Lexus GX470 2003-06

Removal & Installation

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  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
     
    Timing belt.
     
    No. 2 idler pulley
     
    Radiator hose
     
    Bypass hose
     
    Water inlet housing assembly
     
    Water pump
     

  6.  


    Click image to see an enlarged view

    Fig. Water inlet housing attaching bolts



    Click image to see an enlarged view

    Fig. Water pump mounting bolts, stud bolts and nut locations


To install:

  1. Install or connect the following:

    Water pump. Use a new gasket and tighten the bolts to 15 ft. lbs. (21 Nm). Tighten the stud bolt and nut to 13 ft. lbs. (18 Nm).
     
    Water inlet housing assembly. Use a new O-ring and apply sealant as shown. Tighten the bolts to 13 ft. lbs. (18 Nm).
     
    Bypass hose
     
    Radiator hose
     
    No. 2 idler pulley
     
    Timing belt
     
    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. Water inlet housing sealant application


  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
     
    Timing belt.
     
    No. 2 idler pulley
     
    Radiator hose
     
    Bypass hose
     
    Water inlet housing assembly
     
    Water pump
     

  6.  

To install:

  1. Install or connect the following:

    Water pump. Use a new gasket and tighten the bolts to 15 ft. lbs. (21 Nm). Tighten the stud bolt and nut to 13 ft. lbs. (18 Nm).
     
    Water inlet housing assembly. Use a new O-ring and apply sealant as shown. Tighten the bolts to 13 ft. lbs. (18 Nm).
     
    Bypass hose
     
    Radiator hose
     
    No. 2 idler pulley
     
    Timing belt
     
    Negative battery cable
     

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

 
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