Protege 1999-2000

Positive Crankcase Ventilation System

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PCV Valve



Operation

Specific to:

Mazda Protege 1999-2003

Mazda Protege5 2002-2003

The PCV valve regulates the amount of ventilating air and blow-by gas to the intake manifold and prevents backfire from traveling into the crankcase.

Removal & Installation

Specific to:

Mazda Protege 1999-2003

Mazda Protege5 2002-2003

  1. Detach the PCV hose from the PCV valve.
  2.  
  3. Pull the PCV valve from the grommet in the valve cover.
  4.  
  5. Installation is the reverse of the removal procedure.
  6.  

Testing

Specific to:

Mazda Protege 1999-2003

Mazda Protege5 2002-2003

  1. Remove the PCV valve.
  2.  
  3. Blow through the valve and verify that air flows:
    1. Air applied to port A, air should flow from port B
    2.  
    3. Air applied to port B, air should NOT flow from port A
    4.  
    5. If not as specified, replace the PCV valve.

      Click image to see an enlarged view

      Fig. Identifying PCV valve ports for air flow test

    6.  

  4.  

 
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