How to tell if the valve oil seal of the car is broken, resulting in the burning of engine oil?

Identification method of burning engine oil:

1. Cool car burning engine oil: When you get on the car for the first time every morning, there will be a relatively thick blue smoke exhaust from the rear exhaust pipe. After a while, the blue smoke disappears, and there is generally no similar situation on the day.

2. Burn engine oil when accelerating: When the driver slams on the accelerator or steps 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 driving, the driver can see the blue smoke from the reflector on the exhaust pipe side.

3. Fill the vehicle with the phenomenon of "burning engine oil" with engine oil, let the owner go to the maintenance station to weigh the oil filter after driving 1000 kilometers, and then fill up the engine oil, and then let the owner drive 1000 kilometers. Repeated 3 times, to obtain an average value, after the run-in period of normal oil consumption can generally reach 1000 kilometers liters, if the standard is exceeded, there is a situation of burning oil.

Precautionary measures for burning engine oil:

1. Use high-quality engine oil

Engine oil is very easy to corrode and age in a long-term high temperature state, resulting in the oil film becoming thinner, and it is easier to escape to the combustion chamber to participate in combustion, so the use of high-quality engine oil can greatly delay this phenomenon.

2. Pay attention to the cleanliness of the fuel circuit

Fuel in the combustion process is indispensable to produce carbon deposits, and carbon deposits are the root cause of some car failures, such as the aging of valve seals, piston wall clearance, etc., all have a direct or indirect relationship with the formation of carbon deposits, considering the relationship between domestic oil products, it is necessary to use high-quality engine oil and (PNF) fuel additives to achieve, which is also the key to achieve no dismantling and repair to solve the problem of burning engine oil.

Does the vehicle with oil burn have to replace the valve rear oil seal? The correct way to check the valve seal is like this.

If the oil is burned due to the valve seal, the exhaust pipe will emit blue smoke during cold start in the morning, but there will be no blue smoke during normal driving or acceleration.

Disassemble the rubber tubing at the turbine outlet.

Or disassemble the hose in front of the throttle.

If there is a lot of oil on the surface.

It's that the turbine oil seal is worn.

For more information about the Volkswagen CC, please check Ekka.

With the elimination method, the cylinder pressure of all cylinders is first checked (to determine whether the piston rings are intact), if it is above the normal value, it can be suspected that the valve oil seal is broken, causing the engine oil to burn.

The exhaust cylinder emits green or blue smoke, and the engine oil is consumed a lot, in fact, you can go and check the valve oil seal.

The exhaust gas from the car is generally blue smoke and the taste is a little spicy.

The valve oil seal is broken, the intake valve is wet, and the exhaust valve has a thick carbon deposit.

Inspect the intake and exhaust tracts for heavy oil contamination.

Damn, look at the oil. Look at the pistons, too. Look at the cylinder head even more.

1. Measure cylinder pressure.

If there is a problem with the piston rings, the amount of wear is judged by the cylinder pressure data. If it is not very serious, or if it is a problem with a certain cylinder, it should be repaired automatically after 1500 kilometers by adding a repair agent.

2. Look at the exhaust port for blue smoke.

Blue smoke is the phenomenon of burning engine oil, mainly caused by the wear of pistons, piston rings, cylinder liners, valve oil seals, and valve guides, but first of all, it is necessary to eliminate the phenomenon of burning engine oil caused by exhaust pipes, that is, the damage of oil-water separator and PVC valve will also cause oil burning.

To judge whether the valve oil seal leaks, you can judge by the method of fuel valve and loose throttle, the blue smoke from the gas valve exhaust pipe is that the wear gap of the piston, piston ring and cylinder liner is too large; Blue smoke from the loose throttle exhaust pipe is caused by damage to the valve oil seal and wear of the valve guide.

Symptoms of an aging or broken valve seal.

1. The engine burns oil and emits blue smoke.

2. The carbon deposition of the spark plug is serious, and the engine power decreases.

3. The decrease in sealing leads to insufficient cylinder pressure and a decrease in engine power.

4. The oil consumption is accelerated, which directly leads to the engine bursting due to lubrication and cooling failure.

Does the vehicle with oil burn have to replace the valve rear oil seal? The correct way to check the valve seal is like this.

There are three most direct consequences of valve oil seal damage:

1. The oil enters the cylinder along the valve guide rod, resulting in the accelerated carbon deposition and greasy of the spark plug, the working condition becomes worse or even does not work, and the engine power is reduced;

2. The valve tilt cylinder seal is not tight, the cylinder pressure drops, and the engine power is weakened;

3. The acceleration of oil consumption can easily lead to the damage of the engine due to lack of oil in long-distance driving.

In addition, part of the carbon deposits in the engine oil after the oil entering the cylinder participates in the combustion, which makes the engine lubrication conditions worse and aggravates the wear of the engine.

Hello, it is not difficult to judge, but you need to have some foundation, such as an understanding of how the engine works and more extensive experience in repairing the engine. Although both are burning engine oil, there are big differences in some details.

1. The piston ring wear or counter-mouth will cause the cylinder pressure to drop, and the pressure difference between each cylinder and any two cylinders will be recorded one by one after measuring with a cylinder pressure gauge as a reference.

2. Open the oil filler port or pull out the oil ruler, if the gas discharged from the filler port or ruler tube is stronger, combined with the cylinder pressure value recorded before, the pressure difference value can be preliminarily inferred from the piston ring, cylinder wear or piston ring counterpart. Damaged valve seals do not result in large amounts of pulsating gas coming out of the oil filler port or oil gauge tubes, as the proper valve seals do not directly affect the cylinder's sealing performance.

If the oil is burned due to a leak in the valve seal, the following will happen: after starting the car in the morning, a large amount of blue smoke will come out of the exhaust pipe (especially in the cold season), and after about five minutes, the smoke will disappear, but not during driving.

If there is blue smoke when the car is hot, it may be a piston or a cylinder. If it is just needed, it may be that the valve oil seal is damaged.

Does the vehicle with oil burn have to replace the valve rear oil seal? The correct way to check the valve seal is like this.

There are three most direct consequences of valve oil seal damage:

1. The oil enters the cylinder along the valve guide rod, resulting in the acceleration of carbon deposition and oil pollution in the spark plug, the deterioration of working conditions or even non-working, and the reduction of engine power;

2. The valve tilt cylinder seal is not strict, the cylinder pressure drops, and the engine power is weakened;

3. Acceleration fuel consumption, which is easy to cause damage to the engine due to lack of fuel when the car is driving for a long time.

In addition, after the oil enters the cylinder to participate in combustion, some carbon is deposited in the oil, which makes the engine lubrication condition worse and aggravates engine wear.

What it does:

Stem seal is a kind of oil seal, generally made of outer skeleton and fluoroelastomer vulcanized together, and the diameter of the oil seal is installed with a self-tightening spring or steel wire for the sealing of the engine valve guide rod.

Valve seals can prevent oil from entering the intake and exhaust pipes, avoid oil loss, prevent gasoline and air mixtures and exhaust gas leakage, and prevent engine oil from entering the combustion chamber. Valve seals are one of the important components of engine valve packs. It comes into contact with gasoline and oil at high temperatures, so it is necessary to use materials with excellent heat and oil resistance, and are generally made of fluoroelastomers.

If the valve oil seal burns the engine oil, the exhaust gas of the exhaust pipe will generally appear to emit a relatively thick blue smoke, which means that the engine oil is burning. If the exhaust gas emits blue smoke, it is necessary to first eliminate the phenomenon of burning engine oil caused by the broken trachea, and if the oil leakage is caused by the valve oil seal, the valve oil seal is not tight in the combustion process, and the oil will generally appear thick blue smoke in the exhaust gas of the combustion process.

Valve oil seals. It is one of the valve seals on the engine, and the English is valve stem seal. Valve oil seal is generally made of vulcanized outer skeleton and fluorine rubber, and the diameter part is equipped with a self-tightening spring or steel wire, which is used for the sealing of engine valve guide rods, which is a kind of oil seal.

Since the valve seal works in a high-temperature and high-pressure environment, it is necessary to use materials with excellent heat and oil resistance. The commonly used materials for oil seals are: nitrile rubber, fluorine rubber, silicone rubber, acrylic rubber, polyurethane, PTFE, etc.

Symptoms of aging or damaged valve seals, engine oil burning, and blue smoke emitted from the exhaust pipe.

Second, carbon build-up in the spark plug causes the car to lose power.

Thirdly, the reduction in sealing performance will lead to insufficient pressure in the engine cylinders, and at the same time, the power of the vehicle will also decrease.

Fourth, the rate of burning engine oil is accelerated. In severe cases, the engine will lack cooling and lubrication, which will lead to pulling cylinders.

Does the vehicle with oil burn have to replace the valve rear oil seal? The correct way to check the valve seal is like this.

It's best to go to your car's 4S shop for professional personnel inspection to know what the specific situation is.