1. Engine oil burning in cold car: When the car temperature is not completely raised, a large amount of blue smoke is emitted from the engine exhaust pipe, which is normal after hot car. This phenomenon is caused by the aging of the valve oil seal. Due to the temperature drop, the rigidity of rubber valve oil seal can not completely seal the valve oil seal, and the above phenomenon will occur after the oil leaks from the valve to the combustion chamber. Solution: Remove the engine cylinder head and replace the valve oil seal (please rest assured that this is a medium repair project. The maintenance time is about 4-5 hours. Costs range from 1200 yuan to 800 yuan, depending on the vehicle).
2. Hot car burning oil: after the car reaches normal temperature, the exhaust pipe still emits blue smoke, indicating that the piston ring is poorly sealed. Due to the poor sealing of the piston ring, engine oil directly rushed into the combustion chamber through the leakage of the piston ring under the action of the oil pump, and the exhaust pipe emitted blue smoke. There are several reasons for this phenomenon, such as material aging, carbon deposit stuck, excessive wear of cylinder liner and so on. Solution: According to the normal operation method, the engine needs to be hung down for maintenance. The maintenance time is about 2-4 days. The cost ranges from 5,000 yuan to 20,000 yuan, depending on the car, and the cost is mainly higher in terms of accessories.
There is another solution: if it is determined that the engine oil is burned by a hot car, and it is not serious (to be safe, you can test the cylinder pressure first), you can also directly remove the oil pan, directly take out the piston and replace the piston ring, so the cost and time are similar to the first solution.
You should always pay attention to the dipstick.
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