Positive Crankcase Ventilation: Description and Operation

911 Carrera S (997) Crankcase Ventilation

The crankcase ventilation system and oil spray collector have been revised to take account of the increased requirements of the 3.8 liter engine. The ability of the system to remove engine oil from the crankcase vapors has been improved. The cleaned ventilation gases are then routed behind the throttle to the intake system.