Jul. 06, 2020
Different engines have normal oil consumption values, and different engine models have different normal oil consumption values. The following OEM Alloy steel crankshafts factory lists the reasons for the engine "burning" engine oil, used in automobile maintenance encountered "high oil consumption", "burning" engine oil problem how to solve.
What should I do if the engine burns oil?
1. External leakage of engine oil
There are many reasons for oil leakage, including oil lines, oil drains, oil pan gaskets, valve cover gaskets, oil pump gaskets, fuel pump gaskets, timing chain cover seals, and camshaft seals. The above possible leakage factors cannot be ignored, because even a small leakage will cause a large amount of oil consumption. For example, a drop every 6 seconds means that 0.56 liters of oil are consumed per 100 kilometers. The best leak detection method is to put a light-colored cloth on the bottom of the engine and check it after starting the engine. The location of the leak can be determined by the location of the oil droplets on the cloth.
2. Front and rear oil seal failure
Damage to the front and rear main bearing oil seals will definitely cause oil leakage. This situation can only be discovered when the engine is running under load. The main bearing oil seal must be replaced after it wears out, as it will cause a high amount of leakage, just like the external leakage of the engine oil.
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3. The main bearing is worn or faulty
Worn or faulty main bearings can throw up excessive oil and be thrown to the cylinder wall. As the bearing wear increases, more oil will be thrown away. For example, if the designed bearing clearance of 0.04 mm can provide normal lubrication and cooling functions, if the bearing clearance can be maintained, the amount of oil thrown out is normal, and the bearing will not be damaged. When the gap increases to 0,08 mm, the amount of oil thrown out will be five times the normal amount. If the gap increases to 0.16 mm, the amount of oil thrown out will be 25 times the normal amount. If too much oil is thrown away from the main bearing, more will be splashed on the cylinder, making the piston and piston ring unable to effectively control the oil. This can cause burning oil or carbon deposits on the piston and piston ring. Generally, if the engine oil is lost too much on the main bearing, the connecting rod bearing will be short of oil, resulting in insufficient oil splashing on the cylinder wall at certain low speeds, resulting in wear of the piston ring and piston, which cannot run at high speed in the engine Time control oil. Therefore, the consequence of main bearing wear is high oil consumption.
4. The connecting rod bearing is worn or damaged
The effect of connecting rod bearing clearance on engine oil is similar to the main bearing. In addition, the oil is more directly thrown onto the cylinder wall. Worn or damaged connecting rod bearings cause too much oil to be thrown onto the cylinder wall, resulting in the piston and piston ring designed to control the normal amount of oil cannot effectively control too much oil, so that excess oil enters the combustion chamber and is burned The oil consumption is high.
Note: Insufficient bearing clearance will not only cause self-wear, but also the wear of the piston, piston ring, and cylinder wall.
5. Camshaft bearings are worn or damaged
Camshaft bearings are usually pressure lubricated. If the clearance is too large, excess oil will leak. The leaked oil will soak the valve guide and valve stem, resulting in increased oil consumption.
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