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Eric
Eric, Automotive Repair Shop Manager
Category: Chevy
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Experience:  20+ yrs. experience as repair shop manager and technician.
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2003 chevy tahoe: step instructions on how to replace a water pump

This answer was rated:

I need step by step instructions on how to replace a water pump on a 2003 chevy tahoe.

Hi,

 

Below are directions :

 

Water Pump Replacement 4.8L, 5.3L, and 6.0L Engines

Removal Procedure


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  1. Drain the cooling system.
  2. Loosen the air cleaner outlet duct clamps at the following locations:
    • Throttle body
    • Mass airflow/intake air temperature (MAF/IAT) sensor
  3. Remove the radiator inlet hose clip from the outlet duct.
  4. Remove the air cleaner outlet duct.

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  5. If necessary, remove the engine sight shield. .
  6. Remove the radiator vent inlet hose from the radiator hose clips.

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  7. Reposition the inlet hose clamp at the water pump.
  8. Remove the inlet hose from the water pump.
  9. Remove the fan blade.
  10. Remove the accessory drive belt.

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  11. Reposition the outlet hose clamp at the water pump.
  12. Remove the outlet hose from the water pump.

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  13. Reposition the surge tank outlet hose clamp at the water pump.
  14. Remove the surge tank outlet hose from the water pump.

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  15. Reposition the heater inlet hose clamp at the water pump.
  16. Remove the heater inlet hose from the water pump.

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  17. Remove the water pump bolts.
  18. Remove the water pump and gaskets.
  19. Discard the water pump gaskets.

Important

All gaskets surfaces are to be free of oil or other foreign material during assembly.

 




  1. Install the water pump and NEW gaskets.

    Notice

    Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

     

  2. Install the water pump bolts. Tighten
    1. Tighten the water pump bolts a first pass to 15 N·m (11 lb ft).
    2. Tighten the water pump bolts a final pass to 30 N·m (22 lb ft).



  3. Install the heater inlet hose to the water pump.
  4. Position the heater inlet hose clamp at the water pump.


  5. Install the surge tank outlet hose to the water pump.
  6. Position the surge tank outlet hose clamp at the water pump.


  7. Install the outlet hose to the water pump.
  8. Position the outlet hose clamp at the water pump.
  9. Install the accessory drive belt.
  10. Install the fan blade.


  11. Install the inlet hose to the water pump.
  12. Position the inlet hose clamp at the water pump.


  13. Install the engine vent inlet hose to the radiator hose clips.
  14. If necessary, install the engine sight shield.


    Important

    Align the arrow at the throttle body end of the duct with the throttle body attaching stud.

     

  15. Install the air cleaner outlet duct.
  16. Install the radiator inlet hose clip to the outlet duct.
  17. Tighten the air cleaner outlet duct clamps at the following locations:
    • Throttle body
    • MAF/IAT sensor Tighten

      Tighten the air cleaner outlet duct clamp screws to 7 N·m (62 lb in).

  18. Fill the cooling system.
Customer: replied 7 years ago.
this is just what i needed. can you send me a diagram for the drive belt and will i need any special tools to accomplish this job?

Hi,

 

Serpentine belt:

 

The tensioner should be easy to move, Use a 15mm socket on the pulley bolt and you should beable to move and release the tensioner. If the pulley will not move, it might be frozen.

  1. Install a breaker bar with socket to the drive belt tensioner bolt.
  2. Rotate the drive belt tensioner clockwise in order to relieve tension on the belt.
  3. Remove the belt from the pulleys and the drive belt tensioner.
  4. Slowly release the tension on the drive belt tensioner.
  5. Remove the breaker bar and socket and from the drive belt tensioner bolt.
  6. Clean and inspect the belt surfaces of all the pulleys

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No special tools - just a full set of metric sockets and wrenches, from 8mm up to 17mm will get you through this.

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