GM Service Manual Online
For 1990-2009 cars only

Tools Required

J 39914 Serpentine Belt Tensioner Unloader

Removal Procedure

  1. Drain the cooling system until the coolant is below the level of the water pump. Refer to Cooling System Draining and Filling .

  2. Object Number: 1309849  Size: SH
  3. Loosen the water pump pulley bolts (4).
  4. Using the J 39914 rotate the drive belt tensioner (8) to release the tension on the drive belt.
  5. Remove the drive belt from the right idler pulley (2).
  6. Carefully release the J 39914 to relieve the drive belt tensioner spring tension.
  7. Remove the J 39914 from the drive belt tensioner (8).

  8. Object Number: 1087353  Size: SH
  9. Remove the water pump pulley bolts (2).
  10. Remove the water pump pulley (1).

  11. Object Number: 1087356  Size: SH
  12. Remove the water pump bolts (3).
  13. Remove the water pump (1).
  14. Remove the water pump gasket (2).
  15. Clean the water pump mating surfaces.

Installation Procedure


    Object Number: 1087356  Size: SH
  1. Install the water pump gasket (2).
  2. Install the water pump (1).
  3. Notice: Refer to Fastener Notice in the Preface section.

  4. Install the water pump bolts (3).
  5. Tighten
    Tighten the bolts to 10 N·m (89 lb in).


    Object Number: 1087353  Size: SH
  6. Install the water pump pulley (1). Loosely install the pulley bolts (2).

  7. Object Number: 1309849  Size: SH
  8. Insure the drive belt is properly centered on all the pulleys except the right idler puller (3).
  9. Using the J 39914 rotate the drive belt tensioner away from the drive belt.
  10. Install the drive belt to the right idler pulley (2).
  11. Carefully release the J 39914 allowing the drive belt tensioner (8) to come in contact with the drive belt.
  12. Remove the J 39914 from the drive belt tensioner (8).
  13. Inspect the drive belt to insure the belt is properly centered on all the pulleys (1-8).
  14. Tighten the water pump pulley bolts.
  15. Tighten
    Tighten the bolts to 25 N·m (18 lb ft).

  16. Fill the cooling system. Refer to Cooling System Draining and Filling .
  17. Inspect the cooling system for leaks.