PCV Valve: Inspection

INSPECT VENTILATION VALVE SUB-ASSEMBLY
1. Install a clean hose to the ventilation valve.
2. Inspect operation of the ventilation valve.
  1. Blow air from the cylinder head side, and check that air passes through easily.
    CAUTION: Do not suck air through the valve.
    Petroleum substances remaining iside the valve are harmful.
    
    Fig 1: Checking Air Passes Through Easily
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. Blow air from the intake manifold side, and check that air passes through with difficulty. If the operation is not as specified, replace the ventilation valve.
    
    Fig 2: Checking Air Passes Through With Difficulty
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Remove the clean hose from ventilation valve.