How to see if the engine is faulty, and burn the oil

Burning engine oil exhaust emits blue smoke.

Hello, this can be observed by the exhaust color of the car, if this is blue smoke, this is burning engine oil.

1. Cool the car and burn the engine oil.

Generally, the cooling of the car refers to the first time in the morning to burn the oil.

Judgment method: When you get on the car for the first time in the morning, there will be a relatively thick blue smoke coming out of the rear exhaust pipe. After a period of time, the blue smoke disappears, and there is generally no similar situation on the day (if the previous situation has been in place for a long time, there may be blue smoke when the engine is stopped in place for a long time). The same problem occurred the next morning, and otherwise there was no blue smoke.

If this happens to your car, it is a cool car burning engine oil.

Reason: Due to the long-term use of the valve seal, the valve oil seal is aged and worn severely.

2. Burn the engine oil when accelerating.

Judging method: when the driver slams on the accelerator or when the car slams on the accelerator when the vehicle is moving, a large amount of blue smoke is discharged from the exhaust pipe, and when the driver slams the accelerator when the vehicle is moving, the driver can see the blue smoke from the reflector on the exhaust pipe side.

Reason: Due to the poor sealing of the piston ring on the engine piston on the cylinder wall, the oil jumps directly from the crankcase to the cylinder during rapid acceleration, resulting in oil burning.

3. Burn engine oil under any circumstances.

This situation shows that the engine has been worn out quite seriously, and the engine needs to be overhauled, and if it is not repaired in time, it will cause a more serious accident hazard.

Based on the maintenance experience and the characteristics of the model, the reasons for burning engine oil can be roughly summarized as follows:

1. Because the domestic fuel quality is not synchronized with the international standard, it is easy to form a large amount of carbon deposition in the combustion chamber during the engine driving, and carbon deposition is an important reason for various engine problems such as burning engine oil.

2. Carbon deposits will be deposited in the grooves of the piston, causing the piston rings to stick together, which will cause the piston rings to be stuck and unable to be completely sealed, and the oil will enter the combustion chamber and burn off, while the "sticky" piston rings greatly reduce the ability to scrape oil seals, and the oil that has not been scraped off will also be burned off.

3. If the sludge formed for a long time is not cleaned, it will also block the oil return hole on the piston ring, resulting in the oil being unable to flow back normally, so that the oil will be left in the combustion chamber for combustion.

4. Carbon deposition will aggravate the wear between the piston and the cylinder wall, resulting in too large a gap, resulting in the oil entering the combustion chamber and burning off.

5. The valve oil seal is corroded and aged, resulting in poor sealing, and the oil will leak into the combustion chamber and burn out. Valve seals can be said to be the most vulnerable parts in the engine that are prone to aging, and basically cars that have driven more than 100,000 kilometers have this problem.

How to see if the engine burns oil? Vehicle oil burning usually refers to the engine lubricating oil infiltrating into the cylinder to participate in combustion, through the following methods can be judged whether the vehicle has a fault of burning engine oil.

First, whether the vehicle emits blue smoke.

When the piston ring sealing effect of the engine is reduced, or the residual lubricating oil on the cylinder wall is not cleaned, the excess oil will remain in the combustion chamber and be burned together with the mixture, and the exhaust gas after combustion is usually blue with a pungent burnt smell. In addition, in addition to piston ring damage that can cause oil to enter the cylinder, damage to the valve seals can also lead to oil burning. Valve seals are usually made of rubber and plastic, and when they work in a high-temperature environment inside the engine, they harden and lose their elasticity over time, and the oil will flow down the valve stem into the cylinder to participate in combustion.

Therefore, to distinguish the real sense of the engine oil failure, you can judge by the exhaust emission color.

Second, whether the oil consumption is greater than the normal consumption in a fixed cycle.

It is generally believed that the oil consumption should not exceed 1 liter for 1000 km, but different models have different regulations, which can be referred to the vehicle's maintenance manual. During the initial 10,000 km run-in period of the new car, the oil consumption may reach 1,000 km per liter; After 10,000 km, the oil consumption will remain within 1,000 km. The owner can rely on this data to observe, check the oil level before using the car and make a record, and after a cycle, you can judge whether the vehicle has an oil burning fault.

Third, whether the vehicle has oil leakage.

Leaking engine oil is not the same as burning engine oil, but they can also lead to a loss of engine oil. If you want to determine whether the vehicle has a real oil burning fault, rather than an oil leak caused by an oil leak, you must first rule out the problem of oil leakage in the vehicle. For example, the internal oil seal of the turbocharger is damaged, causing the oil to flow into the exhaust pipe for combustion and evaporation, such an oil leakage phenomenon is very hidden, and the leakage point can only be found after careful investigation.

After eliminating the phenomenon of oil leakage in the vehicle, if there is still a frequent shortage of oil, it can be basically determined that the vehicle has a fault of burning oil. The above three points are common methods for judging the burning of engine oil in vehicles, and when applying, it is necessary to judge the results after combining the three methods, rather than meeting one of the conditions to think that the vehicle has a fault of burning engine oil.

The main reason for burning engine oil.

1.It is the problem with the fittings, the wastegas valve, the valve seal, the cylinder pulling the cylinder, and the cylinder pressure is insufficient. Xianlu refers to checking the reason for burning engine oil-related accessories and eliminating related parts problems.

2.It is a long-term unclean oil circuit, the antifreeze is not replaced in time, the oil service life is too long, the piston ring is stuck, and the more common situation is that the piston ring is stuck. Through the first step to eliminate the problem of related accessories, it is determined that the piston ring is stuck and the oil burning problem caused by Senwu.

Causes of piston ring seizure.

Stagnation starts from the oil circuit, the oil withstand the temperature at 110 degrees, and the high temperature caused by the long-term unclean oil circuit makes the oil at a temperature of 120 degrees or higher for a long time, so that the oil will fail in advance, the small hole of the oil ring is very small, and the oil inside will be dried and scabbed for a long time. Therefore, in order to solve the problem, we must start from the root oil circuit, which is the way to remove the root.

There are two ways to solve the problem of burning engine oil, one is overhaul, and the second is PNF repair agent. 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 need to find out the reason why you are burning engine oil.

There are many reasons for engine oil failure, maintenance ** in the range of 300-10,000 yuan, the reason for the engine oil burning in the car engine:

1. The wear of the cylinder liner and piston will make the gap of the cylinder wall larger, causing part of the oil to flow into the combustion chamber for combustion;

2. The wear of the piston jujube ring, the elasticity of the piston ring is weakened or broken, and the piston ring is matched (several piston rings are in a straight line), resulting in poor sealing and part of the oil entering the combustion chamber for combustion;

3. The aging and damage of the valve oil seal will also allow some oil to enter the combustion chamber for combustion, especially the aging and damage of the intake valve oil seal is more likely to allow the oil to enter the combustion chamber for combustion;

4. The engine exhaust pipe (the oil chamber passes through the engine inlet pipe) is blocked, resulting in the pressure of the oil chamber being too high and causing part of the oil to flow into the combustion chamber for combustion;

5. The hedging between the cylinder gasket oil duct and the cylinder will also cause part of the oil to flow into the combustion chamber for combustion. How do you repair a vehicle by burning oil? How much? Let's talk about the reason for burning oil first. It's hard to estimate how much it will cost, and it's not the same for different models!

What is the cause of burning engine oil?

1.Blocked bonnet exhaust valves (exhaust pipes) or normally open check valves will burn oil!

There is also a very important check valve on the engine that causes the oil to burn!

Typically, the valve chamber cover will have an exhaust valve or check valve. If it is blocked, the next return of the engine cannot enter the intake pipe normally, and the negative pressure of the engine will force the oil to enter the intake manifold, and then mix with the engine mixture to participate in the combustion of the Sosun car, resulting in oil combustion!

For example, a clogged exhaust pipe in the Passat can cause oil to burn, and a clogged exhaust valve in the Cruze valve chamber cover can cause oil to smoke when accelerating!

2.Turbochargers burn oil!

The turbocharger will burn the oil more or less, but a damaged turbocharger will burn the oil too much!

This standard mainly depends on the amount of oil in the intercooler to decide how much oil to burn!

By checking the level of the oil.

Blue smoke is also a typical manifestation of burning engine oil.

Blue smoke from the engine exhaust and a decrease in engine power.