What causes the exhaust pipe to spray engine oil?
2 Answers
The reasons for the exhaust pipe spraying engine oil: 1. Failure of the piston, cylinder liner, piston pin, or piston rings. The damaged parts need to be identified and replaced. 2. Severe wear between the valve stem and valve guide, or poor sealing, resulting in excessive clearance and oil leakage. 3. Some car models have inherent design defects that cause the exhaust pipe to drip oil. If the situation is not obvious, it generally does not cause significant impact. However, if the oil spraying is severe, it is abnormal and requires troubleshooting as described above.
I've been repairing cars for over a decade, and oil spraying from the exhaust pipe is something I've seen plenty of times. Usually, it's caused by internal engine issues. The most common culprits are worn piston rings allowing oil to leak into the combustion chamber and spray into the exhaust, or faulty valve seals failing to contain the oil. A malfunctioning turbocharger can also mix oil into the system. Don't underestimate this issue—oil spraying from the exhaust isn't just messy; it also pollutes the environment and increases fire risks. Check your oil level immediately; if it's excessive, drain some out. Regular maintenance is key—change the oil and inspect seals periodically, as prolonged engine use leads to wear and tear. If you spot a problem, don't keep driving—take it to a professional shop right away. Don't compromise safety for convenience.
