Positive Crankcase Ventilation

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2018 Porsche Cayenne, 2017 Porsche Cayenne, 2016 Porsche Cayenne, 2015 Porsche Cayenne, and 2014 Porsche Cayenne. However, it is still accessible from the selected car via links, so may be relevant.

Positive crankcase ventilation valve → Tightening torque: 10 Nm (7.5 ftlb.)
Positive crankcase ventilation line
O-ring, 22.5 x 2.5 FPM
O-ring, 22.5 x 2.5 HNBR
Aluminum screw, M6 x 16 → Initial tightening: 4 Nm (3 ftlb.) → Final tightening: 90°
Holder

Fig 1: Identifying Positive Crankcase Ventilation Valve And O-Ring

Courtesy of PORSCHE CARS NORTH AMERICA, INC.