Audi A5 burns engine oil, is the boring cylinder useful

First, the main reason for burning engine oil.

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 mounted at the front of the exhaust pipe and operates at a very high temperature, and the turbine and pump wheels can reach 120,000 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.

Second, the method of preventing the burning of engine oil.

1. Use engine oil that meets the technical requirements of the vehicle. Many car owners never read the vehicle manual, and they don't know what quality and viscosity grade oil their vehicles use for a few years, and there is a lot of arbitrariness in the use of engine oil. When using engine oil, one is to pay attention to the quality index, and the other is to pay attention to the viscosity index.

The quality index refers to the grade above SL as much as possible, and the viscosity index should be strictly in accordance with the provisions of the viscosity index in the automobile manual, and cannot be too low or too high.

2. Avoid frequent rapid acceleration and long-term ultra-high-speed driving. When the engine rotates at ultra-high speed, it is easy to break the lubricating oil film, resulting in poor lubrication and dry grinding of the rotating parts, and when it becomes a regular operation, it will make the engine wear abnormally and burn the oil, therefore, maintaining economic speed is one of the best ways to prevent the phenomenon of burning oil.

3. The oil must meet the specifications when filling. When the oil filling volume exceeds the center line, the repairman should be asked to pump out the excess oil, in addition, the oil volume should be observed before the next day.

4. If you find that the engine oil is burned, go to the maintenance station for inspection as soon as possible. If it is due to engine failure (such as poor piston ring sealing, valve oil seal leakage, cylinder gasket leakage, etc.), you should go to the maintenance station as soon as possible to check and repair the fault as soon as possible.

Hello, that depends on whether there is a problem with the turbine.

The intake manifold was clogged and a large amount of blue smoke was found, and Hu Jian explained that there was a large amount of carbon deposits in the oil entering from the air intake.

Under the long-term effect of crankcase exhaust pollution, the entire air intake system will be seriously polluted. In the picture, there is a thick carbon deposit on the intake valves. During the engine manufacturing process, the engineers put a lot of thought into making the entire intake and the inner wall of the intake valves as smooth as possible to achieve the highest intake efficiency.

The presence of carbon deposits can affect the smooth flow of air intakes and valves, reducing engine efficiency.

Dismantle the engine.

The three cylinder walls are severely worn, resulting in insufficient cylinder pressure.

Fuel vehicles often have excessive wear of piston rings and cylinder walls, which will reduce the air tightness and cylinder pressure in the cylinder. Once the density of gas prudence and filial piety deteriorates, it will aggravate the phenomenon of burning oil.

The three-cylinder piston was damaged, the piston was broken, and a thick layer of carbon deposits on the valve was also deposited on the cylinder head.

The carbon deposition of the nozzle is serious, and the individual oil holes of the nozzle are blocked. This can lead to a drop in vehicle power, idle jitter, and distorted fuel injection control. Therefore, when repairing such an engine, the fuel nozzles should be especially cleaned to ensure that each fuel nozzle is clear.

Cleaning the engine cylinder head after removing the engine parts.

Clean the valves, clean the other parts of the engine, replace the pistons, reassemble the engine, and the engine runs normally.

Although the symptoms of burning oil and shaking the car have been eliminated after the overhaul, I still consulted Mr. Shi, the technical director, with the attitude of breaking the sand pot to the end. Mr. Shi told several reasons: 1

Audi A5 ( Check price |In the design process, the requirements for fuel quality and oil quality are high, but the lack of domestic fuel quality leads to serious carbon deposition in the engine; High fuel consumption is common in engines. There are many reasons for the design, among which the oil-air separator is the most important issue.

It's still going to burn the oil.

There are two ways to solve the problem of burning engine oil

Overhaul Lee dress. PNF restoratives.

Benefits of this one:In the case of overhaul, the cost is very high, the vehicle depreciates quickly, and the later run-in is also very troublesome. First of all, you have to find out the reason for your burning oil, oil circuit blockage, carbon deposits, piston ring stagnation can be repaired with PNF repair agent, there are many riders who have successfully repaired the old bush through PNF repair agent, you can refer to it.

The problem of burning engine oil in Audi cars is already an open secret, and it is also a common problem of Audi cars. So, you should pay attention to this issue when deciding to buy an Audi car. How to solve it?

It is recommended that you first go to the 4S store for consultation; In addition, you should pay attention to the refueling situation when you usually use the vehicle, especially the exhaust emission situation, and go to the 4S store to check the vehicle as soon as possible once it is abnormal.

There are two general solutions to burning engine oil, either go to the 4S shop for overhaul, or directly change the engine, but they are not very good suggestions, because it is difficult to ensure a complete solution to this problem, I myself have always used some good engine oil, before using imported Jin Mobil, and then used G T magic red engine oil, although it can not solve the problem of burning engine oil, but G T magic red engine oil is the base oil of PAO, the protection ability of the engine is good, do not worry as before, the power has also improved, The maintenance cycle has also been extended a lot, I only maintain it at 15,000, and I maintain it once a year.

First of all, it is important to determine under what circumstances your car burns engine oil, there is more than one phenomenon of burning engine oil. How can you tell if you burn engine oil? 1. Check whether there is blue smoke in the exhaust emissions;

2. Check whether there is often a shortage of engine oil (except for oil leakage); Note: When the engine oil is at high temperature, oxidation (leakage), etc., there must be wear, generally a small amount of wear. Don't mistake it for burning engine oil;

3. Burning engine oil caused by adding too much engine oil (this phenomenon is less, but it also exists.) I really hope that your car is caused by this reason, so that you don't have to lose time and incur **);

4. Whether the power of the car decreases (the power decreases after the compression ratio decreases) and other steps can be used to determine whether the engine oil is burned. This aspect can be measured in a primitive way, that is, the cylinder pressure (you can also pour a little oil to measure the cylinder pressure comparison), if the cylinder pressure is not enough, at least it means that the piston ring has a poor seal, and the severity of the oil burning can also be inferred according to the cylinder pressure.

Causes of burning engine oil: 1. Burning engine oil in a cold car: When the temperature of the car is not completely warmed up, the engine exhaust pipe emits a lot of blue smoke, but it is normal after the car is heated.

This phenomenon is caused by the aging of the valve oil seal. Due to the decrease in temperature, the valve oil seal of the rubber material is stiff and cannot be completely sealed, and the oil leaks from the valve into the combustion chamber and burns. Workaround:

The engine cylinder head can be removed and the valve oil seal replaced.

2. Hot car burns engine oil: After the car reaches the normal temperature, the exhaust pipe still emits blue smoke, which indicates that the piston ring has a poor seal. Due to the poor sealing of the piston ring, the oil directly enters the combustion chamber through the piston ring leakage under the action of the oil pump, and there is a phenomenon of blue smoke from the exhaust pipe.

There are several reasons for this phenomenon, such as: material aging, carbon deposition jamming, excessive wear of cylinder liners, etc. Workaround:

According to the normal operation method, the engine needs to be lifted down for overhaul work. The repair time is about 2-4 days. There is another way to deal with it:

If it is determined that the oil is burned by the hot car and it is not very serious (for safety reasons, the cylinder pressure test can be carried out first), the oil pan can also be disassembled directly, the piston can be taken out directly, and the piston ring can be replaced.

Many cars have the problem of burning engine oil, there are two general solutions, either go to the 4S shop for overhaul, or directly change the engine, but it is not a very good suggestion, because it is difficult to ensure a complete solution to this problem, I myself have always used some good engine oil, before using imported Jin Mobil, and then changed to GT engine oil, although it can not solve the problem of burning engine oil, but GT engine oil is the base oil of PAO, the protection ability of the engine is good, do not have to worry as before, the power has also improved, The maintenance cycle has also been extended a lot, I only maintain it at 15,000, and I maintain it once a year.