How to deal with excessive engine noise?

If the engine noise is too loud, check whether the oil drain valve is blocked and whether the plunger can move freely; Improper calibration of the air-fuel ratio controller; Improper calibration of the fuel pump; The solenoid valve and the return valve cannot be opened; damage to the shock absorber and flywheel dynamic balance; Valve leakage or improper adjustment; The clearance of the gear drive system is unqualified, and the teeth are broken; The valve injection timing is wrong; Cylinder or piston wear or abrasion; Breakage or deformation of the actuator or cam follower cover; The rail pressure switch is turned off; The electromagnetic plunger is stuck in the conductor position.

In this case, it is recommended to clean the engine frequently. Do the sound insulation treatment of the whole car.

You can choose to change the better engine oil, you can also install the sound insulation cotton of the engine, and then do the silence of the whole car, which is good.

To find the cause of excessive engine noise, you can change the better engine oil, and then try to make a whole car sound insulation.

If the engine noise is high, you can change the quiet oil, or you can do the sound insulation treatment of the whole car.

In this case, you can change the engine oil to see if it can solve this situation, if the sound is still loud, make a sound insulation.

Hello, if the engine is too noisy, it is better to change the engine oil. If you are a new car, it is best to install sound insulation.

Hello, this noise, first of all, you need to check whether the oil volume is enough, whether the oil pressure is normal, this needs to be clarified.

You can make the whole car sound insulation, or change the oil for the car, which is also effective.

Hello, the engine is noisy, you can change the oil better, clean up the inside of the engine, if it is the noise caused by the small power of the engine itself, you can install the engine cover sound insulation cotton!

There is no good way. Add more soundproof cotton to the firewall and hood. I think it would be okay if the engine was fault-free, and it would be louder. You may not hear the roar of the engine for another twenty years.

If the engine noise is too loud, you can change the oil a little better, and the viscosity is a little higher. Or do the whole vehicle sound insulation.

If the engine is too noisy, you may want to consider a sound insulation system, or you can change to a better oil.

If it is a new car, it is the engine quality is not good, go to the warranty; If it's an old car, it's the valve rocker.

Connecting rod piston. Piston ring crankshaft.

Cylinder liners or gearboxes, caused by excessive wear, need to go to the relevant repair shop for maintenance.

There are generally the following treatment methods for engine noise:

1. The rubber of the machine foot is aging or loose. The foot glue is the rubber block between the engine and the frame. Its function is to reduce the vibration and cushioning of the engine when working, and to have the effect of fixing the engine.

Once these feet are aged or loosened, the engine will shake, and the faster the speed, the louder the shaking will be. Solution: Tighten or replace the rubber on the feet.

2. Improper use of engine oil. If the oil viscosity does not match the engine, carbon deposits are easily generated, resulting in louder engine noise. On the other hand, if the viscosity of the oil is too low, it will cause insufficient lubrication and wear of engine parts to produce abnormal noise; If the oil is too viscous, the engine will be overloaded and will also produce noise.

Solution: Use the oil label on the car manual, do not mix different brands of oil.

First, the effect of firewall sound insulation and engine compartment cover sound insulation is more obvious, but the project is huge, and the man-hour cost is more expensive, so you must be psychologically prepared. Second, only do the engine compartment cover sound insulation, which has an effect, but it is not as obvious as the first item! 3. Check the engine and make sure the engine is normal.

If the engine is normal, change the oil, and the sound of the engine will be much more pleasant!! Fourth, noise first.

The solutions to the noisy car engine are as follows:

1. The high noise of the engine is related to the oil that is not suitable or too dirty, change the oil;

2. Check whether the bearings of generators, compressors, idlers and tensioners are damaged, and the bearings will make buzzing noise after damage;

3. It can be used as a cover, and the firewall can be treated with soundproof cotton. An engine is a machine that can convert other forms of energy into mechanical energy, such as internal combustion engines (gasoline engines, etc.), external combustion engines (Stirling engines, steam engines, etc.), electric motors, etc. For example, the internal combustion engine usually converts chemical energy into mechanical energy;

4. The engine is not only applicable to the power generating device, but also refers to the whole machine including the power unit (such as: gasoline engine, aero engine). The engine was first born in the United Kingdom, so the concept of engine also comes from English, and its original meaning refers to that"A mechanism that generates power"。

The causes and solutions of high engine noise are as follows:

1. Poor oil quality, if you use poor quality fuel, the combustion situation in the engine will become worse, so that the engine will vibrate violently and make noise. Solution: In this case, the engine noise can be reduced by replacing the fuel with better quality;

2. The engine is fixed and loose, you should know that the engine is not simply placed in the engine compartment, but supported and fixed by claw pads and other components, if those parts are aging and loose, it will cause the engine to produce noise when working. Solution: In this case, it is necessary to check the engine support and fixed parts, and generally tighten or adjust it;

3. The engine is noisy during cold start, and when the car is parked for a long time and starts, the engine will vibrate violently, and then make a "da-da" noise. This is because after the car is parked for a long time, the lubricating oil basically flows to the oil pan, and the oil pump can not immediately establish the oil pressure when the cold car starts, especially the valve inside the cylinder head, which cannot be lubricated enough when the cold car starts, and the hydraulic tappet and the mechanical rocker arm fail to work normally to cause the sound;

Almost every car that has been driven for a long time will increase the engine noise and vibration. This will also occur even if you maintain it diligently and replace various fluids in strict accordance with the requirements of the manual. Of course, this phenomenon is easy to explain, the engine will age, and with the aging will definitely bring such and such problems.

But does this kind of problem have to be completely unsolvable? What is the problem of high noise and high vibration? Actually, maybe it's not complicated.

Most of the shakes are the pans of the machine foot glue.

Although it is true that the engine body will wear out a little with the increase of years of use, and the accuracy of various fits inside the engine will be reduced, this is far from the level that will cause significant vibration. The engine vibration is intensified, and in most cases it is a problem with the foot glue.

The so-called foot glue is called engine shock absorber seat. In fact, it is a few rubber blocks that are padded between the engine and the metal frame. Because the engine is running at high temperature for a long time, and rubber itself is very sensitive to high temperature, so the aging of the foot rubber is inevitable.

The solution is very simple, just replace the foot glue. But this kind of operation needs to lift the engine, not you can do it alone, you must go to the maintenance shop to do it, and because you have to lift the engine, the labor cost of changing the foot rubber will be higher than the general engine maintenance.

.Reduce the stage load of the compressor, increase the axial clearance between the rotor and the stator, change the number of blades, cancel the inlet guide vanes, and select.

2.Reduce the exhaust velocity to reduce jet noise, as in turbofans.

Buy a soundproof cover and cover the engine.

The solution to the loud sound of the car engine is as follows:

1. Tighten the foot glue.

2. Use the oil label on the car manual, and do not mix different brands of oil.

3. Check the working condition of each ignition coil and cylinder spark plug.

4. Install engine soundproof cotton to reduce noise.

5. Tighten or lubricate the gear belt, and replace the damaged gear.

6. Go to the 4S shop to prescribe the right medicine and carry out the engine cleaning project to remove carbon deposits.

The motivation is a noise **, and its noise generation varies with the engine speed. Solution: Some high-grade sound-absorbing foam materials can be added to the engine cover, which can not only suppress the vibration caused by the hood, but also absorb a lot of noise, and the effect is obvious.

2. When there is a leak in the intake and exhaust pipe, when the engine is started, the gas will leak from the leakage when the intake and exhaust are intake, resulting in vibration and noise. Solution: In the face of such a situation, you need to check the intake and exhaust pipes, and replace the intake and exhaust pipes to avoid noise.

3. Tire noise is generated by the friction between the tire and the road surface when the vehicle is driving at high speed, depending on the road conditions to determine the size of the tire noise, the worse the road conditions, the greater the tire noise, and the tire irritability generated by the asphalt road and the concrete road surface is very different. Solution: Tire noise is structure-borne noise, and its main source 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. Noise = engine distress? In fact, engine noise becomes louder and louder throughout the vehicle's lifecycle.

However, some engine noises are a precursor to a malfunction and a dying call for help. There is a "clang" sound in the engine The engine has a "clang" sound, and the owners have to enter the site for maintenance immediately, because the engine has a knocking situation. The engine noise is high, which may be caused by our driving habits, often driving at low speed and high speed, which is prone to insufficient combustion and carbon deposits, resulting in louder engine noise

So we have to correct our driving habits... 3/7.Frequent low-speed driving, long-term in the urban area car engine noise treatment:

1. The foot glue is aging or loosening, the foot rubber is the rubber block between the engine and the frame, its function is to reduce the vibration and buffer of the engine when working, and to fix the effect of the engine, once these foot glue is aged or loose, the engine will shake, the faster the speed of the shaking sound will be. The inner road stops and goes, and the engine is not fully released, and it is also easy to produce carbon deposits...

There are several ways to solve the problem of engine noise:

1.Drive on the highway for a while while it is safe to do so. Often driving at low speeds, stopping and stopping on urban roads for a long time, the engine is not fully released, and it is easy to produce carbon deposits, resulting in high noise.

So, if you often drive in the city, you should find time to go out and run the highway.

2.Maintenance of the engine. When refueling, you can add some fuel treasures, which can effectively remove carbon deposits. After all, the oil quality of our country still needs to be improved, so it is necessary to carry out proper maintenance of the engine.

3.Change the oil. It is necessary to maintain your car regularly and on time.

Even if the mileage is not reached, the old engine oil should be drained, because the oil will be oxygen-widening. After a long time, its various indicators will decline, and the engine will not be properly protected, resulting in noise. So change the oil in time.

4.Clean the throttle. If the car is driven for a long time, the throttle will hide dirt and dirt. So the noise of the engine is really too high, probably because the throttle is dirty. It will be much better after going to a professional repair shop for cleaning.

5.Soundproofing. Noise can also be caused by the deterioration of our car's sound insulation. Due to the aging of noise insulation protection, sounds that were previously inaudible can be introduced into the car. So doing sound insulation can also reduce noise.

6.Inspect the bearings of generators, compressors, idlers and tensioners for damage. When the bearing is damaged, it will make a humming noise;