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Home >> Chevrolet >> 2002 >> Monte Carlo LS >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine Mechanical - 3.4L V6 - VIN (E) (On-Vehicle) >> Repair Instructions >> Intake Manifold (Upper) - Replacement >> Removal Procedure

Removal Procedure

  1. Disconnect the negative battery cable.
  2. Remove the vacuum hoses from the following:
    • Fuel pressure regulator
    • Evaporative emissions (EVAP) canister purge valve
    • Manifold vacuum source
    • Brake booster
    • Heater and air conditioning source
    Fig 1: Locating Vacuum Hoses
    G01806731Courtesy of GENERAL MOTORS CORP.
  3. Disconnect the electrical connectors from the following:
    • Exhaust gas recirculation (EGR) valve
    • Mass air flow (MAF) sensor
    • Intake air temperature (IAT) sensor
    • Idle air control (IAC) valve
    • Throttle position (T/P) sensor
    • Evaporative emission (EVAP) canister purge valve
  4. Remove the air cleaner intake duct.
  5. Drain the cooling system.
  6. Remove the accelerator control and cruise control cables with bracket from the throttle body.
  7. Remove the left side spark plug wires from the spark plugs.
  8. Remove the following wiring harnesses from the retainers:
    • Camshaft position (CMP) sensor wiring harness
    • Left side spark plug wire harness
    • Engine wiring harness
  9. Remove the thermostat bypass pipe coolant hoses (3,4) from the throttle body.
  10. Remove the ignition coil bracket with the coils.
  11. Remove the EVAP canister purge valve.
  12. Remove the manifold absolute pressure (MAP) sensor and the bracket.
  13. Remove the exhaust gas recirculation (EGR) valve.
    Fig 2: EGR Valve
    G01806733Courtesy of GENERAL MOTORS CORP.
  14. Remove the right upper intake manifold bolts and the studs.
    Fig 3: Right Upper Intake Manifold Bolts And The Studs
    G01806734Courtesy of GENERAL MOTORS CORP.
  15. Remove the left upper intake manifold bolts.
  16. Remove the upper intake manifold.
    Fig 4: Upper Intake Manifold
    G01806735Courtesy of GENERAL MOTORS CORP.
  17. Remove the upper intake manifold gasket.
    Fig 5: Upper Intake Manifold Gasket
    G01806736Courtesy of GENERAL MOTORS CORP.
  18. If replacing the upper intake manifold, remove the throttle body.
  19. Clean the upper intake gasket mating surfaces.
    Fig 6: Throttle Body
    G01806737Courtesy of GENERAL MOTORS CORP.
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