Exhaust Emissions System - Crankcase Ventilation: Maintenance

Visually inspect crankcase ventilation hoses every 15, 000 miles. For proper operation of crankcase ventilation system and engine it is important that oil filler cap and all connections be tight, not allowing the intake of any additional air.

Fig 1: 911 Series Crankcase Ventilation System

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Fig 2: 924 Crankcase Ventilation System

Courtesy of PORSCHE CARS NORTH AMERICA, INC.