Why does Wuling replace the PCV valve?

[MacJude]

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.

[AxelMarie]

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.

[VanCharlie]

Last month, I helped my uncle repair his Wuling Rongguang. The car's tachometer was jumping erratically at idle. I sprayed throttle cleaner on the throttle body, but it didn't help. After checking the wiring for a long time and finding no issues, I finally discovered that the PCV valve was completely stuck. The crankcase exhaust couldn't escape and was backing up into the intake pipe, disrupting the air-fuel mixture. The principle is similar to an anti-siphon valve on a faucet. Wuling vehicles often use a rubber diaphragm type, which can stick easily if the engine oil is dirty. When I removed the old valve, it wouldn't budge at all. After installing a new valve, the engine immediately ran smoothly. I recommend Wuling owners check this valve every 30,000 kilometers. Rubber components age quickly, and vehicles with poor-quality oil should replace it even more frequently.

[IsabelAnn]

Our repair shop handles over a dozen Wuling PCV valve replacements every month. When this valve gets clogged, the engine starts acting up: rough idling, skyrocketing fuel consumption, and rapid oil burning. Wuling engines deliver strong low-end torque but have average cooling performance. The high temperature in the crankcase causes the PCV valve rubber to deteriorate quickly. Just the other day, a "divine car" came in burning oil. Upon disassembly, we found the valve body cracked, sending exhaust gases straight into the intake manifold, which carbonized and seized the piston rings. A genuine replacement valve costs only 35 yuan, saving over 2,000 yuan compared to an engine overhaul. Remember, if you see blue smoke from the exhaust pipe, check this valve first!

[MayaLee]

Just had the 60,000 km maintenance done on my Wuling Hongguang V, and the mechanic said the PCV valve needs replacement. He explained that this valve acts like the engine's breathing valve—when clogged, it disrupts crankcase pressure balance, causing oil vapor to leak into the air filter and turbo. The old valve rattled when shaken, with its internal spring rusted and broken. After installing the new valve, the throttle feels more responsive, and the engine sounds much firmer at high speeds. A non-OEM part from the auto parts market costs just twenty bucks, but make sure it has an anti-counterfeit label—substandard valves that leak can cause more damage to the engine.