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: Checking PCV Valve Air Passes
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. Blow air into the intake manifold side, and check that air passes through with difficulty.
    
    Fig 2: Checking PCV Valve Air Passes With Difficulty
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    If the result is not as specified, replace the PCV valve sub-assembly.
3. Remove the hose from the PCV valve.