Nissan Frontier, Xterra 1998-05

Removal & Installation

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2.4L Engine





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Fig. Water pump assembly-2.4L engine

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Drain the cooling system.
  4.  
  5. Remove or disconnect the following:

    Negative battery cable
     
    Accessory drive belts
     
    Cooling fan
     
    Water pump
     

  6.  

To install:

  1. Install or connect the following:

    Water pump. Apply sealant and tighten the bolts to 12-15 ft. lbs. (16-21 Nm).
     
    Cooling fan
     
    Accessory drive belts
     
    Negative battery cable
     

  2.  
  3. Fill the cooling system.
  4.  
  5. Start the engine and check for leaks.
  6.  


    Click image to see an enlarged view

    Fig. Liquid gasket application-2.4L engine




Click image to see an enlarged view

Fig. Water pump assembly-2.4L engine

  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2.  
  3. Drain the cooling system.
  4.  
  5. Remove or disconnect the following:

    Negative battery cable
     
    Accessory drive belts
     
    Cooling fan
     
    Water pump
     

  6.  

To install:

  1. Install or connect the following:

    Water pump. Apply sealant and tighten the bolts to 12-15 ft. lbs. (16-21 Nm).
     
    Cooling fan
     
    Accessory drive belts
     
    Negative battery cable
     

  2.  
  3. Fill the cooling system.
  4.  
  5. Start the engine and check for leaks.

    Click image to see an enlarged view

    Fig. Liquid gasket application-2.4L engine

  6.  



Click image to see an enlarged view

Fig. Water pump assembly-2.4L engine

  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2.  
  3. Drain the cooling system.
  4.  
  5. Remove or disconnect the following:

    Negative battery cable
     
    Accessory drive belts
     
    Cooling fan
     
    Water pump
     

  6.  

To install:

  1. Install or connect the following:

    Water pump. Apply sealant and tighten the bolts to 12-15 ft. lbs. (16-21 Nm).
     
    Cooling fan
     
    Accessory drive belts
     
    Negative battery cable
     

  2.  
  3. Fill the cooling system.
  4.  
  5. Start the engine and check for leaks.

    Click image to see an enlarged view

    Fig. Liquid gasket application-2.4L engine

  6.  



Click image to see an enlarged view

Fig. Water pump-2.4L engine

  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Drain the cooling system.
  4.  
  5. Remove or disconnect the following:

    Negative battery cable
     
    Accessory drive belts
     
    Cooling fan
     
    Water pump
     

  6.  

To install:

  1. Install or connect the following:

    Water pump. Apply sealant and tighten the bolts to 12-15 ft. lbs. (16-21 Nm).
     
    Cooling fan
     
    Accessory drive belts
     
    Negative battery cable
     

  2.  
  3. Fill the cooling system.
  4.  
  5. Start the engine and check for leaks.

    Click image to see an enlarged view

    Fig. Liquid gasket application-2.4L engine

  6.  

2.5L Engine





Click image to see an enlarged view

Fig. Water pump and related components-2.5L engine

  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Disconnect the negative battery cable. Drain the cooling system.
  4.  
  5. Remove the air duct. Remove the drive belt.
  6.  
  7. Remove the upper and lower radiator hoses.
  8.  
  9. Remove the cooling fan and the water pump pulley.
  10.  
  11. Remove the water pump retaining bolts. Remove the water pump from the engine.
  12.  

To install:

  1. Installation is the reverse of the removal procedure.
  2.  
  3. Be sure to use new gaskets and O-rings, as required.
  4.  
  5. Be sure to fill the cooling system with the proper grade and type engine coolant.
  6.  
  7. Start the engine and check for leaks.
  8.  

4.0L Engine





Click image to see an enlarged view

Fig. Water pump and related components-4.0L engine

  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Disconnect the negative battery cable. Drain the cooling system.
  4.  
  5. Remove the undercover. Remove the drive belts.
  6.  
  7. Remove the radiator upper and lower hoses. Remove the cooling fan.
  8.  
  9. Remove the chain tensioner cover and water pump cover from the front timing case, using tool KV10111100 (J-37228) or equivalent.
  10.  
  11. To remove the timing chain tensioner (primary), loosen the clip of the timing chain tensioner (primary) and release the plunger stopper. Insert the plunger into the tensioner body by pressing the slack guide. Keep the slack guide pressed and hold the plunger in by pushing the stopper pin through the tensioner body hole and plunger groove. Turn the crankshaft pulley clockwise so that the timing chain on the timing chain tensioner (primary) side is loose. Remove the bolts and remove the timing chain tensioner (primary).
    NOTE
    Be careful not to drop the bolts inside the timing chain case.



    Click image to see an enlarged view

    Fig. Chain tensioner (primary) cover removal-4.0L engine

  12.  
  13. Remove the three water pump retaining bolts. Secure a gap between the water pump gear and the timing chain, by turning the crankshaft pulley counterclockwise until timing chain looseness on the water pump sprocket is at its maximum point.
  14.  
  15. Screw M8 bolts approximately 1.97 inch in length into the water pumps upper and lower bolt holes until they reach the timing chain case.
  16.  
  17. Alternately tighten each bolt for a half turn and pull out the water pump.
    NOTE
    Pull the pump straight out while preventing the vane from contacting the socket in the installation area. Remove the pump without causing the sprocket to contact the timing chain.

  18.  
  19. Remove the M8 bolts. Remove and discard the O-rings.
  20.  

To install:

  1. Installation is the reverse of the removal procedure.
  2.  
  3. Be sure to use new gaskets and O-rings, as required.
  4.  
  5. When installing the water pump make sure that the timing chain and water pump sprocket are engaged. Tighten the bolts alternately and evenly to specification.
  6.  
  7. Before installing the chain tensioner cover and the water pump cover be sure to apply a continuous bead of sealant to the mating surfaces of the covers.
    NOTE
    Do not allow the sealant to set for more than five minutes before installing the covers.

  8.  
  9. Be sure to fill the cooling system with the proper grade and type engine coolant.
  10.  
  11. Start the engine and check for leaks.
  12.  
  13. Let the engine idle for about three minutes than rev it up to 3,000 rpm-s under a no load condition to purge air from the high pressure chamber of the chain tensioner. The engine may produce a rattling noise. This indicates that air still remains in the chamber and is not a matter of concern.
  14.  

 
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