PCV Valve: Inspection

INSPECT VENTILATION VALVE SUB-ASSEMBLY
1. Install a clean hose to the ventilation valve sub-assembly.
2. Inspect the ventilation valve operation.
  1. Blow air into the cylinder block side, and check that air passes through easily.
    NOTE: Do not suck air through the valve. Petroleum substances inside the valve are hazardous to your health.
    
    Fig 1: Inspecting Ventilation Valve Operation - Blow Air Into Cylinder Block Side
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  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.
3. Remove the clean hose from the ventilation valve sub-assembly.
  
  Fig 2: Inspecting Ventilation Valve Operation - Blow Air Into Intake Manifold Side
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002