Where is the crankcase ventilation valve located on the Passat Lingyu?

[DelEden]

Volkswagen Passat's crankcase ventilation valve is located below the intake manifold. Precautions for crankcase usage: If the crankcase ventilation check valve is damaged, it will cause increased pressure in the crankcase, excessive oil consumption, and affect exhaust emissions. Timely inspection and replacement are required if the crankcase ventilation valve is damaged or malfunctioning. Function of the crankcase: The crankcase is one of the most critical components in the engine. It bears the force transmitted from the connecting rod and converts it into torque output through the crankshaft to drive other engine accessories. The crankcase is subjected to centrifugal forces from rotating masses, periodically varying gas inertial forces, and reciprocating inertial forces, causing the crankshaft to endure bending and torsional loads. It also prevents oil deterioration and leakage from the crankshaft oil seals and crankcase gaskets.

[KeiraRose]

I previously checked this on my Passat Lingyu. The ventilation valve is located on the right rear side of the engine cover, just below the intake pipe. You need to lift the hood to find it; it's connected to a black hose leading to the air filter box. To replace it, you'll have to remove the engine cover—remember to turn off the engine and wait for it to cool down first. This part tends to cause issues in older cars. If the valve flap gets stuck or the hose cracks, the car may burn oil and emit blue smoke, with power becoming sluggish. During routine maintenance, ask the mechanic to check the seal of the ventilation valve connector gasket—if it loosens and leaks oil, it can be troublesome. You can remove it by gently prying open the clip with a screwdriver. If you're handy, it should take about half an hour to do it yourself.

[SadieAnn]

I've been repairing Volkswagen cars for over ten years. The Passat Lingyu PCV valve is located at the upper rear of the engine. You can locate the plastic valve body by following the pipe coming from the throttle body. There are typically two layouts: the older 1.8T version is mounted on the side of the camshaft cover, while the 2.0 version is hidden under the spark plug coils. When searching for it, pay attention to the pipe routing. If the hose is aged and feels stiff when pinched, it should be replaced. If the PCV valve gets clogged, the crankcase pressure rises, causing oil stains to spray out from the dipstick. In severe cases, the engine warning light will illuminate directly. The maintenance manual recommends inspection every 60,000 km. If you're doing it yourself, prepare a T25 Torx screwdriver and be careful not to damage the surrounding sensor wiring harnesses during disassembly.

[HaleyLynn]

I remember my first Passat had a PCV valve failure, and its location was quite easy to find. Open the hood, and you'll see a fist-sized plastic cylinder slightly to the right of the engine center—that's it, right next to the intake pipe behind the throttle body. For a DIY check, start the car and feel if the valve vibrates; no response might mean it's stuck. This part isn't expensive, but if it fails, engine oil consumption increases, and the exhaust emits a burnt smell. Getting it replaced at a repair shop costs around 200-300 yuan in labor.