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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1928 (Engine Mechanical - 3.5L) >> Repair Instructions - On Vehicle >> Lower Intake Manifold Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
    NOTE: This engine uses a sequential multiport fuel injection system. Injector wiring harness connectors must be connected to their appropriate fuel injector or exhaust emissions and engine performance may be seriously affected.
  1. Disconnect the battery ground negative cable. Refer to Battery Negative Cable Disconnection and Connection .
  2. Remove the upper intake manifold. Refer to Upper Intake Manifold Replacement .
  3. Remove the left valve rocker arm cover. Refer to Valve Rocker Arm Cover Replacement - Left Side .
  4. Remove the right valve rocker arm cover. Refer to Valve Rocker Arm Cover Replacement - Right Side .
  5. Disconnect the fuel feed line from the fuel rail. Refer to Metal Collar Quick Connect Fitting Service .
    6. Fig 1: Identifying Engine Harness Clip (2) & Strut Bracket
    GM1608276Courtesy of GENERAL MOTORS CORP.
  6. Disconnect fuel injector inline connector.
    7. Fig 2: View Of Fuel Rail Assembly & Intake Manifold
    GM1608817Courtesy of GENERAL MOTORS CORP.
  7. Remove the fuel injector harness connector bracket bolt from the intake manifold.
  8. Disconnect the engine coolant temperature (ECT) electrical connector.
  9. Disconnect the camshaft position (CMP) sensor electrical connector.
  10. Remove the fuel injector rail bolts.
  11. Remove the fuel rail.
    12. Fig 3: View Of Lower Intake Manifold & Bolts
    GM54281Courtesy of GENERAL MOTORS CORP.
  12. Remove the lower intake manifold bolts.
  13. Remove the lower intake manifold.
    14. Fig 4: Identifying Valve Rocker Arm & Bolt
    GM1557679Courtesy of GENERAL MOTORS CORP.
  14. Loosen the valve rocker arm bolts.
    15. NOTE: Place the valve train components in a rack in order to ensure that the components are installed in the same location from which they where removed.
  15. Remove the valve rocker arms.
  16. Remove the push rods:
    • The intake push rods measure 147.51 mm (5.81 in).
    • The exhaust push rods measure 154.87 mm (6.1 in).
    17. Fig 5: Identifying Intake Manifold Gaskets & Seals
    GM1557681Courtesy of GENERAL MOTORS CORP.
  17. Remove the lower intake manifold gaskets and seals.
  18. Clean the lower intake manifold gasket and seal surfaces on the cylinder heads and the engine block.
  19. Clean the gasket and seal surfaces on the lower intake manifold with degreaser.
  20. Remove all the loose room temperature vulcanizing (RTV) sealer.
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