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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 641 (Engine Cooling System) >> Repair Instructions >> Water Crossover Replacement (LX5) >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2002 Oldsmobile Aurora and 2001 Oldsmobile Aurora. 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 .
  2. Remove the air cleaner inlet duct. .
  3. Remove the throttle body. Refer to THROTTLE BODY .
  4. Disconnect the right exhaust manifold and position aside. Refer to EXHAUST MANIFOLD REPLACEMENT - RIGHT (LX5) or EXHAUST MANIFOLD REPLACEMENT - RIGHT (L47) .
  5. Disconnect the inlet radiator hose (2) from the water housing crossover.
    Fig 1: Disconnecting Inlet Radiator Hose
    G01817533Courtesy of GENERAL MOTORS CORP.
  6. Disconnect the heater inlet hose from the water crossover.
    Fig 2: Disconnecting Heater Inlet Hose
    G01817534Courtesy of GENERAL MOTORS CORP.
  7. Disconnect the EGR inlet pipe nut (3) from the exhaust crossover.

    Important:  The EGR valve inlet pipe incorporates a crush seal connection at the water crossover. The EGR valve inlet pipe must be replaced if disconnected from the water crossover.

  8. Remove the EGR inlet pipe bolt (2) from the water crossover.
  9. Remove the EGR inlet pipe (1) and discard.
    Fig 3: Removing EGR Inlet Pipe
    G01817535Courtesy of GENERAL MOTORS CORP.

    Important:  The EGR valve outlet pipe incorporates a crush seal connection at the water crossover. The EGR valve outlet pipe must be replaced if disconnected from the water crossover.

  10. Remove the EGR valve outlet pipe bolts from the intake manifold and the water crossover.
  11. Remove the EGR outlet pipe and discard.
  12. Remove the EGR heat shield and EGR valve. Refer to EGR VALVE .
    Fig 4: Removing EGR Valve Outlet Pipe
    G01817536Courtesy of GENERAL MOTORS CORP.
  13. Remove the water housing crossover bolts (1-6).
    Fig 5: Removing Water Housing Crossover Bolts
    G01817537Courtesy of GENERAL MOTORS CORP.
  14. Remove the water housing crossover from the engine.
  15. Discard the water crossover gaskets.
  16. Clean and inspect the water housing crossover. Refer to WATER CROSSOVER CLEANING AND INSPECTION .
    Fig 6: Removing Water Housing Crossover
    G01817538Courtesy of GENERAL MOTORS CORP.
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