Infinity_QX56_2004-2005

Thermostat

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Removal & Installation




NOTE
Never remove the radiator cap when the engine is hot. Serious burns could occur from high-pressure engine coolant escaping from the radiator.

  1. Be sure the engine is cold.
  2.  
  3. Disconnect the negative battery cable.
  4.  
  5. Remove the air duct and resonator assembly.
  6.  
  7. Remove the engine front undercover.
  8.  
  9. Disconnect the water suction hose from the water inlet.
  10.  
  11. Remove the water inlet and thermostat.
  12.  

To install:

  1. Installation is the reverse of the removal procedure.
  2.  
  3. Be sure to use a new gasket.
  4.  
  5. Install the thermostat with the whole circumference of each flange part fitting securely inside the rubber ring, as shown in the illustration.

    Click image to see an enlarged view

    Fig. Thermostat alignment

  6.  
  7. Install the thermostat with the jiggle valve facing upward.
  8.  
  9. Be sure to refill the cooling using the proper grade and type engine coolant.
  10.  
  11. Start the engine and check for leaks.
  12.  
  13. Start the engine and allow it to reach operation temperature. Recheck the coolant level, fill as required.

    Click image to see an enlarged view

    Fig. Thermostat and related components

  14.  

 
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