Where is Nazhijie u6pcv valve?

On (or near) the valve cover and the connected intake pipe.

Which belongs to a component of a crankcase forced ventilation system. Crankcase ventilation system is usually called "PCV system", "exhaust gas recirculation system" and so on. The basic installation position is on (or near) the valve cover and the connected intake pipe.

PCV valve consists of valve body, valve, bonnet and spring, which are inseparable. Its main function is to guide the gas in the crankcase into the intake manifold through the PCV valve, and a small amount of air directly enters the intake manifold from the air cleaner through the PCV valve, thus avoiding the phenomena of freezing at the throttle, insufficient combustion, and deterioration of emissions. Prevent blowby gas from entering the atmosphere, and at the same time prevent engine oil from deteriorating.