Why does the engine emit blue smoke? Why does the engine emit blue smoke

The reason why the engine burns oil and how to install the piston ring.

Hello, it is mainly caused by burning engine oil, I hope it can help you d

The reasons for the blue smoke from the engine are as follows:

1.To eliminate whether there is organic oil in the exhaust pipe, if the valve oil seal leaks, it will leak the oil to the exhaust pipe, and then the high temperature will also produce blue smoke.

2.Excluding the above reasons, most of the blue smoke is due to the large gap between the piston and Chi Jingli's cylinder, and the piston ring cannot scrape the oil, and the blue smoke will be emitted.

3.The sudden death of the piston ring also produces blue smoke, because the piston ring acts as an expansion inside. After the overhaul, the engine must be run-in according to the specification. Remember to slam on the gas.

Blue smoke is a condition of burning engine oil, and the main reasons for burning engine oil are as follows:

1. Use engine oil with poor quality or viscosity grade that does not meet the requirements. In addition, too low or too high oil viscosity can lead to poor engine lubrication, increased wear of piston rings and cylinder walls, and reduced sealing performance, resulting in oil burning.

2. The matching gap between the piston ring and the cylinder wall is too large, the piston ring is improperly installed or the sealing is poor, and the oil on the cylinder wall enters the combustion chamber, causing the phenomenon of burning the engine oil; In addition, poor sealing performance of the valve seal, damage to the crankcase forced draft valve (PCV) or crankcase vent blockage can cause excessive pressure in the crankcase to cause the oil to enter the cylinder with the crankcase gas and participate in combustion.

3. Burning engine oil caused by excessive oil filling. When the oil is filled above the center line, the part of the engine lubrication process that passes through splash lubrication will be too much into the combustion chamber due to the high oil pressure.

4. Oil leakage from turbocharger. The turbocharger is installed at the front of the exhaust pipe, the operating temperature is very high, and the turbine and pump wheels can reach 1-20,000 revolutions per minute when the engine is running at full load. The turbine shaft has oil-lubricated floating bearings, and the car has one oil passage to the turbocharger.

Oil leaks from pipes or bearings can allow oil to seep from the turbocharger into the exhaust pipe. When the exhaust pipe temperature is high, the oil is baked and discharged into blue smoke.

5. There is leakage in the valve oil seal, which means that the oil leaks into the combustion chamber through the valve oil seal.

The blue smoke from the engine is generally burned oil. However, the specifics still have to be checked and analyzed.

Burning engine oil means that the engine oil enters the combustion chamber of the engine through a certain way and participates in combustion together with the mixture. This is mainly due to a cylinder leak caused by damage to the piston rings, and oil escapes into the combustion chamber. It is recommended to carry out maintenance as soon as possible, if this is the case in the long run, not only the oil consumption will be large, but also the impurities generated by the combustion of the engine will cause the increase of carbon deposits in the combustion chamber, which will affect the engine performance.

There are generally two common situations:

1.Scratches on the inner wall of the cylinder, poor piston sealing, or severe wear of the valve will produce gaps, and the oil that was originally responsible for lubrication will enter the combustion chamber through these gaps to participate in combustion, and the oil that cannot be burned will produce blue smoke when it is discharged out of the car.

2.In addition, excessive oil filling will also easily lead to oil burning, excess oil will be brought into the cylinder for combustion, resulting in oil burning, and excessive oil will also hinder the normal operation of the crankshaft arm, allowing it to do additional work and increase energy consumption.

It is recommended that it is best to find a professional place to repair the engine and check the engine.

Buy a car, use a car, maintain a car, repair a car, and listen to Chen Gong talk about cars.

1. In general, there may be two situations when the car engine still has white smoke in the hot state: the fuel injection advance angle is small and the combustion is incomplete; Slight leakage of the cylinder liner and water in the fuel; The white smoke emitted from cold start, especially when the engine is started at low temperature, but it is normal for the white smoke to disappear as the engine temperature rises.

2. There are the following situations when the automobile engine emits black smoke: the air-fuel ratio is out of balance; Cylinder pressure drops; Injection too early (injection advance angle too large) will cause black smoke; The smoke limiter on the fuel injection pump fails, and black smoke also emits when the engine accelerates sharply; The exhaust braking system is not working properly. If there is heavy black smoke, there are other aspects to consider.

3. The blue smoke of automobile engine is often caused by "burning engine oil", at this time, it should be checked whether the engine cylinder liner is worn, whether it is "sticky ring", ring counterpart, valve seal ring aging and deformation, valve guide gap is too large, etc., and at this time, it is also accompanied by the phenomenon of crankcase blow-by. Serious oil discharge of the supercharger will also cause part of the oil to enter the cylinder from the intake duct and "exhaust blue smoke", so the oil discharge of the supercharger should be checked in daily maintenance, and the oil in the connecting pipeline from the supercharger to the intercooler should be cleaned in time.

Hello, I am your car master exclusive elite technician, I wish you a happy life and a prosperous Year of the Tiger. We promise to be attentive, careful and attentive to answer your car problems, and find solutions and solutions to the corresponding problems for you! Hello, the exhaust pipe of this gasoline engine emits blue smoke, this is caused by burning engine oil, then the general gasoline engine burns engine oil, the piston ring gap is too much, the valve oil seal is not tightly sealed, then after the oil is burned, it is necessary to overhaul the engine assembly, and then the cost of overhauling the engine is generally about 5000 6000.

The engine emits blue smoke because it burns engine oil, and turbocharged engines are generally easy to burn engine oil, especially German cars, such as Volkswagen and its Audi, etc., self-priming engines generally do not burn engine oil.

Hello, the car emits blue smoke, and many car owners may know that this is caused by the engine oil jumping into the inside of the engine, which is commonly known as "burning engine oil".

1.If the back pressure of the oil return oil of the lubricating oil circuit of the supercharger is too high, check whether the supercharger is leaking oil, including the supercharger itself and the oil return line of the supercharger. As.

2.Poor piston ring sealing, check the cylinder liner, piston and piston ring.

3.The viscosity of the oil was chosen incorrectly, which manifested itself in the morning start-up.

Generally, blue smoke is emitted, and it is judged to be burning engine oil

Buy a car, use a car, maintain a car, repair a car, and listen to Chen Gong talk about cars.

The blue smoke from the engine is basically burning the engine oil, and there are many reasons for this, roughly the following situations:

1. If the back pressure of the oil return oil circuit of the supercharger is too high, check whether the supercharger is leaking and whether the oil return pipe is blocked.

2. The exhaust gas valve is damaged, and the oil and gas cannot be separated, and it re-enters the combustion chamber for combustion.

3. The valve oil seal is aged, damaged or damaged, and the gap between the valve and the guide is too large.

Fourth, the oil exceeds the upper limit, so that the crankshaft throws the oil into the combustion chamber to participate in the combustion during high-speed operation.

5. The engine is seriously worn, and the gap between the piston and the cylinder wall is too large, and the oil enters the combustion chamber from the gap dust.

Sixth, the piston ring is stuck, and the cylinder wall oil participates in the combustion. This is the reason why most cars burn engine oil.

The solution to burning engine oil.

In the habitual thinking of car enthusiasts, they always think that the piston ring stuck engine oil should be overhauled, so that it will not only bear high maintenance costs, but also bear the unpredictable risks and depreciation losses brought about by the overhaul. Destroy the airtightness and precision of the engine. And there is a possibility that the engine oil will burn again after tens of thousands of kilometers, so overhauling the engine is not sustainable.

Now the no-dismantling technology has been very mature and gradually accepted by the majority of car owners. In particular, the non-destructive repair products containing PNF patented technology have completely gotten rid of the technical shackles of burning engine oil and having to go to the auto repair shop for overhaul, without removing a screw, repairing and releasing the piston ring stuck engine oil while driving, with remarkable results.

There are many cases of blue smoke emitted by engines, and there are many reasons that affect blue smoke emissions, which are basically different. The following types of friends need to be explicit.

1.The back pressure of the oil return in the lubricating oil circuit of the supercharger is too high. Check the supercharger for oil leaks, including the supercharger itself and the return line of the supercharger oil.

If the oil return pipe of the turbocharger is blocked, resulting in poor oil lubrication and poor oil return, the oil will enter the intake pipe and enter the combustion chamber to burn and emit blue smoke, and if the turbocharger turbine shaft is not tightly sealed, it will also affect the oil combustion entering the intake pipe.

Due to the high-speed rotating parts inside the turbocharger, sufficient and stable oil must be obtained during the working process to ensure smooth lubrication and heat dissipation, so as to ensure the normal rotation of the turbocharger components. However, when the turbocharger turbine shaft is not tightly sealed, it can affect the leakage of oil into the turbocharger airway.

2.Poor piston ring sealing, check the condition of the cylinder liner, piston and piston ring. If the wear is severe and the gap is too large, the oil will run to the combustion chamber to burn.

At the same time, poor piston ring sealing can affect the blow-by of the engine and the increase of exhaust gases in the engine crankcase. The piston rings lost their effect, and the oil ran widely upwards to the combustion chamber to burn, emitting blue smoke.

3.Improper selection of oil viscosity. The symptom is that there is no blue smoke when it starts in the morning, and a small amount of blue smoke is expelled after the engine warms up. There was no blue smoke before. After changing to another type of oil, the blue smoke causes the acceleration function, but the oil is consumed too quickly, and the engine noise increases.

4.Long-term bad driving, long-term overload operation, etc. , the sail takes the engine to cause premature aging and wear.

5. The valve oil seal is aged, damaged or damaged, and the gap between the valve and the guide is too large.

Millions of car purchase subsidies.