Part of the problem (fuel dilution, coolant leakage, excessive wear, etc.) of the engine during operation, will have a certain appearance of pollution and its impact on the lubrication system, and thus should send the engine is running, driving experience damage, fraudulent claims needs to be repaired, The causes of partial pollution and the effects on the lubrication system are summarized below:
First, moisture or coolant contamination
Pollution reasons:
1. The condensing action at low temperature: The cooling water temperature is too low, the crankcase ventilation is not smooth, the engine idle time is too long, frequent start and stop;
2, the piston seal is not good, the helium is serious: the piston ring or cylinder liner wears, the piston ring is bonded or damaged, the exhaust system is blocked;
3, cooler leakage: cylinder head cylinder liner seal, cylinder or cylinder head cracks;
Impact on lubricants and engine operation:
1, increase: low temperature sediment (oil sludge), oil emulsification, corrosion and corrosion;
2, reduce: Oil stability, oil clean dispersion;
Second, fuel dilution oil pollution
Pollution reasons:
1. Turbine oil: Rich mixture, throttle valve is not working properly, piston ring is bonded or damaged, carbon deposit of spark plug, ignition failure, large amount of helium;
2, Diesel engine oil has: The diesel circuit is blocked, the size of the injector becomes larger, the injector nozzle dripes, the atomization quality is not good, the exhaust system is blocked, and the piston ring is bonded or damaged;
Impact on lubricants and engine operation:
1, increase: engine wear, paint deposits;
2, reduce: viscosity, flash point, oil stability;
Third, dust sand particles of oil pollution
Pollution reasons:
1. Dust inhalation: The air filter has low efficiency, the air intake system leaks, and the crankcase breathing port has no filter;
2. Dirty motor oil or fuel: fuel pollution, low fuel filter efficiency, oil pollution, low oil filter efficiency;
Impact on lubricants and engine operation:
Increased: Abrasive wear, deposits, foaming of engine oil, blockage of air filter and fuel filter.
Fourth, metal crumbs on the oil pollution
Pollution reasons:
Excessive wear: Inhalation of dust, poor air filter maintenance, oil lubricity not suitable for engine requirements, low oil filter efficiency;
Impact on lubricants and engine operation:
Increased: Catalytic oxidation of oil, Formation of deposits, Abrasive wear, Bearing inserts.
V. Contamination of the oil from the haze carbonaceous material
Pollution reasons:
Diesel engine oil: The rich lean gas burns badly, supplies too much oil, the intake system is obstructed, the injector technology is in poor condition, and the helium gas is bad;
Impact on lubricants and engine operation:
Increase: Black oil color, viscosity change, sediment, oil filter plug;
Pollution reasons:
Oxidation of oil: Crankcase oil temperature is too high, the engine has a high temperature point, the cooling system is inefficient, the piston and cylinder liner temperature is too high, lean air mixture is working, ignition timing is not appropriate, and the amount of blow-by gas is bad.
Impact on lubricants and engine operation:
1, increase: paint deposits, bearing wear, viscosity, acid value;
2, reduce: oil stability, oil cleanliness;
VII. Clean Dispersion Disappearance of Pollution:
Pollution reasons:
Excessive water content in engine oil, severe radon, deeper oxidation of engine oil;
Impact on lubricants and engine operation:
Increase: engine deposits, wear;
The four misunderstandings in the use of lubricants cannot be excessively excessive
Misconception 1: Lubricants can be added more
The amount of lubricating oil should be controlled on the oil dipstick, and it is better between the lower reticle. Because too much lubricating oil will enter the combustion chamber from the gap between the cylinder and the piston and burn to form carbon deposits. These carbon deposits will increase the engine compression ratio. Increase the tendency to produce knocking; coke in the cylinder is red hot state also prone to cause premature combustion, such as falling into the cylinder will increase the cylinder and piston wear, but also speed up the pollution of lubricating oil. Second, too much increase in lubricating oil The crankshaft connecting rod's stirring resistance increases the fuel consumption.
Misunderstood 2: When the lubricating oil turns black, it is time to change the oil.
This understanding is not comprehensive. For lubricating oils that do not add a clear dispersant, the color blackening is indeed a sign that the oil has been severely deteriorated, but the lubricants used in Hyundai Motor are generally added with a clear decomposer. The agent removes the adhesive film and black coke adhering to the piston and disperses it in the oil to reduce the formation of high-temperature deposits in the engine. Therefore, after the lubricating oil is used for a period of time, the color tends to become black, but the oil is not Not completely deteriorated.
Misconception 3: Lubricants are often added without change
Regular inspection of the lubricating oil is correct, but only replenishing without replacement can only make up for the lack of oil, but it cannot fully compensate for the loss of lubricating oil performance. During the use of lubricating oil, the quality of the lubricating oil will gradually decline due to pollution, oxidation, etc. At the same time there will be some consumption, so that the number of reduction.
Misunderstanding 4: Large use of additives
A truly high-quality lubricant is a finished product with a variety of engine protection features. The formulation already contains a variety of additives, including anti-wear agents, and the balance of lubricants is the most careful formula to ensure full play of various properties. Add other additives by yourself Not only can it not bring additional protection to the vehicle, but it can easily react with the chemical substances in the engine oil, resulting in a decline in the overall performance of the engine oil.
