PCV Valve: Inspection

WARNING: This page is about a different car, the 2008 Lexus IS 350. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT VENTILATION VALVE
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 Ventilation Valve Operation - Blow Air Into Cylinder Head Side
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    NOTE: 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.
3. Remove the clean hose from the ventilation valve.
  
  Fig 2: Checking Ventilation Valve Operation - Blow Air Into Intake Manifold Side
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002