Ventilation Valve: Inspection

INSPECT VENTILATION VALVE SUB-ASSEMBLY
1. Install a clean hose to the ventilation valve.
  
  Fig 1: Removing Ventilation Valve
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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 inside the valve are harmful.
    
    Fig 2: Inspecting Ventilation Valve
    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.
3. Remove the clean hose from the ventilation valve.
  
  Fig 3: Blowing Air From Intake Manifold Side
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002