1, due to the aging of the valve oil seal, the rubber loses its elasticity and the seal is not tight, and the oil penetrates into the combustion chamber and burns, thus being consumed. The phenomenon is that the first motor starts in the morning, and there is a blue smoke, which disappears quickly after the car is hot.
2. Due to cylinder wear or insufficient piston ring tension, piston ring alignment and other reasons, blue smoke appears in both cold and hot cars above 3000 rpm, and the amount of blue smoke depends on the degree of wear.
3. It is recommended to check and repair, not necessarily overhaul. If the cylinder liner is not seriously worn, just replace the piston ring and valve oil seal.