Astro, Safari 1997-2005

Removal & Installation

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The procedure described is for the standard valve, other variations are similar.

  1. Remove the air cleaner.
  2.  
  3. Remove the upper fan shroud.
  4.  
  5. Drain the engine coolant.
  6.  
  7. Disconnect the vacuum hose from the heater water control valve.
  8.  
  9. Using the hose clamp pliers, reposition the heater inlet pipe (5) clamp from the heater water control valve.
  10.  
  11. Remove the heater inlet pipe from the heater water control valve.
  12.  
  13. Using the hose clamp pliers, reposition the heater outlet pipe (6) clamp from the heater water control valve.
  14.  
  15. Remove the heater outlet pipe from the heater water control valve.
  16.  
  17. Using the hose clamp pliers, reposition the heater inlet hose clamp from the heater water control valve.
  18.  
  19. Remove the heater inlet hose from the heater water control valve.
  20.  
  21. Using the hose clamp pliers, reposition the heater outlet hose clamp from the heater water control valve.
  22.  
  23. Remove the heater outlet hose from the heater water control valve.
  24.  
  25. Remove the bolt (3) that retains the heater water control valve (4) to the heater assembly.
  26.  
  27. Remove the heater water control valve.

    Click image to see an enlarged view

    Fig. View of water heater control valve

  28.  

To install:

  1. Install the heater water control valve (4) to the heater assembly.
  2.  
  3. Install the bolt (3) that retains the heater water control valve to the heater assembly.
    1. Tighten the bolt to 35 inch lbs (4 Nm).
    2.  

  4.  
  5. Install the heater outlet hose to the heater water control valve.
  6.  
  7. Using the hose clamp pliers, reposition the heater outlet hose clamp to the heater water control valve.
  8.  
  9. Install the heater inlet hose to the heater water control valve.
  10.  
  11. Using the hose clamp pliers, reposition the heater inlet hose clamp to the heater water control valve.
  12.  
  13. Install the heater outlet pipe to the heater water control valve.
  14.  
  15. Using the hose clamp pliers, reposition the heater inlet pipe (5) clamp to the heater water control valve.
  16.  
  17. Install the heater inlet pipe to the heater water control valve.
  18.  
  19. Using the hose clamp pliers, reposition the heater outlet pipe (6) clamp to the heater water control valve.
  20.  
  21. Connect the vacuum hose to the heater water control valve.
  22.  
  23. Fill the cooling system.
  24.  
  25. Install the upper fan shroud.
  26.  
  27. Install the air cleaner.
  28.  

 
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