1. The joint part of the body is not tightly sealed, and the lubrication system leaks oil. Remedy: According to the location of oil leakage, replace various gaskets or oil seals to ensure their tightness.
2. The oil level of the oil pan is too high. At this time, excess lubricating oil will be brought into the combustion chamber to be burned, resulting in excessive oil consumption. Remedy: The excess lubricating oil should be released to keep the oil storage within the standard range.
3. Turbocharger problem. The oil seal between the turbocharger and the intake pipe is damaged, causing oil burn. The main reason is that the oil replacement cycle is too long or the use of inferior oil results in the lack of lubrication and heat dissipation of the floating turbine main shaft, which in turn damages the oil seal and causes oil leakage. Remedy: replace the oil seal and use high-quality engine oil.
4. The piston ring is damaged, stuck or broken, and cannot scrape oil. Under normal circumstances, the oil splashed by the crankshaft to lubricate the inner wall of the cylinder is often scraped off by the piston ring and flows back to the oil pan. When the piston ring is worn, stuck or broken, the oil scraping performance is reduced or does not have the function of scraping oil, so that the oil enters the combustion chamber and burns, resulting in an increase in oil consumption. Remedy: Replace all piston rings with new ones.
5. The piston rings are opposite to each other, the opening gap is too large, and the side gap increases, resulting in the phenomenon of pumping oil. When the piston rings are opposite to each other, not only the power is reduced, but also the lubricating oil can enter the combustion chamber through the opening of the opposite piston ring for combustion. When the piston ring is open, the end face and the groove of the piston ring are worn, and the oil will be pumped into the cylinder through the piston rings one by one for combustion, resulting in excessive oil consumption. Remedy: If the piston rings are opposite to each other, the openings of the adjacent rings can be adjusted to form a 120-degree angle with each other, and the openings cannot be aligned with the fuel injection direction and cannot be at the position of the piston tip; if the piston ring and the piston ring groove are worn, the piston and piston ring Piston Rings.
6. The cylinder liner is worn, and the gap between the piston and the cylinder is too large, so that the cylinder liner and the piston ring do not cooperate well, resulting in excessive oil consumption. When the overall wear or partial wear of the cylinder liner makes the gap between it and the piston too large, the piston ring and the cylinder liner cannot cooperate well, resulting in a decrease in oil scraping performance, and even some parts cannot fit the scraping oil, causing the oil to burn. Excessive consumption. Remedy: replace the matching piston and piston ring with the lined cylinder, or directly replace the new cylinder liner.
7. The conical surface of the piston ring is installed reversely, and the torsion ring is installed wrongly. When the conical surface of the piston ring is reversely installed and the twisting ring of the combined ring is installed incorrectly, not only can the oil on the cylinder liner not be scraped into the oil pan, but it will be scraped into the combustion chamber for combustion, increasing the consumption of oil. Remedy: Install various piston rings as required.
8. The valve guide is worn and the clearance is too large. When the valve guide is worn, the oil used to lubricate the rocker arm and the valve will enter the cylinder through the excessive gap between the valve guide and the valve stem, resulting in increased oil consumption. Remedy: Replace the valve guide.