What Causes Oil Spray from the Exhaust Pipe?

[VeraLee]

Oil spray from the exhaust pipe indicates a malfunction in the vehicle. The specific reasons for oil spray from the exhaust pipe are analyzed as follows: 1. Aging of the crankcase ventilation valve: Failure of the piston, cylinder liner, piston pin, or piston ring results in the loss of their original sealing effect, leading to oil spray. 2. Severe wear between the valve stem and valve guide: Excessive wear between the valve stem and valve guide creates too large a gap, causing oil to leak downward. The damaged parts need to be identified and replaced. 3. Design defects in the vehicle model: The vehicle model may have inherent design flaws that cause oil spray from the exhaust pipe.