Is It Normal for a China V Diesel Engine to Have Exhaust Dripping Water?
2 Answers
Exhaust dripping water in a China V diesel engine is abnormal. The reasons for water dripping from the exhaust pipe of a diesel engine include cracks in the cylinder, wear of the water sealing ring, and poor sealing. Cracks in the cylinder: Cracks in the cylinder block or cylinder liner allow cooling water to leak into the cylinder; Wear of the water sealing ring: Wear or breakage of the cylinder liner water sealing ring causes cooling water to leak into the oil pan; Poor sealing: For diesel engines stored outdoors in winter, failure to seal the ventilation system allows rain or snow to enter the cylinder and flow into the oil pan. The working principle of a diesel engine is: injecting diesel into the cylinder to mix with air, burning to convert thermal energy into mechanical energy in a heat engine, relying on the expansion of combustion gas to push the piston for linear motion, which rotates the crankshaft through the crank-connecting rod mechanism, thereby outputting mechanical work.
Driving a China V diesel vehicle for so many years, it's perfectly normal for the exhaust pipe to drip water. This water is mainly a result of the urea system (SCR) working, as injecting urea into the exhaust system to treat emissions produces water vapor. Especially during cold starts, temperature changes make it easier for water droplets to form. I've seen many vehicle owners rush to repair shops because of this, which is essentially a waste of money. Of course, it's important to note that if the water droplets appear blue or have a pungent odor, it might indicate urea leakage, and you should promptly check the injector and pipes. For regular maintenance, remember to replenish the urea solution in time to avoid system blockages.
