What is the cause of particularly loud engine noise?

Change the oil. Then check: 1. Whether the EFI is not well coordinated or the lubrication system is poor, 2. Whether there are parts that are badly worn or the muffler of the engine is aging will also cause loud sound 3. Go to the repair shop to check.

Hello, if the engine is noisy, it is considered that it is caused by carbon deposits in the engine or the decline in oil quality, it is recommended that you go to clean up the carbon deposits and replace the new engine oil.

The engine is noisy and you may need to change the oil, or clean the throttle and cylinder volume carbon.

First of all, check the belt, bearing, and also see if it has not been maintained for a long time and needs to be maintained.

Hello, in this case, it is also possible that there is some problem with the added engine oil, it is better to replace it better.

Hello, if the engine noise of the car is particularly loud, it should be caused by too much carbon deposit in the engine.

Hello, the engine is noisy, it may be the quality of the engine itself or the sound insulation is not done well.

If the engine is very noisy, it may be due to the oil being changed, or the model is not the same.

Hello, this engine is noisy, you can clean the engine carbon deposit, try it, and replace the spark plug.

In this case, you can think about how long it took for you to change the oil last time and how long it took this time.

Causes of high engine noise include: oil filter problems, poor rubber ring seals, damaged engine bearings, exhaust pipes, and it is normal for the engine to be louder than usual when starting in the cold in winter. Specifically, there are three main categories of causes of high engine noise:

The first type is combustion noise, which is related to the type of oil. In gasoline engines, abnormal combustion causes combustion noise, while in diesel engines, greater noise is generated due to a sharp rise in air pressure in the combustion chamber. The second category is mechanical noise, which mainly includes piston knocking sound and valve mechanical sound.

There is a gap between the piston and the cylinder liner, and the air pressure acts on the piston to produce a knocking sound. The valve machine sound is mainly caused by gear noise and crankshaft torsional vibration that disrupts the normal meshing of gears. The third category is noise related to changes in ambient temperature.

In winter, it is normal for the engine to be louder than usual when it starts cold, as it takes a longer period of combustion to heat the water in the cooling system to normal operating temperature. Therefore, in the usual daily use, we must always pay attention to the situation of boring rental motive noise, find abnormal conditions and repair in time to ensure the normal operation and safety of the vehicle.

The reasons for the high engine noise are: 1. The foot pad has been damaged and aged for a long time and loses the shock absorption effect; 2. The oil is insufficient or the oil is aging and viscous and cannot be lubricated; 3. The sealing strip is aging and loses the sound insulation effect; 4. Carbon accumulation occurs when the engine is used for too long between the companions. Noise when the engine is started can be caused by a thimble or valve system.

If the engine is still noisy, check your oil pressure. A low pressure reading (or oil warning light) will show a serious internal engine problem and prevent normal oil pressure from reaching the upper manifold Lupei macro. The reason could be that the oil pump is worn or damaged, and the oil pump suction net is clogged or clogged.

Using too thick a lube can slow down the amount of oil delivered to the upper valvetrain in cold weather, leading to noise and wear.

There may be some of the following reasons for high engine noise:

1. There is carbon deposition, because the old engine oil becomes thinner and thinner the more it is used, so there is more and more carbon deposition. The oil is thin and easy to channel the oil, resulting in more and more carbon deposits and a lot of power loss. When the new oil is changed, the engine cannot adapt to the viscosity of the oil, which may pull up the speed, which in turn causes the engine to be noisy;

2. Sound insulation, if you listen to the normal operation of the engine outside, and feel that the noise is too loud when you sit in the car, it means that the sound insulation effect of your vehicle is poor. The vehicle's seals should be inspected to see if there is any signs of aging. Or increase the sealing effect of the vehicle, and then try how noisy it is;

3. Coolant, the role of coolant is well known, when its temperature is too low, it is likely to have problems, and the noise of the engine will become larger, which should be checked and replaced to avoid other problems;

4. Shock absorber, we all know the role of shock absorber, generally when we cross the speed bump, we can feel whether the shock absorber on the car is good or not, when there is a problem with the shock absorber on the car, there will be a problem of engine noise;

5. Deflagration and detonation, when there is detonation, that is, after the spark plug jumps, the end of the combustible mixture spontaneously combusts, at this time, the flame center formed by the spark plug ignition mixture and the new flame center formed by the spontaneous combustion of the end mixture are in opposite directions, and propagate at the speed of impact, resulting in a sharp knocking sound and increasing the engine noise.

Congratulations on the aging or loosening of the machine foot glue.

The foot glue is the rubber rubber orange pie 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 old, messy or loose, the engine will shake, and the higher the speed, the louder the sound.

The reason why the engine is louder

1. Engine oil: If the viscosity of the vehicle's oil is too high, it is easy to cause problems in engine operation, and the lubrication effect will deteriorate, resulting in high engine noise. Therefore, at this time, you should go to the repair shop in time to check whether it is time to change the engine oil, or calculate whether the time for maintenance is up.

2. Belt: Check whether the belt is loose, sometimes the belt is loose, which will cause the engine compartment to become louder.

3. Water temperature: If the engine is noisy, it is also possible that the water temperature is too high, and it is necessary to see whether the water temperature gauge is normal and whether there is smoke in the engine compartment. Be sure to change the coolant before winter.

4. Idling: If you feel that the noise is relatively loud when idling, and the idle speed of the vehicle is high, it is likely that your car's throttle, air intake, and fuel injector should be cleaned, especially the throttle.

5. Sound insulation: If you listen to the normal operation of the engine outside, and feel that the noise is too loud when you sit in the car, it means that the sound insulation effect of your vehicle is very poor. The vehicle's seals should be inspected to see if there is any signs of aging. Or increase the sealing effect of the vehicle, and then try how noisy it is;