LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2001 >> Venture Base, Van Passenger >> Repair and Diagnosis >> External Pages >> Different car >> Section 789 (Engine Mechanical (On-Vehicle)) >> Repair Instructions >> Intake Manifold Replacement - Lower >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2002 Pontiac Montana, 2002 Oldsmobile Silhouette, and 2002 Chevrolet Venture. However, it is still accessible from the selected car via links, so may be relevant.

Important:  The fuel injector wiring harness connectors must be connected to their respective fuel injectors. Failure to connect the fuel injector connectors to their respective fuel injectors may result in excessive exhaust emissions and poor engine performance.

  1. Remove the upper intake manifold. Refer to INTAKE MANIFOLD REPLACEMENT - Upper .
  2. Remove the engine left side valve rocker arm cover. Refer to VALVE ROCKER ARM COVER REPLACEMENT - Left .
  3. Remove the engine right side valve rocker arm cover. Refer to VALVE ROCKER ARM COVER REPLACEMENT - Right .
    Fig 1: Wiring Harness For Engine Coolant Temperature Sensor
    G01828714Courtesy of GENERAL MOTORS CORP.
  4. Disconnect the wiring harness from the engine coolant temperature (ECT) sensor.

    Important:  Use masking tape or another appropriate method in order to identify each fuel injector wiring harness connector cylinder number.

    5. Fig 2: Fuel Injector, Manifold Air Pressure & ECT Wiring Harness
    G01828715Courtesy of GENERAL MOTORS CORP.
  5. Disconnect and remove the fuel injector, manifold air pressure (MAP) and ECT wiring harness.
  6. Remove the fuel feed and return pipe from the fuel injector rail. Refer to FUEL HOSES/PIPES - ENGINE COMPARTMENT .
    7. Fig 3: Fuel Injector Rail
    G01828716Courtesy of GENERAL MOTORS CORP.
  7. Remove the fuel injector rail. Refer to FUEL RAIL & INJECTORS .

    Important:  Do NOT disconnect the power steering pipes or hoses from the power steering pump.

  8. Remove the power steering pump from the front engine cover and reposition aside. Refer to POWER STEERING PUMP REPLACEMENT .
  9. Disconnect the heater inlet pipe with heater hose from the lower intake manifold and reposition aside. Refer to HEATER PIPE REPLACEMENT - INLET .
  10. Disconnect the inlet radiator hose from the engine. Refer to RADIATOR HOSE REPLACEMENT - INLET .
  11. Disconnect the thermostat bypass hose from the lower intake manifold pipe.
    Fig 4: Thermostat Bypass Hose
    G01828717Courtesy of GENERAL MOTORS CORP.
  12. Remove the lower intake manifold bolts.
    Fig 5: Lower Intake Manifold Bolts
    G01828718Courtesy of GENERAL MOTORS CORP.
  13. Remove the lower intake manifold.
    14. Fig 6: Lower Intake Manifold
    G01828719Courtesy of GENERAL MOTORS CORP.
  14. Loosen the valve rocker arms and remove the push rods.
  15. Remove the lower intake manifold gaskets and seals.
    Fig 7: Lower Intake Manifold Gaskets & Seals
    G01828720Courtesy of GENERAL MOTORS CORP.
  16. Clean the lower intake manifold gasket and seal surfaces on the cylinder heads and the engine block.
  17. Clean and inspect the lower intake manifold.
  18. If you are replacing the lower intake manifold, remove the ECT sensor. Refer to ENGINE COOLANT TEMPERATURE SENSOR .
  19. If you are REPLACING the lower intake manifold, remove the thermostat. Refer to THERMOSTAT REPLACEMENT .
scientia non olet · About LEMON Manuals