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Home >> Cadillac >> 2004 >> CTS Base, 3.6 7 >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 7 (Engine Mechanical - 3.2L) >> Repair Instructions >> On-Vehicle Repair Instructions >> Intake Manifold Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different variant/trim than selected.
  1. Remove the intake plenum. Refer to Intake Plenum Replacement .
  2. Relieve the fuel system pressure. Refer to Fuel Pressure Relief Procedure in Engine Controls-2.6L and 3.2L.
    3. Fig 1: Locating Fuel Rail Quick Connect Fittings
    GM785815Courtesy of GENERAL MOTORS CORP.
  3. Refer to Quick Connect Fitting(s) Service (Metal Collar) in order to disconnect the following quick connect fittings from the fuel rail:
    • The return hose/pipe (1)
    • The feed hose/pipe (2)

      Plug the open outlet ports to prevent fuel loss and contamination.

    4. Fig 2: Identifying Electrical Connectors
    GM785853Courtesy of GENERAL MOTORS CORP.
  4. Disconnect the fuel injector electrical harness connector (2) from the engine wiring harness connector (3).
  5. Disconnect the fuel pressure regulator vent tube from the fuel pressure regulator.
  6. Remove the fuel rail if intake manifold replacement is necessary. Refer to Fuel Injectors and Fuel Rail Replacement in Engine Controls-2.6L and 3.2L.
    7. Fig 3: Intake Manifold, Bolts & Seals
    GM217280Courtesy of GENERAL MOTORS CORP.
  7. Remove the intake manifold bolts (1).
  8. Remove the intake manifold (2) from the intake manifold flange.
  9. Remove the seals (3).
  10. Mask off the open ports to the intake manifold flange, in order to prevent foreign objects from entering the engine.
  11. If necessary, disassemble the intake manifold. Refer to Intake Manifold Disassemble .
  12. Clean and inspect the intake manifold. Refer to Intake Manifold Cleaning and Inspection .
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