[Guo Zi Chats on the Car] Volkswagen Sharan’s 10-hour tear-free engine oil treatment process shared by car friends-Jiangyin
YettaTony 
9 Abide by the rules and regulations, there is no public product, manufacturer, technical side information, please forgive me, but private letter.
Xia Lang, from 3000KM burning one liter, to 2000KM burning one liter, to 1000KM burning one liter of oil, after repeated weighing, is it an overhaul, a change of engine, or a disassembly-free treatment to burn oil? Finally, it was put on the elevator of the repair shop and put on the “red dress”.
Change the car is the worst policy, change the engine is the worst policy, do not consider. Overhaul quotation 13000 yuan, demolition-free treatment of burning oil to save half of the money, equivalent to 1-2 years of burning oil money, acceptable. Overhaul burning engine oil treatment, the essence is to change the piston ring, oil seal, waste gas valve three-piece set, other money is spent in vain, this one. Second, there are only two results of overhaul: repair and repair, everyone is happy to repair, and a dispute or even a lawsuit cannot afford to be repaired. Third, repaired, the original engine is also gone, accelerated devaluation, second-hand car evaluation, even if the loss of 20-30%, it is tens of thousands of bar. The calculation may not be correct, and the cyclists have different opinions. Fourth, now the 1000KM burns a liter of oil, and when 500KM or even 300KM burns a liter of oil, the car is basically useless.
May I ask you, T turbocharging, S mechanical supercharging, I direct injection. Is this a T+S+I or a castrated Tunable I?
138000 kilometers. But “burning” is not light. Often running on the highway on the oil alarm, for fear of no oil lubrication, the engine strike. It doesn’t matter if we go on strike, there will be a terrible accident.
Turbocharged oil leak check before construction, a little bit, it’s okay.
Four spark plugs are removed, and the three cylinders are different. Serious carbon deposition, damp (engine oil).
Cylinder pressure check.
The cylinder pressure looks normal. But it may also be the illusion that carbon deposition temporarily blocks the cylinder gap. The riders looked down.
Spark plug appearance, there is a problem pointing to the three cylinders; cylinder pressure appearance, does not explain the problem; the oil on the carbon deposit shows the problem. The riders continued to look down.
Checked the forum post overhauling the EA888 engine, found that the culprit of oil burning here-piston ring (the top two are gas rings, the third is oil rings) stuck.
The man behind the oil burning is here. The reticulated cylinder wall of Volkswagen and Audi EA888 engine is designed for Germany’s unlimited speed highway (250 yards). When the domestic speed limit is 120 yards, a large amount of oil storage function of the reticulated cylinder wall leads to burning engine oil. There are disputes and opinions on this point, but the public officials will not give an explanation.
The oil-burning accomplice is here. Valve oil seal aging. BMW oil burning is mainly due to the valve oil seal problem, but in Volkswagen and Audi cars, the builders believe that the valve oil seal is not the main cause, because Volkswagen Audi more than 100,000 kilometers down, the valve oil seal problem is not big, mostly aging.
The oil-burning gang is here-the waste gas valve. It is generally accepted that the primary separation of waste gas valve, oil and gas separation is not good, there is no dispute. The construction side believes that when the clearance of the piston ring increases, the high temperature and high pressure gas channeling of the crankcase exceeds the load of the exhaust gas valve, causing the oil to burn into the combustion chamber.
Horizontal engine, remove the right front wheel cylinder.
Disk vat. Level the piston.
Get even.
Liquid added to the bubble tank. The core password of the technical side is here. The liquid needs to be soaked for 6 hours, and the technician says that through the pan cylinder, the liquid will remove the sludge from the piston ring. Whether it can be realized or not, let’s look down.
One and a half hours later, check 1, 2, 4 cylinders of liquid, normal.
Check 3 cylinders of liquid, there is a problem: all leaked out.
The technical side explained that before the 3-cylinder was not filled with liquid, the carbon deposition sealed the cylinder gap, so the cylinder pressure was normal. After the carbon bubble opened, due to the large gap between the three cylinders, the liquid seeped down at once. This is also the reason why a large amount of oil goes up to the combustion chamber, and it is also the reason for the spark plug to accumulate a lot of carbon. How to deal with it, listen to me continue to decompose.
3 cylinders were injected with treatment solution.
The boy changed the cylinder for 2 hours. Thank you for your hard work.
3 cylinders were re-injected.
One and a half hours later, the fluid was checked and the leakage was stopped successfully. The technical side said that after emergency technical treatment, the sludge of the 3 cylinders has been removed and the piston ring has popped out, as evidenced by the fact that the cylinder is not leaking. At this point, the effectiveness of products and technology is no longer questioned.
1, 2, 4 cylinders re-add liquid, into 6 small is the normal operation of the bubble cylinder.
Normal cylinder operation for 6 hours.
Six hours later, the tank began to be cleaned.
Endoscope check in the cylinder.
The carbon deposition at the top of each cylinder has been removed and the piston ring cannot be photographed, but the effect of the three cylinders can be inferred from the cleaning effect of the piston ring of each cylinder.
The replacement of the waste gas valve, all oil, self-invalidation of martial arts.
Newly replaced exhaust valve.
Hit the car, the engine runs smoothly, the water temperature is normal, everything is normal.
Exhaust smoke immediately. The workshop is full of smoke. The line is clear.
Next, the oil is changed and the valve oil seal repair agent is added to solve the aging problem of the oil seal. Road test 30KM, the project is over.
Construction on October 8, 2019, running more than 1000 km, to November 5 back to the factory for inspection, oil level is normal, completely stopped burning oil. Report to the riders later.
To December 10, 2019, exactly 2 months after construction, check the oil ruler, oil scale in the middle position.
Construction mileage on Oct. 8, 2019, 138904KM.
To December 10, 2019, full 2 months after construction, mileage 144371KM, mileage after construction 144371-138904=5467KM. The oil level of the oil dipstick is normal and the construction is successful. Next, observe more mileage and report to the riders.
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