PCV Valve: Inspection

INSPECT VENTILATION VALVE SUB-ASSEMBLY
1. Check the operation.
  1. Install a clean hose.
  2. Blow air into the cylinder head side and check that the air passes through freely.
    CAUTION: Do not suck air through the ventilation valve. Petroleum substances inside the ventilation valve are harmful.
    
    Fig 1: Checking Air Passes Through Freely (Cylinder Head Side)
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. Blow air into the intake manifold side and check that the air does not pass through freely.
    If the operation is not as specified, replace the ventilation valve.
    
    Fig 2: Checking Air Does Not Pass Through Freely (Intake Manifold Side)
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002