Infinity_QX4_1998-2003

Thermostat

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Removal & Installation



3.3L And 3.5L Engines
  1. Properly relieve the fuel system pressure, as outlined in the Fuel System Section.
  2.  
  3. Remove the undercover.
  4.  
  5. Remove the suspension member stay.
  6.  
  7. Drain the coolant from radiator.
  8.  
  9. Remove the engine cover.
  10.  
  11. Remove the air duct with air cleaner assembly.
  12.  
  13. Disconnect any necessary hoses and/or harnesses.
  14.  
  15. Remove the upper intake manifold corrector.
  16.  
  17. Remove the intake manifold corrector support bolts.
  18.  
  19. Remove the lower intake manifold corrector.
  20.  
  21. Disconnect injector harness connectors.
  22.  
  23. Remove the injector tube.
  24.  
  25. Remove the intake manifold.
  26.  
  27. Remove the water outlet housing and water control valve.
  28.  
  29. Installation is the reverse of the removal procedure. For installation, use a new gasket and tighten the retainers to the specifications shown in the accompanying illustration.

    Click image to see an enlarged view

    Fig. Exploded view of the thermostat (water control valve) and related components-3.3L and 3.5L engines

  30.  

 
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