GM Service Manual Online
For 1990-2009 cars only

Tools Required

J 38816-A Water Pump Remover/Installer


    Object Number: 639830  Size: SH
  1. Remove the heater inlet pipe fitting.

  2. Object Number: 522707  Size: SH
  3. Remove the engine coolant outlet fitting.
  4. Remove the rear lift bracket bolt.
  5. Remove the rear lift bracket.

  6. Object Number: 522706  Size: SH
  7. Remove the EVAP emission canister purge valve bolts.
  8. Remove the EVAP emission canister purge valve.

  9. Object Number: 522705  Size: SH
  10. Remove the EGR bracket shield nut.
  11. Remove the EGR bracket shield.

  12. Object Number: 522703  Size: SH
  13. Remove the EGR valve bolts.
  14. Remove the EGR valve.
  15. Remove the EGR gasket and discard.

  16. Object Number: 522701  Size: SH
  17. Remove the throttle body bolts.
  18. Remove the throttle body and plenum duct.
  19. Discard the plenum duct, do not reuse.

  20. Object Number: 522700  Size: SH
  21. Remove the accelerator control cable bracket bolts.
  22. Remove the accelerator control cable bracket.

  23. Object Number: 522699  Size: SH
  24. Remove the MAP sensor.

  25. Object Number: 522698  Size: SH
  26. Remove the water pump cover bolt and studs.
  27. Remove the water pump cover.

  28. Object Number: 522696  Size: SH
  29. Remove the water outlet bolts.
  30. Remove the water outlet and thermostat.
  31. Remove the water pump cover gasket.

  32. Object Number: 637030  Size: SH
  33. Remove the water pump and seal using the following procedure:
  34. 23.1. Index the J 38816-A socket into the water pump.
    23.2. Align the J 38816-A support plate on the water crossover.
    23.3. Install the J 38816-A support plate on the water crossover using the water pump cover bolts.
    23.4. Unlock the water pump from the water crossover by turning the J 38816-A socket clockwise.
    23.5. Remove the J 38816-A support plate from the water crossover.
    23.6. Remove the J 38816-A socket.
    23.7. Remove the water pump.
    23.8. Remove the water pump seal and discard.