GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2003 🢒 Malibu 🢒 Engine 🢒 Engine Mechanical - 3.1L 🢒 Water Pump Replacement

Removal Procedure

    Object Number: 30978 Size: SH
  1. Drain the cooling system. Refer to Cooling System Draining and Filling .
  2. Loosen the water pump pulley bolts.
  3. Remove the drive belt. Refer to Drive Belt Replacement in Engine Mechanical - 3.1 L.

    4. Object Number: 30996 Size: SH
  4. Remove the water pump pulley bolts and pulley.
  5. Remove the water pump bolts, pump and gasket.
  6. Clean the water pump mating surfaces.

Installation Procedure

    Object Number: 26000 Size: SH
  1. Install the water pump gasket and pump (1).

    2. 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.

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


    Object Number: 30978 Size: SH
  3. Install the water pump pulley and bolt until snug.
  4. Install the drive belt. Refer to Drive Belt Replacement in Engine Mechanical - 3.1 L.
  5. Tighten the water pump pulley bolts.

    6. Tighten
    Tighten the water pump pully bolts to 25 N·m (18 lb ft).

  6. Fill the cooling system. Refer to Cooling System Draining and Filling .
  7. Inspect for leaks.