Diesel cars emit blue smoke when refueling and can t refuel at the same time

Blue smoke means burning oil, look at the oil dipstick. It may be that the piston rings of the cylinder liner are aging, or the oil is too much.

1.Check the oil pan for excessive oil levels. This is because the high-speed rotation of the crankshaft causes the oil to splash onto the cylinder wall and into the combustion chamber.

It is worth noting that when the oil level is too high, you must not take out the dipstick immediately after the engine stops working, because the lubricating oil splashed on the crankcase wall has not flowed back at this moment, and the dipstick must be pulled out after stopping for 10min.

2.Check the condition of cylinder liners, pistons, and piston rings. If the wear is serious and the clearance is too large, causing the oil to flow up to the combustion chamber for combustion, and at the same time the engine crankcase exhaust gas increases, the worn piston should be replaced in time.

The piston ring loses its effect, a large amount of oil goes up to the combustion chamber for combustion, and blue smoke is emitted, the piston ring should be removed, the carbon deposit should be removed, the piston ring should be correctly assembled, and the piston ring should be replaced if necessary. For new cars or cars that have just been overhauled, the lubricating oil will not be blown up due to the excessive gap between the piston and the cylinder. It is often the inner and outer cuts (or corners) of the piston ring that cause the lubricating oil to go up, which should be checked.

3.If the gap between the valve and the guide is too large and the oil is sucked into the combustion chamber in large quantities, the worn valve and valve guide should be replaced. For turbocharged engines, if there is oil burning, smoke is blue, but the power of the engine does not decrease, and the organic oil stain can be seen at the compressed air outlet or on the intake hose, it can be basically determined that the turbocharger is leaking.

The engine oil enters the combustion chamber with the air flow for combustion, at this time the supercharger should be replaced, and the lubricating oil should also be checked for contamination and replaced if necessary.

4.Check if the air filter is clogged. A clogged air filter will increase the resistance during the cylinder air intake and the air intake will not be smooth. There is a certain negative pressure in the cylinder, which also draws lubricating oil into the combustion chamber. Therefore, when blue smoke occurs, the filter should also be checked and cleaned.

If you emit blue smoke and can't add oil, you must have engine piston rings.

Blue smoke is a sign of burning engine oil, indicating that the piston ring of the cylinder liner is aging, or the engine oil is too much.

Diesel car You still drive a diesel car that is scrapped, probably is.

Is it less air intake and insufficient combustion.

This phenomenon is due to incomplete fuel combustion. When black smoke is emitted, it is often accompanied by a decrease in engine power, too high exhaust air temperature, and too high water temperature, which leads to wear of engine parts and reduces engine life. The causes of this phenomenon (there are many causes of incomplete combustion) and how to eliminate them are as follows.

1) The exhaust back pressure is too high or the exhaust pipe is blocked. This situation will cause insufficient air intake, which will affect the air-fuel mixing ratio, resulting in excessive oil volume. This is the case:

First, there are too many exhaust pipe bends (especially 90° bends), which should be minimized; The second is that the inside of the muffler is blocked by too much soot and should be removed.

2) Insufficient air intake or blocked air intake duct. In order to find out the cause, the following checks should be carried out: first, whether the air filter is blocked; the second is whether the intake pipe is leaking (if this phenomenon occurs, the engine will be accompanied by a harsh whistling sound due to the increase in load); The third is whether the turbocharger is damaged.

The blades of the exhaust gas wheel and booster wheel should be checked for damage and whether the rotation is smooth and flexible; Fourth, whether the intercooler is blocked.

3) Incorrect adjustment of the valve clearance, poor contact of the valve seal line. Valve clearance, valve springs and valve seals should be checked.

4) The oil supply of each cylinder of the high-pressure oil pump is uneven or excessive. The uneven oil supply will produce unstable speed and intermittent black smoke, which should be adjusted to make it balanced or within the specified range.

5) If the injection is too late, the advance angle of the injection should be adjusted.

6) If the injector is working poorly or damaged, it should be removed for cleaning and inspection.

7) Injector model selection is incorrect. Imported high-speed engine has strict requirements for the selected injector (injection hole diameter, number of holes, injection angle), if the choice is not appropriate, it will also cause the engine to emit black smoke, even if the same model of engine, in different use occasions (output power, speed, etc.), the injector model required to be used is not the same. If the incorrect injector is selected, the correct type of injector should be replaced.

8) Diesel is of poor quality or the grade is wrong. The imported high-speed diesel engine equipped with a direct injection combustion chamber with a porous injector has strict requirements for the quality and grade of diesel due to the small aperture and high precision of the injector, otherwise it will also cause the engine to emit black smoke and even make the engine unable to run normally. Therefore, clean and qualified light diesel oil should be selected, and it is recommended to use 0 or +10 in summer, -10 or -20 in winter, and -35 in severe cold areas.

9) The wear of cylinder liner and piston assembly is serious. When this happens, the piston ring seal is not tight, and the air pressure in the cylinder drops seriously, resulting in the diesel fuel can not be fully burned and black smoke is emitted, and the engine power drops sharply. Wear parts should be replaced.

The blue smoke is mainly due to burning engine oil. Reason: The oil level of the oil pan or the oil basin of the oil bath air filter is too high; The piston ring edge clearance is too large; Large gap between the valve stem and the valve guide; The gap between the cylinder liner and the piston is large, etc.

When the diesel vehicle emits blue smoke, the engine piston needs to be disassembled, observe whether the piston ring is matched, and if so, adjust the opening position of the piston ring; If it is not matched, it is necessary to measure the clearance of the piston and cylinder, and measure the end clearance of the piston ring, and compare it with the standard value provided by the engine manufacturer according to the actual measurement situation, and then determine whether it is necessary to replace the new parts.

Causes of blue smoke from diesel vehicles:

1. There is too much oil in the oil pan of the air filter. In the case of a hot car, the oil is diluted, and it is easy to be burned by the cylinder with people and the blue smoke is discharged, so the oil level in the oil pan cannot exceed the oil surface ring groove.

2. The oil pan oil increases, and the oil splashed on the cylinder wall also increases accordingly, and part of the oil is squeezed into the combustion chamber from the gap of the piston ring to burn, producing blue smoke.

3. The piston ring is counterparted, worn and the cylinder barrel clearance is too large. When the piston rings are aligned or cemented by carbon deposits, the oil on the cylinder wall cannot be scraped clean. Piston ring wear and excessive cylinder clearance will also reduce the oil scraping energy, and the oil will go up, which can cause blue smoke from the exhaust pipe, and in severe cases, it can also discharge the oil.

4. The run-in between the cylinder barrel and the piston group is not good. New cars or repaired cars, because the cylinder barrel and the piston, piston ring have not undergone a good run-in, there are residual machining traces on its surface, and the oil on the cylinder wall can not be scraped at the beginning of the work, and blue smoke will also be discharged. But after a period of running-in, it can be eliminated on its own.

Answer: 0 The valve stem and duct are too worn. In order to verify whether the blue smoke is caused by the excessive gap between the suction valve stem and the duct, the oil inlet channel at the valve can be temporarily blocked, the engine can be started, and the refueling test can be carried out. If the blue smoke from the exhaust pipe lessens or disappears, it proves that the large blue smoke is due to the excessive gap between the suction rod and the catheter.

Hello: Blue smoke is one of the important phenomena of burning engine oil. Please pay attention to check the amount of oil.

When burning engine oil, the higher the engine speed, the more oil will be burned, and the uphill speed is low, and the natural oil burning will be lighter. It is advisable to go to the repair shop where you overhauled your car to find out the cause. The causes of burning engine oil may be:

If the valve seal is damaged, the piston ring is faulty, or the cylinder is slightly pulled and other reasons, it is better not to take it lightly and repair it as soon as possible.

In the case of a diesel engine emitting blue smoke, burning oil, and there is no problem with the engine piston cylinder liner, the general situation is that the exhaust gas turbocharger is broken.

The main reason is that the oil leakage of the supercharger, the oil is channeled to the intake pipe or to the exhaust pipe, resulting in blue smoke or white smoke, it is recommended to check the supercharger and its pipeline.

If there are no problems with the supercharger and piping, then an engine overhaul is recommended.

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.

A number of reasons cause the engine to emit blue smoke as follows:1.There is a blockage in the air filter of a motor vehicle.

2.Excessive lubrication in the engine bottom oil pan.

3.The engine is under low load for a long time.

4.The piston rings inside the engine are jammed or worn too much.

5.The steel pads, pistons, and air cushions inside the engine are damaged.

Too much oil in the air filter, too much oil in the oil pan of the air air filter; Too much oil in the oil pan, etc.

Summary. Kiss <>

We'll be happy to answer for you. The situation that diesel cars can't afford to refuel and emit black smoke is as follows: There may be several reasons why diesel cars can't refuel and emit black smoke:

1.Fuel system problems: Some parts in the fuel system fail, such as fuel pumps, injectors, etc., resulting in the failure of fuel injection normally, resulting in incomplete combustion and black smoke.

2.Air Filter Problems: If the air filter is too dirty or damaged, it will cause insufficient air flow, resulting in incomplete combustion and black smoke.

3.Engine problems: Improper adjustment or failure of the engine, such as too large valve clearance, too low cylinder pressure, etc., will lead to incomplete combustion and black smoke.

4.Fuel quality problems: Poor fuel quality, such as too many impurities, too much moisture, etc., will affect the combustion effect of the fuel and produce black smoke.

What happens when a diesel car can't afford to refuel and emit black smoke?

The big jeep entered the car and was overhauled.

Kiss <>

We'll be happy to answer for you. The situation that diesel vehicles cannot afford to emit black smoke from oil is as follows: The reasons why diesel vehicles cannot afford to emit black smoke from oil may be as follows:

1.Fuel system problems: Some parts in the fuel system fail, such as fuel pumps, injectors, etc., resulting in the failure of fuel injection normally, resulting in incomplete combustion and black smoke.

2.Air Filter Problems: If the air filter is too dirty or damaged, it will cause insufficient air flow, resulting in incomplete combustion and black smoke.

3.Engine problems: Improper or faulty adjustment of the engine, such as too large valve clearance and low cylinder pressure, will lead to incomplete combustion and black smoke.

4.Fuel quality problems: Poor fuel quality, such as too many impurities, too much moisture, etc., will affect the combustion effect of the fuel and produce black smoke.

It may be that it was not repaired.

There is no fault code for the EFI truck.

The fact that the EFI truck has no fault code does not mean that the car is not broken.

Dear, do you have any overhaul of your car?

Which are the cases.

Pro, fuel system problems, air filter problems, engine problems, fuel quality problems. It's good to fix it <>, because there is a problem with decoding.

Changed the fuel injector.

Pistons and rings. If there is a problem with the decoding, you can try to refresh it first.

1.There are several reasons why diesel vehicles emit blue smoke:1.

The air filter is blocked, the air intake is not smooth or the oil level in the cylinder is too high, which reduces the amount of air entering the cylinder, changes the normal fuel mixing ratio, and leads to incomplete combustion of more oil and less oil; 2.If there is too much lubricating oil in the oil pan, the lubricating oil is easy to break into the combustion chamber during the operation of the diesel engine; 3.The piston rings are stuck or worn excessively, resulting in insufficient elasticity.

When installed, the piston ring chamfer is in the opposite direction, so that the oil enters the combustion chamber and discharges the blue steam smoke generated by the combustion of the lubricating oil; 4.The cylinder gasket near the oil circuit leading to the engine block head burns out, the piston and cylinder liner are worn, and the piston rings are opposed, causing the lubricating oil to flow upwards into the combustion chamber and burn with the fuel mixture.