PCV Valve: Inspection: Inspection

INSPECT PCV VALVE
1. Install a clean hose to the PCV valve.
  
  Fig 1: Blowing Air Into Case Side
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Check the PCV valve operation.
  1. Blow air into the case side and check that air passes through easily.
    WARNING:
    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.
    
    Fig 2: Blowing Air Into Intake Manifold Side
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    If the result is not as specified, replace the PCV valve.
3. Remove the clean hose from the PCV valve.