PCV Valve: Inspection

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