What Causes Engine Oil to Spray from the Exhaust Pipe?
2 Answers
Engine oil spraying from the exhaust pipe can be caused by: 1. Aging of the crankcase ventilation valve; 2. Faults in the piston, cylinder liner, piston pin, or piston rings; 3. Wear between the valve stem and valve guide; 4. Excessive crankcase pressure; 5. Blockage of the crankcase breather; 6. Cylinder blow-by. An engine is a machine that converts other forms of energy into mechanical energy. The solutions for engine oil spraying from the exhaust pipe include: 1. Replacing the crankcase ventilation valve, piston, cylinder liner, piston pin, and piston rings; 2. Adjusting the clearance between the valve stem and valve guide; 3. Regulating the crankcase pressure; 4. Cleaning the crankcase breather.
I've noticed that engine oil spraying from the exhaust pipe is quite common. The main reasons include worn piston rings allowing oil to enter the combustion chamber, which is then carried out by the exhaust pipe. Additionally, when valve stem seals age or become damaged, leaking oil can mix with exhaust gases and be ejected. Furthermore, if the PCV ventilation system is stuck or clogged, excessive crankcase pressure can force oil to overflow. Long-term neglect of this issue is very dangerous, as it can increase exhaust pollution and even cause fires. It is recommended to stop the vehicle immediately upon discovery and check the oil level. If it's too low, it indicates severe internal leakage, and professional repair shop inspection is necessary to replace worn components or clean ventilation lines to prevent further deterioration of the fault.
