Why does Wuling replace the PCV valve?
2 Answers
Wuling replaces the PCV valve to avoid phenomena such as icing at the throttle, incomplete combustion, and worsening emissions. Introduction to PCV: PCV is the abbreviation of the three English words Positive-Crankcase-Ventilation, which means the active ventilation control system of the crankcase (or oil pan) in Chinese. The PCV valve consists of a valve body, valve, valve cover, and spring, and cannot be disassembled. Its main functions are: To guide the gas in the crankcase into the intake manifold through the PCV valve, and a small amount of air enters the intake manifold directly from the air filter through the PCV valve. This avoids phenomena such as icing at the throttle, incomplete combustion, and worsening emissions. It prevents exhaust gases from entering the atmosphere and also prevents engine oil from deteriorating.
I've been driving the Wuling Hongguang for over two years for cargo hauling, and what I fear most is unexpected breakdowns on the road. Last time, the car idled so roughly it shook like a sieve. The mechanic checked and said the PCV valve was shot. This valve manages the engine's exhaust gas recirculation—when it clogs up, the crankcase pressure skyrockets. At best, it causes oil to splatter and contaminate the throttle body; at worst, it blows the oil seals and wrecks the engine. When my car was opened up, it was caked with sludge, and even the metal spring had rusted through. After replacing the valve, fuel consumption dropped from 8L back to 6L, and the exhaust stopped spewing blue smoke. The Wuling engine has a simple design, and since this valve is tucked deep inside, many owners never replace it until the car's scrapped. Actually, a quick check during maintenance can save thousands in major repairs—just a few dozen bucks for peace of mind. Worth it.
