Is it useful to burn engine oil and change the oil seal of the BMW 5 series

Hello, this oil seal replacement has a certain effect, if my answer is helpful to you, please set to.

Hello, the vehicle burning oil does not rule out the problem of aging oil seal, or the piston ring seal is not good caused by the normal vehicle cylinder liner wear problem, I hope to help you, hope.

Hello, it depends on what's broken.

About 800-1000 yuan.

If you go to the auto repair shop to replace the original oil pan, it will be about 800 yuan, and then it will help you refill the new oil, so the total cost is about 1000 yuan. But if it's going to a 4S store.

The replacement has to be mentioned separately, and the cost may reach more than 1500 yuan, after all, the working hours of the 4S store have made it difficult for many partners to accept. So, a project like replacing an oil pan is not very complicated, in fact, we can go to a large-scale auto repair shop to replace it.

Car engines.

Oil pan considerations.

Oil pans can be divided into wet and dry types. In addition, we need to understand two concepts, splash lubrication: in the case of engines, through the crankshaft.

The rotation brings up the oil in the oil pan and "splashes it on the source hail sail" friction surface to achieve lubrication; Pressure lubrication: The oil pump pumps the oil and sends the oil to the required parts at a certain pressure to achieve protection.

Dry sumps are used in many racing engines. It does not store oil in the oil pan, more precisely, there is no oil pan. The friction surfaces of these movements in the crankcase are lubricated by pressing out the oil hail through the measuring holes.

Since the dry sump engine cancels the function of the oil pan to store oil, the height of the pan is greatly reduced.

The causes of BMW's engine oil burning and how to prevent it.

The engine oil itself has a certain amount of consumption, and excessive consumption is the problem of burning engine oil. There are many factors that affect the burning of engine oil, such as: fuel quality, driving conditions, driving habits, maintenance habits, etc., the following reasons will aggravate the oil consumption and cause the burning of engine oil, so that the vehicle appears:

1. Carbon deposition occurs in the combustion chamber, which makes the gas ring of the piston ring stuck, and the sealing is poor.

2. Oil sludge is generated in the lubrication system, and the oil sludge blocks the oil return hole of the oil ring and weakens the oil scraping performance.

3. Wear occurs between the piston and the cylinder wall.

4. The valve seal is corroded and aging, and the sealing performance fails.

In addition, cars now have crankcase ventilation systems (exhaust valves), which can also exacerbate oil consumption if there is a problem.

Burning engine oil means that the engine oil enters the combustion chamber of the engine and participates in the combustion along with the mixture. The phenomenon of "burning engine oil" in the vehicle will damage the vehicle's oxygen sensor too quickly, resulting in an increase in carbon deposition in the combustion chamber, unstable idling, weak acceleration, increased fuel consumption, and excessive exhaust emissions.

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.

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 amount of oil filling is too much.

When the oil is filled above the center line, due to the high oil pressure, the part of the engine lubrication process through splash lubrication will be too much into the combustion chamber for combustion.

3. Oil leakage from turbocharger.

The turbocharger's turbine shaft uses 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.

Hope it helps, hope!

First of all, see if there is a large amount of blue smoke coming out of the exhaust pipe when the vehicle is parked for a period of time; Secondly, after starting the engine, whether there is a large amount of blue smoke coming out of the exhaust pipe when you slam the accelerator pedal and accelerate sharply; Finally, after a month of maintenance of the vehicle or about 1000 kilometers, check whether the oil dipstick has exceeded the lower oil limit.

If the vehicle is visibly colored with smoke coming out, or the dipstick scale is dropped, it proves that the vehicle burns oil severely. First of all, BMW's valve oil seal is aging, and the oil enters the combustion chamber from the valve for combustion; Secondly, the BMW piston ring is worn, especially the oil ring is stuck, and the gap between the piston and the cylinder barrel is worn too much. This large gap results in a loose seal, and the oil cannot be scraped off by the piston ring and burn in the cylinder; The second is that the BMW turbocharger bearing is damaged, causing a leak.

Leaking oil is sucked into the cylinder by the intake tract for combustion; Finally, the BMW crankcase ventilation valve is damaged, which is easy to cause the occurrence of engine oil burning.

The fully synthetic motor oil used by BMW is less viscous, has good fluidity, and is more volatile. In addition, the large gap between the piston and the piston ring of the BMW engine can eventually lead to oil burning. In fact, foreign countries believe that the consumption of organic oil in automobiles is quite normal, as long as it is within the national standard, it is not surprising to buy BMW to burn engine oil, after all, most German cars have the phenomenon of burning engine oil.

1.Because the domestic fuel quality is not synchronized with international standards, it is easy to form a large amount of carbon deposits in the combustion chamber during the engine driving process, and carbon deposits are the root cause of various problems in the engine.

2.Carbon deposits can be deposited in the grooves of the piston, causing the piston rings to stick together, resulting in the piston rings not being fully sealed.

3.Carbon build-up can exacerbate wear between the piston and cylinder walls, resulting in too much clearance and oil entering the combustion chamber.

4.Valve oil seal corrosion and aging, resulting in poor sealing, valve oil seal can be said to be the most vulnerable parts in the engine to age, basically driving.

It is very normal for the car to burn oil, and generally to solve these phenomena, it is necessary to overhaul the engine to replace the piston ring, etc., even if it is repaired, this kind of problem will occur after driving for a period of time.

Exhaust valve, oxygen sensor, piston piston ring, three-way catalysis.