Why do cars emit blue smoke? What s going on with the blue smoke coming out of the car?

Hello. 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.

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The consumption of this lubricating oil is mainly caused by the blue smoke of the cool car

The upper combustion of the engine: the aging of the valve seal, the clearance of the valve guide is too large, the lower combustion of the engine is not working well of the crankcase ventilation check valve: the matching gap between the piston and the cylinder block is too large, the tension of the piston ring is reduced or stuck, and the strain of the cylinder wall In fact, the lubricating oil is also normal consumption in good condition, and the standard consumption is generally not more than liters per 1,000 kilometers.

But when the car is in poor condition, some cars will emit blue smoke from the exhaust, in fact, this means that the lubricating oil consumption is too large, generally speaking, the abnormal consumption of lubricating oil is nothing more than two situations, entering the combustion chamber to participate in combustion, or oil leakage.

In this case, you need to pay attention to whether there is blue smoke at the moment of start-up or a slight combustion during driving, at this time, you can use the sunlight ** when the engine speed is stable at about 2500 rpm when the sun is shining** whether the gas color of the exhaust pipe is blue. If it is, it means that the piston ring is not strong enough or stuck in the piston ring groove, if it is only an instant blue smoke, it means that the valve oil seal rubber is too hard and the seal is not tight.

The slight blue smoke from the car is caused by the cold start of the car, which is not a big problem, and the owner does not need to worry too much. If there is a serious blue smoke from the car, it may be that there is a problem with the tightness of the car parts. The reason for the blue smoke from the exhaust pipe of the car is that the use of substandard engine oil, or the engine oil has not been replaced for a long time, the reason is that the engine oil is too thin and the combustion is not sufficient.

The solution is to replace the qualified oil. Caused by the start of the large throttle of the cold car, the quality of the gas mixture involved in the combustion is not good, or it is caused by the aging and damage of the filter and the failure to replace it. The duct and valve wear out during operation, making the gap between the two too large, and during the air intake, excess oil in the rocker chamber is drawn into the combustion chamber for combustion.

The piston ring is stuck in the ring groove due to carbon deposits, which makes it lose its elasticity and cannot work normally. The solution is to replace the piston rings if necessary, or remove the piston rings to remove the carbon deposits inside.

The oil pan of the oil tank has too much oil, but the crankshaft is rotating at high speed, causing the oil to splash into the combustion chamber and into combustion. The solution is to use an oil scale to check the oil level and remove the excess oil. Serious wear of the cylinder liner and piston assembly leads to excessive clearance, and a large amount of oil will be incorporated into the combustion chamber from the gap during the operation of the engine.

The solution is to replace the damaged parts.

Blue smoke is because the engine burns lubricating oil when it is working, if it only comes out for a while when it starts, it is not too big, if it has been emitting after starting, it is necessary to check the engine, find out where the oil enters the cylinder, and then solve it.

When the engine is working, the high-pressure combustible mixture and combustible gas in the combustion chamber will leak into the crankcase more or less through the gap between the piston group and the cylinder, causing blow-by. The composition of blow-by gas is unburned fuel gas, water vapor and exhaust gas, which will dilute the engine oil, reduce the performance of the engine oil, and accelerate the oxidation and deterioration of the engine oil.

Causes of blue smoke from engine exhaust pipes:

1. Improper use of engine oil.

In many cases, the main reason for the white smoke emitted from the start of the car is that due to the use of substandard engine oil, the engine will be loaded under the long-term high-temperature operation of the car, the power of the oil pump pump is insufficient, and it will affect the life of the engine, and it will cause the engine to burn oil.

2. Poor piston sealing.

There is also a situation where there are scratches on the cylinder wall, poor piston sealing, and valve wear resulting in gaps, which enter the gasoline combustion chamber to participate in combustion, and when the combustion is not full. When it is divided, it produces blue smoke.

3. Wear and tear of pipes and valves.

When pipes and valves are worn, excess oil enters the combustion chamber and burns can lead to the formation of blue smoke from the exhaust pipe of the car.

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If it is a gasoline car emitting blue smoke, it generally means that there is a situation of burning engine oil, most of which is caused by excessive wear of valve seals and piston rings. It is recommended to maintain it in time, and long-term burning of engine oil will lead to serious carbon deposition in the combustion chamber, reduce the volume of the combustion chamber, have a serious impact on the three-way catalytic system, and increase environmental pollution.

Blue smoke from a car is usually caused by incomplete fuel combustion, engine wear and source oil combustion, oil blockage in the cylinder, etc. Specifically, there are several problems and ways to deal with them:

1. Incomplete fuel burning: This is one of the most common causes of blue smoke from cars. When the engine burns the fuel, the fuel is not completely burned, and the resulting attitude causes a large amount of smoke to be emitted in the exhaust pipe, which is manifested as blue smoke.

The reasons for this can include poor fuel quality, unclean air filter, and more.

2. Engine wear leads to oil combustion: If the vehicle engine is seriously worn, the oil is easy to enter the cylinder for combustion, thus causing blue smoke.

3. Oil blockage in the cylinder: The piston, piston ring, cylinder wall and other components in the cylinder all need lubricating oil to relieve friction. If the engine oil flows into the combustion chamber of the gasoline engine, it will also mix with air and gasoline, resulting in combustion.

In this way, the oil will produce a lot of blue smoke during the combustion process.

The specific method of treatment depends on the cause of the blue smoke, and here are some possible ways to deal with it:

1. Replace the air filter: If the air filter is too dirty or aging, it may lead to incomplete fuel combustion and emission problems of the car, so it is recommended to replace and maintain the air filter in time.

2. Replace the fuel system: If the fuel quality of the car is not good or there is a problem with the fuel system, it must be replaced to ensure the normal fuel combustion of the car.

3. Go to the maintenance station to check the oil usage and find the cause of the problem of controlling the oil consumption.

4. Replace the scaled piston ring: If the piston ring has been scaled or hardened, it is recommended to replace it to prevent leakage or oil loss to eliminate the problem of blue smoke.

5. Tighten the filter, clutch, valve, etc.: If you find that the filter, clutch and valve of the car are loose, you need to tighten them in time to avoid the problem of troublesome car use and blue smoke.

If you find that the car emits blue smoke, find a professional car repair shop for maintenance, which is a good thing for car safety and environmental protection.

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.

Blue smoke from a car is usually caused by the engine burning oil. The role of engine oil in the engine is to lubricate and cool the engine parts, prevent friction and wear, and improve the efficiency and life of the engine. However, if the oil is burned in the combustion chamber, there will be blue smoke.

There are several possible causes of oil burning:

1.Piston ring damage: Piston rings are one of the key components to seal the combustion chamber of an engine, if the piston rings are damaged, it will cause oil to enter the combustion chamber, causing the phenomenon of blue smoke.

2.Oil seal aging: The oil seal is the seal between the various parts of the engine, if the oil seal is aging and damaged, it will lead to oil leakage and cause the oil to burn out.

3.Clogged oil circuits: If these components fail or the oil circuits are blocked, the engine oil will be empty and the oil will run out, which will cause the oil to burn out.

4.Engine aging: With the increase of engine life, the wear and aging of various engine components will lead to an increase in oil consumption, which will also cause oil to burn out.

If the car emits blue smoke, it needs to be checked and solved in time. Generally speaking, it is necessary to find a professional car repair shop for overhaul and repair to ensure the normal operation of the engine.

It is usually caused by the engine burning oil, for example, the gap between the piston ring and the cylinder is too large, causing the oil to escape into the combustion chamber, and you will see blue smoke from the exhaust.

What is the cause of blue smoke from a car

1. The valve oil seal is aging, and the hardening cannot be thermal expansion and contraction with the temperature of the valve, resulting in the oil entering the cylinder from the oil seal when it is cold started.

It is manifested as blue smoke in the morning when it starts cold, but not after a hot car. Excessive oil consumption.

Solution: Use additives to restore the activity of the rubber ring in the cylinder body or replace the valve seal.

2. The viscosity of the engine oil is not selected correctly

It is manifested as no blue smoke when starting in the morning, after the hot car, there will be a small amount of blue smoke discharged, there was no blue smoke before, after changing another engine oil, the blue smoke is generated, and there is a speed acceleration function when accelerating, but the oil consumption is too fast, and the engine noise increases.

Solution: Replace the oil with the right viscosity.

What is the cause of blue smoke from a car

3. The cylinder is deformed, the carbon and dust in the lubricating oil splash to the cylinder surface with the oil, the engine lubricating oil temperature is too high, the oil becomes thinner, and the cylinder is excessively worn, resulting in an increase in the gap with the piston ring, and the gap between the valve and the valve guide is increased due to the wear, and the oil enters the cylinder from the gap to participate in combustion.

The smoke discharged is blue-white, and the white oil smoke smell is discharged when the oil cap is opened, which is the so-called engine "panting" phenomenon, and the engine power is significantly reduced. If it is a new car or a car after overhaul, the new car does not run in well when it is closed, resulting in unexpected wear and tear acceleration.

Solution: Use additives to repair the cylinder.

Use high-viscosity engine oil that can withstand high temperatures.

Use the best oil filter to speed up the heat dissipation of the oil.

4. Due to the generation of carbon deposits, the piston ring loses tension, the seal is not tight, and the oil enters the cylinder from the gap.

The manifestations are: no or very little blue smoke during cold start in the morning, mainly after acceleration and hot car, more blue smoke is generated. The power has decreased, the cylinder pressure seal performance has decreased, and the oil consumption has increased relatively.

Solution: The tension of the piston rings must be restored, the inside of the engine must be effectively cleaned, and the repair function of additives must be used or replaced.

5. The PCV valve is stuck, and the combustible mixture enters the crankcase, which makes the oil deteriorate and thin, thus entering the combustion chamber to accelerate the consumption of oil.

The performance is: the power decline period and consumption of the engine oil are accelerated, and the power is obviously insufficient.

Solution: Replace the PCV valve.

Carry out the necessary cleaning of the cylinder block.

Check the cylinder gasket and other accessories for damage.

Repair or replace the cylinder block.

Blue smoke from cars is a comprehensive problem that needs to be eliminated by professionals one by one. And the content we introduce is just to provide you with a solution idea, non-professionals, or it is recommended to consult the car service agency to solve it!