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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1220 (Engine Mechanical - 3.1L (On-Vehicle)) >> Repair Instructions >> Intake Manifold Replacement - Lower >> 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 upper intake manifold. Refer to Intake Manifold Replacement - Upper .
  3. Remove the left valve rocker arm cover. Refer to Valve Rocker Arm Cover Replacement - Left .
  4. Remove the right valve rocker arm cover. Refer to Valve Rocker Arm Cover Replacement - Right .
  5. Disconnect the engine coolant temperature (ECT) sensor electrical connector.
    Fig 1: ECT Sensor Electrical Connector
    G01702609Courtesy of GENERAL MOTORS CORP.
  6. Disconnect and remove the fuel injector and the manifold absolute pressure (MAP) sensor wiring harnesses.
    Fig 2: Fuel Injector & MAP Sensor Wiring Harness
    G01702610Courtesy of GENERAL MOTORS CORP.
  7. Remove the fuel pipe clip bolt.
    Fig 3: Fuel Pipe Clip Bolt
    G01702611Courtesy of GENERAL MOTORS CORP.
  8. Remove the fuel pipe clip.
    Fig 4: Fuel Pipe Clip
    G01702612Courtesy of GENERAL MOTORS CORP.
  9. Remove the fuel feed pipe from the fuel injector rail. Refer to FUEL LINE DISCONNECT FITTINGS .
    Fig 5: Fuel Feed Pipe
    G01702613Courtesy of GENERAL MOTORS CORP.
  10. Remove the fuel return pipe from the fuel injector rail. Refer to FUEL LINE DISCONNECT FITTINGS .
    Fig 6: Fuel Return Pipe
    G01702614Courtesy of GENERAL MOTORS CORP.
  11. Remove the fuel injector rail. Refer to FUEL RAIL & INJECTORS .
  12. Remove the power steering pump from the front engine cover and reposition. Refer to POWER STEERING PUMP REPLACEMENT (3.8L) or POWER STEERING PUMP REPLACEMENT (3.1 L) .
    Fig 7: Fuel Injector Rail
    G01702615Courtesy of GENERAL MOTORS CORP.
  13. Remove the heater inlet pipe with heater hose from the lower intake manifold and reposition.
  14. Remove the radiator inlet hose from the engine. Refer to RADIATOR HOSE REPLACEMENT - INLET (3.1 L) or RADIATOR HOSE REPLACEMENT - INLET (3.8L) .
    Fig 8: Heater Inlet Pipe
    G01702616Courtesy of GENERAL MOTORS CORP.
  15. Remove the thermostat bypass hose from the thermostat bypass pipe and lower intake manifold pipe.
    Fig 9: Thermostat Bypass Hose
    G01702617Courtesy of GENERAL MOTORS CORP.
  16. Remove the lower intake manifold bolts.
  17. Remove the lower intake manifold.
  18. Remove the valve rocker arms and pushrods. Refer to Valve Rocker Arm and Push Rod Replacement .
    Fig 10: Lower Intake Manifold
    G01702618Courtesy of GENERAL MOTORS CORP.
  19. Remove the lower intake manifold gaskets and seals.
  20. Clean the lower intake manifold gasket mating surfaces.
  21. Remove and clean all the RTV sealant from the lower intake manifold and the engine block (1).
    Fig 11: Lower Intake Manifold Gaskets
    G01702619Courtesy of GENERAL MOTORS CORP.
  22. Remove the ECT sensor.
    Fig 12: ECT Sensor
    G01702620Courtesy of GENERAL MOTORS CORP.
  23. Remove the water outlet bolts.
  24. Remove the water outlet.
    Fig 13: Water Outlet
    G01702621Courtesy of GENERAL MOTORS CORP.
  25. Remove the thermostat.
    Fig 14: Thermostat
    G01702622Courtesy of GENERAL MOTORS CORP.
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