The engine suddenly becomes louder? Many times it is our psychological effect. It always feels that the car has spent a short time. If there is something wrong with it, it is always worried that it has not been repaired. After I had a nurse, I felt I had a problem with the car. For example, after changing the oil, it was found that the noise of the engine became louder. To know that different grades of oil have different characteristics, their performance is not the same in the case of low temperature resistance and high temperature resistance, especially when it is started at low temperatures. First, high viscosity grade If the selected oil has a high viscosity level and the oil is more viscous, the motor, battery, etc. will increase the power output at startup, and the sound will increase, but it will return to normal after a period of time. Second, the engine oil is too thin If the selected oil is too dilute, it will be difficult to form a sufficient protective oil film under high temperature work and cause insufficient lubrication, resulting in increased friction in the cylinder. There are errors in people's hearing in different environments. From the technical point of view of oil viscosity, the viscosity of oils with viscosity of 20 and 30 will be slightly larger in city driving, and the noise will be slightly smaller when driving at high speed. The viscosity of the 40,50 oils will be slightly smaller in urban driving, and the noise will be slightly larger on high-speed normal driving. Of course, in order to truly distinguish the size of the noise, you must use a decibel meter to test it. If the newly-changed engine oil causes the vehicle noise to be relatively large, it may be better to drive for a while first. If the noise is reduced after 500 km, it is a normal phenomenon. If the noise is still very high, then it may be that this new engine oil is not suitable for your car, you can choose to replace it when you change the engine oil next time. Of course, when we started the car, we suddenly found that there were many reasons why the voice was loud. There are riders who reflect that their car is stepping on the accelerator pedal. You will hear the sound of squeaking and squeaking. Do you suspect that something is wrong? Hearing sounds should come from the exhaust pipe. If it is not very careful, the owner may not hear it, and the sound is not loud. However, this situation will slowly increase fuel consumption. How to solve? It is recommended to check the silencer and check if there is any damage to the exhaust pipe. What noise will the engine make? Look at what causes it, and whether your vehicle has appeared: One, buzzing sound When the engine is idling, it makes a buzzing sound as if something is making metal. However, when accelerating, the sound disappeared. It may be caused by the cylinder valve. The adjustment valve can be changed. What causes it? Lack of oil, lack of oil may cause similar problems, and the oil pressure is relatively low, you have to check the engine oil pressure. Second, whirring When it is accelerating, the engine will scream, or it will appear when decelerating. In short, the RPM will change and the sound will change. The similar noise generated by this kind of problem is more likely to occur. It may be that the power steering oil is missing, the power steering pump and the water pump are in trouble, and the generator bearing may be damaged. Third, the sound of silk The engine has a buzzing sound, just like steam or air comes out of the engine. After hearing this kind of sound, the engine will quickly lose power. If the engine overheats, check the cooling system. Of course, it may also be that the exhaust system is clogged, the vacuum tube leaks, or it breaks. Fourth, kicking The engine has a kicking sound, like a pencil knocking at a desk, and the increase in sound is accompanied by an increase in engine speed. This means that there is a turbid substance inside the engine. It is advisable to check if oil change, machine filtration, etc. are required. If not, the other may be a valve problem. The sudden increase in the engine's sound will not only occur in these situations, but also in other issues and operations. Although the weather is hot today, but the weather will give you a few heavy rains, in order to avoid serious damage to the engine of the vehicle, and the heavy rain will take care of the serious road sections. If the vehicle shuts off during the overheating process, it must not be restarted. The engine is started again and a sound is emitted again after a few seconds. After that, the engine can not start many times. In this situation, the car has been seriously damaged. Since the water cannot be compressed, the engine is still working at high speed after the water enters the cylinder. When the work is done, the water cannot be compressed and the valve and the connecting rod are bent. The piston gets stuck and the cylinder wears badly. The crankshaft is bent. The lighter condition is that a small amount of water enters the engine. The engine oil containing water will increase the wear of the engine components, and the engine noise and vibration may increase after the vehicle is driven. Rotary Blow Molding Machine,Rotary Bottle Blowing Machine,Rotary Stretch Blowing Molding Machine,Rotary Blowing Machine Demark(changxing)injection system CO. LTD , https://www.petplas.com
These sounds from the engine, is it a problem with their own hearing?