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Home >> Chevrolet >> 2001 >> Venture Base, Van Passenger >> Repair and Diagnosis >> External Pages >> Different car >> Section 516 (Engine Mechanical - 4.3L (LU3)) >> Repair Instructions >> Off-Vehicle Repair Instructions >> Intake Manifold Assemble (LU3)

Intake Manifold Assemble (LU3)

WARNING: This page is about a different car, the 2003 GMC Sonoma, 2003 GMC Jimmy, 2003 Chevrolet S10 Pickup, and 2003 Chevrolet Blazer. However, it is still accessible from the selected car via links, so may be relevant.
  1. If reusing the fastener, apply threadlock GM P/N 12345382 (Canadian P/N 10953489) or equivalent, to the threads of the fuel meter body bracket bolt.
    NOTE: Refer to FASTENER NOTICE in Cautions and Notices.
  2. Install the fuel meter body bracket and bolt.

    Tighten 

    Tighten the fuel meter bracket bolt to 10 N.m (89 lb in).

    Fig 1: Installing Fuel Meter Body Bracket & Bolt
    G01977928Courtesy of GENERAL MOTORS CORP.

    Important:  All injector lines must face forward as the fuel meter body is snapped into the bracket. Also, the number three fuel tube must be positioned behind the number one fuel tube to eliminate interference with the upper intake manifold when installed.

  3. Install the fuel meter body into the fuel meter body bracket.
  4. Install the 6 injectors into the proper lower intake manifold bores in proper sequence (3, 5, 1, 2, 4, 6).
  5. Inspect the injectors in order to ensure that they are firmly seated and locked in the lower intake manifold bores.
  6. Ensure that the electrical connections of the injectors are positioned so that they do not interfere with each other, and are pointing towards the center of the intake manifold. Rotate the electrical connector inboard if necessary. Also, ensure there is no tension on the injector wires.
  7. Install a NEW upper intake manifold to lower intake manifold gasket into the groove of the upper intake manifold.
  8. Install the upper intake manifold onto the lower intake manifold.
  9. If reusing the fasteners, apply threadlock GM P/N 12345382 (Canadian P/N 10953489) or equivalent, to the threads of the upper intake manifold attaching studs.
  10. Install the upper intake manifold attaching studs.

    Tighten 

    1. 10.1. Tighten the upper intake manifold attaching studs on the first pass to 5 N.m (44 lb in).
    2. 10.2. Tighten the upper intake manifold attaching studs on the final pass to 9 N.m (80 lb in).
      Fig 2: Installing Upper Intake Manifold Attaching Studs
      G01977929Courtesy of GENERAL MOTORS CORP.
  11. If reusing the fasteners, apply threadlock GM P/N 12345382 (Canadian P/N 10953489) or equivalent, to the threads of the evaporative emission (EVAP) canister purge solenoid valve studs.
  12. Install the EVAP canister purge solenoid valve and studs.

    Tighten 

    Tighten the EVAP canister purge solenoid valve studs to 10 N.m (89 lb in).

  13. Install the engine wiring harness bracket and nut.

    Tighten 

    Tighten the engine wiring harness bracket nut to 12 N.m (106 lb in).

    Fig 3: Installing Engine Wiring Harness Bracket
    G01977930Courtesy of GENERAL MOTORS CORP.
  14. Install the NEW fuel seals (8), black O-rings, into the fuel meter body.
  15. Install the NEW spacer rings (7), flat washers, into the fuel meter body.
  16. Install the NEW fuel seals (6), yellow O-rings, into the fuel meter body.
  17. Install the NEW fuel seal retainers (5) into the fuel meter body.
  18. Install the fuel pipe (3) into the fuel meter body.
  19. Install the fuel pipe retainer bracket (2) onto the fuel pipe.
  20. Install the fuel pipe retainer bracket nuts (1).
  21. If reusing the fastener, apply threadlock GM P/N 12345382 (Canadian P/N 10953489) or equivalent, to the threads of the fuel pipe bolt.
  22. Install the fuel pipe bolt (4).

    Tighten 

    1. 22.1. Tighten the fuel pipe bracket nuts to 3 N.m (27 lb in).
    2. 22.2. Tighten the fuel pipe bolt to 6 N.m (53 lb in).
      Fig 4: Installing Fuel Pipe, Seals, Retainers, Bracket, & Spacer Rings
      G01977931Courtesy of GENERAL MOTORS CORP.
  23. Install a NEW manifold absolute pressure (MAP) sensor seal onto the MAP sensor.
  24. Apply a small amount, approximately 1 drop, of clean engine oil to the MAP sensor seal.
  25. Install the MAP sensor into the upper intake manifold.
    Fig 5: Installing MAP
    G01977932Courtesy of GENERAL MOTORS CORP.
  26. Install the ignition coil and studs.

    Tighten 

    Tighten the ignition coil studs to 12 N.m (106 lb in).

    Fig 6: Installing Ignition Coil & Studs
    G01977933Courtesy of GENERAL MOTORS CORP.
  27. If reusing the engine coolant temperature (ECT) sensor plug (1) or the ECT sensor (2), if equipped, apply sealant GM P/N 12346004 (Canadian P/N 10953480) or equivalent, to the threads of the ECT sensor plug (1) or the ECT sensor (2).
  28. Install the ECT sensor or plug, if equipped, into the front of the lower intake manifold.

    Tighten 

    Tighten the ECT sensor or plug to 20 N.m (15 lb ft).

    Fig 7: Installing ECT Sensor & Plug
    G01977934Courtesy of GENERAL MOTORS CORP.
  29. Install the engine coolant thermostat.
  30. Install the water outlet (1 or 2).
  31. Install the water outlet studs.

    Tighten 

    Tighten the water outlet studs to 25 N.m (18 lb ft).

    Fig 8: Installing EGR Valve & Gasket
    G01977935Courtesy of GENERAL MOTORS CORP.
  32. Install a NEW throttle body gasket into the groove in the upper intake manifold.
  33. Install the throttle body onto the upper intake manifold.
    Fig 9: Installing Throttle Body & Gasket
    G01977936Courtesy of GENERAL MOTORS CORP.
  34. If reusing the fasteners, apply threadlock GM P/N 12345382 (Canadian P/N 10953489) or equivalent, to the threads of the throttle body attaching studs.
  35. Install the throttle body attaching studs.

    Tighten 

    Tighten the throttle body attaching studs to 9 N.m (80 lb in).

    Fig 10: Installing Throttle Body Attaching Studs
    G01977937Courtesy of GENERAL MOTORS CORP.
  36. Install the accelerator control cable bracket, the studs, and the nuts.

    Tighten 

    1. 36.1. Tighten the accelerator control cable bracket stud to the intake manifold to 6 N.m (53 lb in).
    2. 36.2. Tighten the accelerator control cable bracket nuts to 12 N.m (106 lb in).
    3. 36.3. Tighten the accelerator control cable bracket stud to the throttle body to 12 N.m (106 lb in).
      Fig 11: Installing Actuator Control Cable Bracket
      G01977938Courtesy of GENERAL MOTORS CORP.
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