What is the reason for blue smoke coming from the exhaust pipe?

1 Answers
Anastasia
07/29/25 8:37pm
The reasons for blue smoke coming from the exhaust pipe are: 1. The turbocharger's lubricating oil return line has excessive back pressure. 2. Poor piston ring sealing; check the condition of the cylinder liner, piston, and piston rings. 3. Incorrect selection of engine oil viscosity. 4. Long-term incorrect driving habits or prolonged overloading. 5. Aging, wear, or damage to the valve oil seals, or excessive clearance between the valve and guide. Additional information: The exhaust pipe is part of the engine's exhaust system, which mainly includes the exhaust manifold, exhaust pipe, and muffler. The primary function of the exhaust pipe is to expel the waste gases produced by the engine after combustion.
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