Question about 1999 Chevrolet Astro

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Can i print a diagram for removal of my waterpump

1999 CheverlotAstro

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  1. Before servicing the vehicle, refer to the Precautions Section.
  2. Disconnect the negative battery cable.
  3. Drain the engine cooling system.
  4. Remove or disconnect the following:
    NOTE On some engines, the pump retaining bolts will vary in size and thread. Be sure to note the positioning of all bolts during removal to assure proper installation.


    Air intake assembly Mass Air Flow (MAF) sensor Upper fan shroud Drive belt Fan and clutch assembly Water pump pulley using special tool J 41240 Coolant hoses Water pump
  5. Clean gasket mounting surface.

    can i print a diagram for removal of my waterpump - 0900c15280227aee.jpg enlarcan i print a diagram for removal of my waterpump - enlarge_tooltip.gifenlarge_tooltip.gif Fig. Recan i print a diagram for removal of my waterpump - 0900c15280227aef.jpgp pulley using special tool J-41240


    0900c15280227aef.jpg enlarge_icon.gifenlarge_tooltip.gif Fig. Water pump mounting-2002 shown

Posted on Jul 26, 2009

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Procedure on changing waterpump


  1. first drain the cooling system.
  2. loosen bolts on the waterpump pulley and remove the inner fender cover on the pass/side.
  3. remove the surpentine fan belt, note; make a diagram of the belt routing so belt will go back on the right way.
  4. remove the bolts you loosened on the pump pulley, use a pry bar to pry engine back to have enough room to remove the waterpump pulley.
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  6. remove the pump and clean old gasket off the block and install new pump,
  7. reverse to install new pump and fill system with coolant allow engine to run until thremostat opens,hope this is helpful. heres a few diagrams of the waterpump and the cover and the belt routing, good luck and hope this is helpful.
  8. e0c2b8f.png3e5449e.giff12ccdc.gif

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