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DIY: Intake Manifold Gasket: GM 3.4 Liter V-6

If you have a General Motors vehicle with a V-6 engine in it, this is something you will want to know how to do and save yourself some major bucks.
» Before You Start
» Part 1 » Part 2
» Part 3 » Part 4
» Part 5 » Part 6
» Part 7 » Part 8
» Part 9 » Part 10

3.4 Liter V-6

Intake Manifold Replacement (Upper)

Removal Procedure:

Important: This engine uses a sequential multiport fuel injection system. Connect the injector wiring harness connectors to their appropriate fuel injector or exhaust emissions and engine performance may be seriously affected.

  1. Disconnect the battery ground (negative) cable.
  2. Carefully disconnect the vacuum hose connection from the throttle body air inlet duct.
  3. Disconnect the wiring harness connection from the intake air temperature (IAT) sensor in the throttle body air inlet duct.
  4. Carefully disconnect the throttle body air inlet duct.
  5. Drain the engine coolant from the cooling system.
  6. Remove the accelerator control and cruise control cables with bracket from the throttle body.
  7. Disconnect the wiring harness connectors from the throttle body:

    • Throttle position (TP) sensor.
    • Idle air control (IAC) valve.

  8. Disconnect the wiring harness attachment clips.

    • Camshaft position (CMP) sensor wiring harness.
    • Left spark plug wire harness.

  9. Disconnect the thermostat bypass pipe coolant hoses from the throttle body.
  10. Remove the rear generator brace.
  11. Remove the following components:

    • The vacuum lines at the upper intake manifold.
    • The MAP sensor.
    • The EGR valve.
    • The spark plug wires.
    • The ignition control module.
    • The upper intake manifold.
    • The upper intake manifold gaskets.

  12. Remove the throttle body.
  13. Clean the seal surfaces on the manifold with degreaser.
» Before You Start           » Part 1      » Part 2
» Part 3       » Part 4       » Part 5       » Part 6
» Part 7       » Part 8       » Part 9       » Part 10

Additional Information provided courtesy of and Warranty Direct
© 2000-2007 Vincent T. Ciulla

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