaust pipe at this time.