What s the deal with the noisy engine? 85958

Look at the bottom guard of the engine for bump marks.

First: the engine is used in the factory is the initial oil, referred to as the initial oil, that is, the first barrel of oil used after the engine is born in the factory, and the initial oil generally contains abrasives, because the engine will have gaps in each part when it is just produced, and the abrasives can help the engine to assist the running-in of various parts during the running-in period, so as to achieve the purpose of close cooperation within the engine. At this time, we will not replace the initial engine oil again after the first warranty, and will use ordinary engine oil, the engine oil is different, and the formula ingredients in the engine oil are not the same, which will lead to changes in the sound and even timbre of the engine.

Second: Using the wrong grade of oil. Each engine has its own characteristics, so the oil used is also different, and the oil label required is also different, and when the oil used is not suitable for the engine, various problems can occur, such as louder noise.

How do we solve this problem? Read your vehicle's manual to see if the oil label recommended by the manufacturer is the same as the one used during the initial warranty. Secondly, if there is no problem with the oil labeling, the problem may appear in the engine oil itself, for example, inferior mineral oil will make the engine work more noisy, so under the conditions of economic permitting, the use of semi-synthetic or fully synthetic engine oil is conducive to the operation of the engine and reduces the generation of engine noise.

Here is a suggestion for you, try to use good engine oil, which can make the engine work better, prolong the service life of the engine, and make you feel more at ease when using the car.

In general, combustion noise dominates in the engine at low rpm and mechanical noise predominates at high rpm. The two are closely related and mutually influential. Practice has shown that reducing vibration is a fundamental measure to reduce noise.

In order to prevent engine noise from entering the cab and minimize the noise source, you can go to the 4S repair shop to repair the sealing structure of the cabin, especially the sealing performance of the avant-garde version and the floor.

The engine lower guard screws are loose. One of the more common minor failures is tightening or adjusting the engine underguard screws.

It may be that the engine is aging or other components are wearing out, or it may be that the engine oil used is not good.

Loose plastic parts in the engine compartment. For example, the engine cover, air intake pipe, etc., can be tightened.

It could be that there is a problem with the top cover and oil pipes of the engine.

It is mainly related to the use of engine oil, which may be of different types or inferior quality.

The main reason is the use of inferior engine oil or the wrong model.

It may be that the internal parts are too badly worn.

It could be the cover plate inside the engine, and the kinetic energy device.

Excessive wear and tear of the engine's internal parts.

Hello answer, I have seen your question and am sorting out the answer, please wait a while Hello, I have seen your question and am sorting out the answer, please wait a while Processing: Check whether the bolt is loose. Replace damaged shock absorbers or flywheels.

The causes of engine noise are probably as follows:

First, the combustion noise is the type of oil, if it is a gasoline engine, when the gasoline is deflagrated and the surface ignition and other abnormal combustion, it will produce a large combustion noise. In the case of a diesel engine, the noise caused by the vibration of various parts of the engine due to the sharp rise in air pressure in the combustion chamber. So, generally speaking, diesel engine noise is higher than gasoline engine noise.

There are many types of oil, and there are also different ones, which also makes some sense.

The second is mechanical noise, which is the noise generated by mechanical movement when the engine is running. There are mainly piston knocking noise and valve mechanical noise. If there is a gap between the piston and the cylinder liner when the engine is running, and the gas pressure acting on the piston will cause the piston to strike strongly on the cylinder wall, the piston will produce a piston knocking noise.

The mechanical noise of the valve is mainly the noise of the transmission gear, which is generated by the collision and friction between the teeth before the gear meshing process and the torsional vibration of the crankshaft will destroy the normal meshing of the gear and excite the noise.

The third is aerodynamic noise. It is the noise caused by gas disturbance and the interaction between gas and other objects is called aerodynamic noise, which mainly includes intake noise, exhaust noise and fan noise.

The engine noise is too loud, and it should be that there is no oil lubrication in the transmission part, so it produces a lot of noise. +1 point of oil, the lubrication effect will be better.

It should be that there are impurities in the engine oil.

Reasons for the high engine noise: 1. The oil is uncomfortable. Engine oil is an important component of engine lubrication, and a problem with engine oil will affect the working condition of the engine.

If the viscosity of the oil is too high, the engine is prone to problems, the lubrication effect becomes poor, and the engine runs with friction and noise. In the face of this situation, you only need to change the oil; 2. The belt is not tight enough. If the engine strap is not loose enough, the engine will make a squeaky noise during operation, which will seriously affect the driver's driving experience.

In the face of this situation, adjusting the loosening of the engine belt can avoid noise; 3. There is a leak in the grinding trachea. When a leak occurs in the intake and exhaust pipes, after starting the engine, the gas leaks from the leakage and vibrates during the intake and exhaust air, resulting in noise. In the face of this situation, check the first clean air intake pipe and replace the air intake pipe to avoid noise.

The normal noise of the engine is due to the following reasons: 1. It is normal for the oil filter to be damaged, the rubber ring is poorly sealed, the engine bearing is damaged, the exhaust pipe is the reason, and the engine starts coldly in winter, and the sound is relatively normal; 2. The problem of oil balance in the filter book, the rubber ring is not well sealed, the oil pump cannot pump oil normally when working, a large amount of air is inhaled, and the lubrication of the engine system is insufficient, especially the hydraulic cover part of the valve, there is a metal slapping sound; 3. The oil filter is blocked, resulting in the oil being unable to suck into the engine lubrication system normally, resulting in poor lubrication.

First, there is a problem with the engine mat.

The engine will vibrate when it runs, and in order to reduce the vibration caused by the engine, the car company has installed a rubber ring at the connection between the engine and the frame, so that there can be a buffer. After a long period of use, the foot pad will be damaged and aged, and lose the effect of shock absorption. As a result, vibrations are transmitted directly to the frame, resulting in louder noise.

2. Insufficient or deteriorated engine oil.

When the engine is running, the internal parts wear out. Engine oil is specifically designed to lubricate parts and reduce friction between parts. If the oil is insufficient or the oil is old and viscous, then the oil will not be able to lubricate.

Noise occurs when the friction between parts increases and the airtightness decreases.

3. Aging of sealing strips.

A car is made up of many parts. There is padding between the parts, so that it can be waterproof and soundproof. If you find that the sound of the engine has become louder, it may be that the sealing strip has aged and lost the effect of sound insulation, but the sound of the engine has not actually become louder, but the car is no longer soundproof.

Fourth, engine carbon deposits.

If the engine is used for too long, carbon deposits cannot be avoided. If the owner usually does not pay attention to cleaning up the carbon deposits, and wait until the carbon deposits accumulate to a certain extent, it will affect the normal operation of the engine. Gasoline combustion is not sufficient, and there is a possibility of detonation and shaking, which can also cause the engine to become louder.

The normal noise of the engine is caused by the following reasons: 1. The problem of the filter collector, the poor sealing of the rubber ring, the damage of the noisy orange motive bearing, the reason for the exhaust pipe, the engine is louder than usual when the engine starts coldly in winter, which is a normal phenomenon; 2. The problem of the filter collector, the rubber ring is not well sealed, the oil pump cannot suck up the oil normally and suck a lot of air when it is working, and the engine system is lubricated insufficiently, especially the valve hydraulic rod part, which emits a metal knocking sound to lift the beam; 3. The filter collector is blocked, and the oil cannot be sucked into the engine lubrication system normally, and the slag guide causes poor lubrication.