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Home >> Cadillac >> 2003 >> Seville SLS >> Repair and Diagnosis >> External Pages >> Different car >> Section 522 (Engine Cooling System) >> Repair Instructions >> Coolant Crossover Pipe Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2004 Cadillac Seville. 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 assembly. Refer to Air Cleaner Assembly Replacement in Engine Controls-4.6L.
  3. Remove the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement in Engine Mechanical-4.6L.
    4. Fig 1: Identifying Fuel regulator Vacuum Tube & AIR Solenoid Vacuum Tube
    GM490599Courtesy of GENERAL MOTORS CORP.
  4. Disconnect the brake booster vacuum tube from the water housing crossover.
  5. Disconnect the fuel regulator vacuum tube (1).
  6. Disconnect the AIR solenoid vacuum tube (2).
  7. Remove the throttle body. Refer to Throttle Body Assembly Replacement in Engine Controls-4.6L.
    8. Fig 2: Identifying Fuel Rail Bracket Retaining Nut
    GM527521Courtesy of GENERAL MOTORS CORP.
  8. Disconnect the fuel rail bracket retaining nut at the rear lift bracket.
  9. Disconnect the surge tank inlet hose from the fitting.
    10. Fig 3: Identifying Surge Tank Inlet Fitting
    GM522707Courtesy of GENERAL MOTORS CORP.
  10. Remove the surge tank inlet fitting.
  11. Remove the rear lift bracket bolt.
  12. Remove the rear lift bracket.
  13. Remove the EGR valve. Refer to Exhaust Gas Recirculation (EGR) Valve Replacement in Engine Controls-4.6L.
    14. Fig 4: EGR Inlet Tube
    GM651462Courtesy of GENERAL MOTORS CORP.
  14. Disconnect the EGR inlet pipe nut (1) from the exhaust crossover.
    15. 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.
  15. Remove the EGR inlet pipe bolt (2) and flange (3) from the water crossover.
  16. Remove the EGR inlet pipe and discard.
    17. Fig 5: View of MAP Sensor
    GM522699Courtesy of GENERAL MOTORS CORP.
  17. Disconnect the electrical connector from the MAP sensor.
  18. Remove the MAP sensor.
    19. Fig 6: Removing Hose Clamp
    GM518338Courtesy of GENERAL MOTORS CORP.
  19. Position the J 38185  (2) to the clamp in order to remove the inlet radiator hose (1) from the water housing crossover.
    20. Fig 7: View Of Front Of Engine Compartment
    GM518337Courtesy of GENERAL MOTORS CORP.
  20. Position the J 38185  to the clamp in order to remove the outlet radiator hose (2) from the thermostat housing.
  21. Remove the water pump. Refer to Water Pump Replacement .
    22. Fig 8: Identifying Water Pump Belt Tensioner to Water Crossover Bolts
    GM500274Courtesy of GENERAL MOTORS CORP.
  22. Remove the 2 bolts (3) attaching the water pump belt tensioner (1) to the water crossover.
  23. Remove the water pump belt tensioner (1).
    24. Fig 9: View of Water Housing Crossover to Engine Connectors
    GM550506Courtesy of GENERAL MOTORS CORP.
  24. Disconnect the cable harness clip at the water housing crossover and position aside.
  25. Disconnect the heater hose from the water housing crossover.
  26. Remove the water housing crossover from the engine.
  27. Clean and inspect the water housing crossover. Refer to Water Crossover Cleaning and Inspection in Engine Mechanical.
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