Nissan Frontier, Xterra 1998-05

Removal & Installation

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3.3L Engine





Click image to see an enlarged view

Fig. Thermostat assembly and related components-3.3L engine


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. Drain the coolant. Properly disposed of used coolant.
  6.  
  7. Remove the upper and lower radiator hoses. Remove the fan shroud.
  8.  
  9. Remove the drive belts and the pulley bracket.
  10.  
  11. Remove the water inlet retaining bolts.
  12.  
  13. Remove the water inlet and the thermostat.
  14.  

To install:

  1. Installation is the reverse of the removal procedure.
  2.  
  3. Be sure to apply a continuous bead of the proper grade and type RTV sealant to the housing.
  4.  
  5. Install the thermostat with the jiggle valve or air bleeder at the upper side.

    Click image to see an enlarged view

    Fig. Thermostat jiggle valve/air bleeder location-3.3L engine

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

 
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