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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 Plenum Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different variant/trim than selected.
  1. Remove the intake plenum air inlet hose clamps and hoses from the throttle body.
    Fig 1: View Of Intake Plenum Air Inlet Hose Clamps & Hoses
    GM785802Courtesy of GENERAL MOTORS CORP.
  2. Disconnect the fuel pressure regulator atmospheric vent tube from the bottom of the throttle body.
  3. Remove the bolts securing the throttle body to the intake plenum.
    Fig 2: Identifying Throttle Body-To-Intake Plenum Bolts
    GM345338Courtesy of GENERAL MOTORS CORP.
  4. Remove the throttle body from the intake plenum and crankcase vent adapter, allowing it to be supported by the throttle body inlet heater hose.
  5. Remove the throttle body O-ring seals.
  6. Remove the 3 bolts securing the crankcase vent adapter to the intake plenum.
    Fig 3: Identifying Crankcase Vent Adapter-To-Intake Plenum Bolts
    GM821099Courtesy of GENERAL MOTORS CORP.
  7. Lift the crankcase vent adapter from the intake plenum, and position aside.
  8. Disconnect the vacuum brake booster hose retainer (1) from the rear of the intake plenum-RHD only.
    Fig 4: Identifying Crankcase Ventilation Dirty Air Hose Retainer From Fuel Pipe
    GM794128Courtesy of GENERAL MOTORS CORP.
  9. Disconnect the crankcase ventilation dirty air hose retainer (2) from the fuel pipe.
    10. Fig 5: Locating Remote Power Steering Fluid Reservoir Mounting Bolts
    GM785730Courtesy of GENERAL MOTORS CORP.
  10. Remove the remote power steering fluid reservoir mounting bolts (1, 3) ONLY, and position aside.
  11. Disconnect the electrical connector (1) and vacuum hose (2) from the switchover valve at the rear of the plenum.
    Fig 6: Locating Electrical Connector & Vacuum Hose From Switchover Valve
    GM349112Courtesy of GENERAL MOTORS CORP.
  12. Remove the bolt (1) securing the throttle body heater inlet hose/pipe to the intake plenum (2).
    Fig 7: Identifying Throttle Body Heater Inlet Hose/Pipe-To-Intake Plenum Bolt
    GM785825Courtesy of GENERAL MOTORS CORP.
  13. Disconnect the vacuum brake booster hose (3) from the vacuum source.
  14. Remove the 2 bolts securing the engine control module (ECM) bracket to the intake plenum.
    Fig 8: Identifying ECM Bracket-To-Intake Plenum Bolts
    GM797516Courtesy of GENERAL MOTORS CORP.
  15. Remove the intake plenum bolt caps.
    Fig 9: Intake Plenum & Bolts
    GM764826Courtesy of GENERAL MOTORS CORP.
  16. Remove the intake plenum bolts.
  17. Lift the intake plenum from the intake manifold.
  18. Remove the intake plenum O-ring seals.
  19. Mask off the open ports to the intake manifold, in order to prevent foreign objects from entering the engine.
  20. Disassemble the intake plenum if necessary. Refer to Intake Plenum Manifold Disassemble .
  21. Clean and inspect the intake plenum. Refer to Intake Plenum Manifold Cleaning and Inspection .
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