Crankcase Ventilation Systems: Maintenance

Complete system, including hoses, should be checked for deterioration, leakage, or clogging. Clean flame guard, PCV valve, oil filter cap, and nipple every 60, 000 miles. Replace components as necessary.

Fig 1: Crankcase Ventilation System

Courtesy of VOLVO CARS CORPORATION

4 cylinder models, except Turbo. 

Fig 2: Crankcase Ventilation System

Courtesy of VOLVO CARS CORPORATION

V6 models.