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Home >> Isuzu >> 2007 >> i-290 LS, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 23 (Engine Mechanical - 4.6L - 1 Of 4) >> On-Vehicle Repair Instructions (1 Of 2) >> Intake Manifold Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2007 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Identifying Engine Harness Electrical Connectors
    GM1662120Courtesy of GENERAL MOTORS CORP.
  1. Remove the fuel injector sight shield cover. Refer to Fuel Injector Sight Shield Replacement .
  2. Remove the air cleaner outlet duct. Refer to Air Cleaner Outlet Duct Replacement .
  3. Disconnect the front ignition coil module engine harness electrical connector (3).
  4. Disconnect the front fuel injectors engine harness electrical connectors (1).
    5. Fig 2: Locating Engine Harness Electrical Connectors
    GM1662118Courtesy of GENERAL MOTORS CORP.
  5. Disconnect the rear ignition coil module engine harness electrical connector (4).
  6. Disconnect the rear fuel injectors engine harness electrical connectors (3).
    7. Fig 3: Identifying PCV Foul Air Tube Quick Connect Fitting
    GM1661024Courtesy of GENERAL MOTORS CORP.
  7. Disconnect the positive crankcase ventilation (PCV) foul air tube quick connect fitting from the right camshaft cover. Refer to Plastic Collar Quick Connect Fitting Service .
    8. Fig 4: Identifying PCV Fresh Air Tube
    GM1661022Courtesy of GENERAL MOTORS CORP.
  8. Disconnect the PCV fresh air tube quick connect fitting from the camshaft cover. Refer to Plastic Collar Quick Connect Fitting Service .
    9. Fig 5: Identifying Fuel Feed & EVAP Line
    GM1662130Courtesy of GENERAL MOTORS CORP.
  9. Disconnect the fuel feed line (1) quick connect fitting at the fuel rail. Refer to Metal Collar Quick Connect Fitting Service .
    10. Fig 6: Identifying Surge Tank Inlet Hose/Pipe
    GM1662131Courtesy of GENERAL MOTORS CORP.
  10. Reposition the radiator surge tank inlet hose/pipe clamp at the surge tank.
  11. Remove the surge tank inlet hose/pipe from the surge tank.
    12. Fig 7: View Of Surge Tank Inlet Hose/Pipe
    GM1662132Courtesy of GENERAL MOTORS CORP.
  12. Reposition the radiator surge tank inlet hose/pipe clamp at the engine.
  13. Remove the surge tank inlet hose/pipe from the engine fitting.
    14. Fig 8: Identifying Surge Tank Inlet Hose/Pipe & Clips
    GM1662133Courtesy of GENERAL MOTORS CORP.
  14. Remove the 2 pushnuts securing the surge tank inlet hose/pipe to the fuel rail studs.
  15. Remove the surge tank inlet hose/pipe from the fuel rail studs.
  16. Remove the engine harness retainer from the fuel rail stud.
    17. Fig 9: Locating Coolant Heater Cord Tabs
    GM1662134Courtesy of GENERAL MOTORS CORP.
  17. Remove the coolant heater cord tabs from the fuel rail studs, if equipped.
    18. Fig 10: View Of Fuel Rail, Bracket & Bolts
    GM1662136Courtesy of GENERAL MOTORS CORP.
  18. Remove the fuel rail bracket nut at the rear left lift bracket.
  19. Remove the fuel rail studs.
  20. Remove the fuel rail.
    21. Fig 11: Locating Plenum Duct Clamp Screw
    GM1662138Courtesy of GENERAL MOTORS CORP.
  21. Loosen the plenum duct clamp screw (1) at the water pump housing.
    22. Fig 12: View Of Intake Manifold
    GM1662137Courtesy of GENERAL MOTORS CORP.
  22. Remove intake manifold bolts.
  23. Position the power steering aside. Refer to POWER STEERING PUMP REPLACEMENT
  24. Remove the intake manifold.
  25. Disconnect the PCV foul air tube quick connect fitting at the intake manifold. Refer to Plastic Collar Quick Connect Fitting Service .
  26. Remove the PCV foul air tube from the retaining features on the intake manifold.
  27. Remove and discard the old seals.
  28. Clean and inspect the intake manifold. Refer to Intake Manifold Cleaning and Inspection .
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