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Home >> Chevrolet >> 2002 >> Astro Van Passenger, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 798 (Engine Cooling System) >> Repair Instructions >> Water Pump Replacement >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2003 GMC Safari and 2003 Chevrolet Astro. However, it is still accessible from the selected car via links, so may be relevant.
  1. Install the coolant pump gaskets.
  2. Install the coolant pump.
    NOTE: Refer to FASTENER NOTICE in Cautions and Notices.
  3. Install the four bolts retaining the coolant pump.

    Tighten 

    Tighten the bolts to 45 N.m (33 lb ft).

    Fig 1: Installing Coolant Pump
    G01646433Courtesy of GENERAL MOTORS CORP.
  4. Connect the coolant bypass hose and clamps.
    Fig 2: Installing Coolant Bypass Hose
    G01646434Courtesy of GENERAL MOTORS CORP.
  5. Connect the radiator outlet hose to the coolant pump. Refer to RADIATOR HOSE REPLACEMENT - OUTLET .
  6. Install the coolant pump pulley and the bolts.

    Tighten 

    Tighten the coolant pump pulley bolts to 25 N.m (18 lb ft).

    Fig 3: Installing Coolant Pump Pulley Bolts And Pulley
    G01646435Courtesy of GENERAL MOTORS CORP.
  7. Install the fan and fan blade clutch assembly. Refer to FAN REPLACEMENT .
  8. Install the drive belt. Refer to Drive Belt Replacement in Engine Mechanical - 4.3L.
  9. Install the upper fan shroud and the bolts. Refer to FAN SHROUD REPLACEMENT - UPPER .
  10. Install the Mass Air Flow (MAF) sensor. Refer to ENGINE CONTROLS - REMOVAL & INSTALLATION in Engine Controls -4.3L.
  11. Install the air cleaner assembly. Refer to ENGINE CONTROLS - REMOVAL & INSTALLATION in Engine Controls - 4.3L.
  12. Refill the radiator with coolant. Refer to DRAINING AND FILLING COOLING SYSTEM .
  13. Start engine. After engine reaches normal operating temperature, check for coolant leaks.
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