Why does Haval H8 burn engine oil after less than 30,000 kilometers?

Front and rear oil seal failure

Damage to the front and rear main bearing oil seals will definitely lead to oil leakage. This situation can only be discovered when the engine is running under load. The main bearing oil seal must be replaced after wear, because like external leakage of engine oil, it will cause a high amount of leakage.

Weared or failed main bearings

Worn or failed main bearings can throw up excess oil and throw it against the cylinder walls. As bearing wear increases, more oil will be thrown up. For example, if the bearing design 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 out of the main bearing, more oil will be splashed on the cylinder, making the piston and piston rings unable to effectively control oil. This can lead to oil burning or carbon deposits on the pistons and piston rings. Usually, if too much engine oil is lost on the main bearing, the connecting rod bearing will be short of oil, resulting in insufficient oil splashing on the cylinder wall under certain low speed conditions, resulting in wear of the piston rings and pistons, making the engine unable to operate at high speeds. Timely oil control. Therefore, the consequence of main bearing wear is high oil consumption.