PCV Valve: Inspection

INSPECT PCV VALVE SUB-ASSEMBLY
1. Install a clean hose to the PCV valve.
2. Check the PCV valve operation.
  1. Blow air into the cylinder head side, and check that air passes through easily.
    CAUTION: Do not suck air through the valve. Petroleum substances inside the valve are hazardous to your health.
    
    Fig 1: Blowing Air Into Cylinder Head 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 PCV valve sub-assembly.
    
    Fig 2: Blowing Air Into Intake Manifold Side
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Remove the hose from the PCV valve.