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 1224 (Engine Mechanical - 3.8L (On-Vehicle)) >> Repair Instructions >> Intake Manifold Replacement - Upper >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2002 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.
  1. Disconnect the negative battery cable. Refer to BATTERY NEGATIVE CABLE DISCONNECT/CONNECT PROCEDURE .
  2. Remove the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement (L36)  or Fuel Injector Sight Shield Replacement (L67) .
  3. Remove the air cleaner intake duct. Refer to AIR CLEANER INTAKE DUCT .
  4. Drain the cooling system. Refer to DRAINING AND FILLING COOLING SYSTEM .
  5. Remove the right spark plug wires from the ignition control module and reposition.
    Fig 1: EGR Heat Shield
    G01703191Courtesy of GENERAL MOTORS CORP.
  6. Relieve the fuel pressure. Refer to FUEL SYSTEM PRESSURE RELEASE .
  7. Remove the fuel rail assembly. Refer to FUEL RAIL & INJECTORS .
  8. Remove the brake booster hose from the vacuum source manifold.
  9. Remove the EGR valve wiring harness heat shield nut, bolt and the EGR shield from the upper intake manifold.
  10. Remove the throttle body support bracket bolt.
  11. Disconnect the electrical connectors from the following:
    • EVAP purge solenoid
    • Throttle position (TP) sensor
    • Idle air control (IAC) valve
    • Manifold absolute pressure (MAP) sensor
    • Mass air flow (MAF) sensor
  12. Remove the EVAP purge solenoid vacuum line from the throttle body.
  13. Remove the accelerator and the cruise control bracket from the throttle body.
    Fig 2: Throttle Body Upper Support Bracket
    G01703192Courtesy of GENERAL MOTORS CORP.
  14. Remove the upper intake manifold bolts and stud.
  15. Clean the upper intake manifold bolt threads.
  16. Remove the upper intake manifold by lifting the back of the intake and sliding the manifold forward from the throttle body support bracket.
    Fig 3: Upper Intake Manifold
    G01703193Courtesy of GENERAL MOTORS CORP.
  17. Remove the upper-to-lower intake manifold carrier gasket from the upper intake manifold.
  18. If the upper intake manifold is being replaced remove the following:
    • Throttle body
    • Manifold absolute pressure (MAP) sensor
    • Positive crankcase ventilation (PCV) valve
    • Vacuum source manifold
      Fig 4: Upper Intake Manifold & Carrier Gasket
      G01703194Courtesy of GENERAL MOTORS CORP.
scientia non olet · About LEMON Manuals