Connecting Hoses & Pipes

All crankcase ventilation systems use connecting hoses and pipes to carry crankcase gases, engine vacuum and/or outside air. Hoses and pipes should be checked for clogging and leaks and replaced as necessary.

NOTE: Following figures are representative of typical crankcase ventilation systems for various manufacturers.

Fig 1: Crankcase Ventilation System (Gasoline Vehicles) I-Mark system uses no PCV valve. Courtesy of Isuzu Motor Co.

Fig 2: Crankcase Ventilation System (Diesel)

Courtesy of ISUZU MOTOR CO.