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Home >> Cadillac >> 2004 >> CTS Base, 3.2 N >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 13 (Engine Mechanical - 3.6L (Ly7) (Repair Procedures -- 1 Of 5)) >> On-Vehicle Repair Instructions - Part 1 >> Intake Manifold Replacement - Lower >> Removal Procedure

Removal Procedure

WARNING: This page is about a different variant/trim than selected.
  1. Turn the ignition OFF.
  2. Remove the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement .
    3. Fig 1: View Of Air Inlet Duct
    GM1305320Courtesy of GENERAL MOTORS CORP.
  3. Remove the air inlet duct. Refer to Air Cleaner Intake Duct Replacement in Engine Controls - 3.6L (LY7).
  4. Note the booster hose routing. Disconnect the brake booster check valve and hose from the brake booster.
  5. Reposition the brake booster hose to the intake manifold.
    6. Fig 2: View Of Purge Solenoid Valve And Electrical Connector
    GM887878Courtesy of GENERAL MOTORS CORP.
  6. Disconnect the purge solenoid valve electrical connector.
    7. Fig 3: Top Of Engine View
    GM1348201Courtesy of GENERAL MOTORS CORP.
  7. Disconnect the purge line (3) from the purge solenoid valve.
    8. Fig 4: Identifying Fuel Injector Harness Electrical Connector
    GM887871Courtesy of GENERAL MOTORS CORP.
  8. Disconnect the fuel injector harness electrical connector.
    9. Fig 5: View Of Throttle Body Electrical Connector
    GM887881Courtesy of GENERAL MOTORS CORP.
  9. Disconnect the throttle body electrical connector.
    10. Fig 6: View Of Wiring Harness Conduit
    GM1285256Courtesy of GENERAL MOTORS CORP.
  10. Remove the wiring harness retainer.
    11. Fig 7: View Of Intake Manifold Brace & Bolts
    GM1306504Courtesy of GENERAL MOTORS CORP.
  11. Remove the upper intake manifold brace bolts (1 and 2) and reposition the brace with the wiring harness.
  12. Remove the wiring harness retainer from the right side of the throttle body.
  13. Disconnect the positive crankcase ventilation (PCV) hose from the right bank camshaft cover.
    14. Fig 8: Identifying Barometric Pressure Sensor And Electrical Connector
    GM945437Courtesy of GENERAL MOTORS CORP.
  14. Disconnect the barometric pressure sensor electrical connector.
    15. Fig 9: View Of Communicator And Intake Manifold Runner Control Solenoid Electrical Connectors
    GM945390Courtesy of GENERAL MOTORS CORP.
  15. Disconnect the intake manifold runner control solenoid electrical connector.
  16. Remove the left bank ignition coil wiring harness from the bracket.
    17. Fig 10: Removing & Installing Intake Manifold Bolts
    GM1391830Courtesy of GENERAL MOTORS CORP.
    IMPORTANT:
    • Do not remove the upper to lower intake manifold bolts.
    • DO NOT kink or damage the fuel pipe.
  17. Remove the intake manifold bolts.
  18. Reposition the intake manifold to gain access to the fuel pipe connector.
    19. Fig 11: View Of Quick-Connect Fitting Retainer
    GM1348200Courtesy of GENERAL MOTORS CORP.
  19. Remove the fuel feed pipe retainer.
  20. Disconnect the fuel feed pipe from the fuel rail. Refer to Quick Connect Fitting(s) Service (Metal Collar) in Engine Controls - 3.6L (LY7).
  21. Disassemble the intake manifold as necessary. Refer to Intake Manifold Disassemble .
  22. Clean and inspect the intake manifold and the sealing surfaces. Refer to Intake Manifold Cleaning and Inspection .
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