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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1003 (Engine Cooling System) >> Repair Instructions >> Coolant Crossover Pipe Replacement (8.1L) >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Drain the cooling system. Refer to Draining and Filling Cooling System (without HP2) .
  2. Remove the drive belt tensioner. Refer to Drive Belt Tensioner Replacement - Accessory in Engine Mechanical - 8.1 L.
  3. Reposition the inlet hose clamp at the water crossover.
  4. Remove the inlet hose from the water crossover.
    5. Fig 1: View Of Inlet Hose Clamp & Water Crossover
    GM751425Courtesy of GENERAL MOTORS CORP.
  5. Reposition the heater inlet hose clamp at the water crossover.
  6. Remove the heater inlet hose from the water crossover.
    7. Fig 2: View Of Heater Inlet Hose & Water Crossover
    GM750694Courtesy of GENERAL MOTORS CORP.
  7. Reposition the bypass hose clamps at the water crossover and water pump.
  8. Remove the bypass hose.
    9. Fig 3: View Of Bypass Hose & Clamps
    GM846662Courtesy of GENERAL MOTORS CORP.
  9. Remove the generator. Refer to Generator Replacement (8.1L Engine) in Engine Electrical.
  10. Remove the power steering pump. Refer to Power Steering Pump Replacement (8.1L) in Power Steering System.
  11. Remove the generator bracket bolts and nut.
  12. Remove the generator bracket stud.
  13. Remove the generator bracket.
    14. Fig 4: View Of Generator Bracket, Bolts, Nuts & Stud
    GM751458Courtesy of GENERAL MOTORS CORP.
  14. Remove the water crossover bolts.
  15. Remove the water crossover.
  16. Remove and discard the water crossover gaskets.
    17. Fig 5: View Of Engine Coolant Crossover & Gasket
    GM470698Courtesy of GENERAL MOTORS CORP.
  17. If replacing the water crossover remove the following:
    1. Water outlet bolts (2)
    2. Water outlet (1)
    3. Thermostat (3)
    18. Fig 6: View Of Water Outlet, Bolts & Thermostat
    GM635643Courtesy of GENERAL MOTORS CORP.
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