LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 804 (Engine Mechanical - 4.3L (Unit Repair)) >> Repair Instructions >> Intake Manifold Disassemble (LU3)

Intake Manifold Disassemble (LU3)

WARNING: This page is about a different car, the 2002 GMC Savana and 2002 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the nuts, the studs, and the accelerator control cable bracket.
    Fig 1: Nuts, Studs & Accelerator Control Cable Bracket
    G01689765Courtesy of GENERAL MOTORS CORP.
  2. Remove the throttle body attaching studs.
    Fig 2: Throttle Body Attaching Studs
    G01689766Courtesy of GENERAL MOTORS CORP.
  3. Remove the throttle body.
  4. Remove the throttle body to upper intake manifold gasket.
  5. Discard the throttle body to upper intake manifold gasket.
    Fig 3: Throttle Body
    G01689767Courtesy of GENERAL MOTORS CORP.
  6. Remove the water outlet studs.
  7. Remove the water outlet (1 or 2).
  8. Remove the engine coolant thermostat.
    Fig 4: Water Outlet & Studs
    G01689768Courtesy of GENERAL MOTORS CORP.

    Important:  Note the position and direction of the exhaust gas recirculation (EGR) valve before removal. It is possible to improperly install the EGR valve 180 degrees from the original position.

  9. Remove the exhaust gas recirculation (EGR) valve bolts.

    Some applications will not have an EGR valve.

    Fig 5: EGR Valve Bolts
    G01689769Courtesy of GENERAL MOTORS CORP.
    NOTE: The Linear EGR valve is an electrical component. DO NOT soak in any liquid cleaner or solvent because damage may result.
  10. Remove the EGR valve and the EGR valve gasket from the lower intake manifold.
  11. Discard the EGR valve gasket.
    Fig 6: EGR Valve & Gasket
    G01689770Courtesy of GENERAL MOTORS CORP.
  12. Remove the engine coolant temperature (ECT) sensor plug (1) or the ECT sensor (2) from the front of the lower intake manifold, if equipped.
    Fig 7: ECT Sensor & Plug
    G01689771Courtesy of GENERAL MOTORS CORP.
  13. Remove the studs and the ignition coil.
    Fig 8: Studs & Ignition Coil
    G01689772Courtesy of GENERAL MOTORS CORP.
  14. Remove the manifold absolute pressure (MAP) sensor.
  15. Remove the MAP sensor seal from the MAP sensor.
  16. Discard the MAP sensor seal.
    Fig 9: MAP Sensor & Seal
    G01689773Courtesy of GENERAL MOTORS CORP.
  17. Remove the fuel pipe bolt (4).
  18. Remove the fuel pipe retainer nuts (1).
  19. Remove the fuel pipe retainer (2).
  20. Remove the fuel pipe (3).
  21. Remove and discard the fuel seal retainers (5).
  22. Remove and discard the fuel seals (6), yellow O-rings.
  23. Remove and discard the spacer rings (7), flat washers.
  24. Remove and discard the fuel seals (8), black O-rings.
    Fig 10: Fuel Pipe Components
    G01689774Courtesy of GENERAL MOTORS CORP.
  25. Remove the studs and the evaporative emission (EVAP) canister purge solenoid valve.
  26. Remove the nut and the engine wiring harness bracket.
    Fig 11: Studs, Nut & Engine Wiring Harness Bracket
    G01689775Courtesy of GENERAL MOTORS CORP.
  27. Remove the upper intake manifold attaching studs.
  28. Remove the upper intake manifold.
  29. Remove the upper intake manifold to lower intake manifold gasket.
  30. Discard the upper intake manifold to lower intake manifold gasket.
    Fig 12: Upper Intake Manifold & Attaching Studs
    G01689776Courtesy of GENERAL MOTORS CORP.
  31. Remove the fuel meter body seal and discard.

    Important:  The injectors may require increased effort when removing.

  32. Remove the 6 injectors from the lower intake manifold bores.
  33. Remove the fuel meter body.

    Important:  Discard the old fuel meter body bracket and install a new bracket when converting from SFI (L35) to MFI (LU3) fuel systems.

  34. Remove the bolt and the fuel meter body bracket.
    Fig 13: Fuel Meter Body Injectors
    G01689777Courtesy of GENERAL MOTORS CORP.
scientia non olet · About LEMON Manuals