I30 1996-1997

Positive Crankcase Ventilation System

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Description & Operation



Specific to:

Infiniti G20 2000-2002

Infiniti G35 2003-2005

Infiniti I30 1996-2001

Infiniti I35 2002-2004

Infiniti M45 2003-2004

Infiniti Q45 1996-2005

The PCV system consists of the breather tube and the PCV valve. The breather tube connects the crankcase to a contained fresh air source such as the air cleaner. Air passes into this tube and into the engine after being filtered through a spark arrestor screen in order to prevent a the possibility of an explosion within the engine in the case of a backfire.

PCV Valve



Removal & Installation

The Positive Crankcase Ventilation (PCV) valve is located on the valve cover. To see another view the PCV valve location, refer to Engine Performance & Emission Controls, Component Locations.

The manufacturer does not provide a specific removal and installation procedure for this component. Use the illustration as a guide when servicing this component.

Click image to see an enlarged view

Fig. Positive Crankcase Ventilation (PCV) valve location-I30

Testing



Specific to:

Infiniti G20 1996, 1999-2002

Infiniti G35 2003-2005

Infiniti I30 1996-2001

Infiniti I35 2002-2004

Infiniti M45 2003-2004

Infiniti Q45 1998-2005

  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Start the engine and allow it to reach operating temperature.
  4.  
  5. Allow the engine idle to stabilize.
  6.  
  7. Pinch the hose or hold a finger over the PCV valve, if applicable. Typically, the engine RPM should drop around 50 RPM.
  8.  
  9. Check the PCV valve for excessive oil, carbon, or deposit build-up.
  10.  
  11. Check the hose or line for restriction/blockage.
  12.  
  13. Check for missing O-rings and for proper installation.
  14.  
  15. If the PCV valve is in question, replace the valve.
  16.  

 
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