Oil leakage from Buick LaCrosse waste gas valve.

The Buick LaCrosse waste gas valve leaks oil. The reason for the oil leakage of Buick LaCrosse waste gas valve is that the piston assembly in the engine is not tightly sealed, which leads to the leakage of compressed gas in the combustion chamber along the cylinder wall, which will cause the pressure in the engine crankcase to increase, and the increased pressure will be discharged with oil when it is discharged through the waste gas pipe. The wear between the valve stem and the valve guide is serious, resulting in excessive clearance and oil leakage. Buick is an automobile brand sold by General Motors in the United States, Canada and China. It is sold in North America, China, CIS countries and the Middle East.