What to Do When Blue Smoke Appears After Cold Start?

[LeilaLynn]

Blue smoke appearing during cold start indicates that the engine is burning oil. It is recommended to visit a 4S shop for inspection and repair. Below are the relevant explanations: 1. Aging valve oil seal: Damage or wear, excessive clearance between the valve and guide. The crankcase forced ventilation valve (PCV) is clogged or damaged. This causes exhaust gases to be trapped inside the engine, increasing crankcase pressure, which leads to some oil entering the combustion chamber and participating in combustion. 2. Internal engine wear: Such as excessive wear between the piston and cylinder wall due to prolonged use or improper maintenance, allowing oil to enter the cylinder and participate in combustion. Piston ring misalignment, excessive end or side clearance, sticking, or severe wear of piston rings, etc.