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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1556 (Engine Exhaust System - 5.7L) >> Repair Instructions >> Exhaust Manifold Replacement - Left >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2004 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Generator Fuel Rail Cover
    GM651873Courtesy of GENERAL MOTORS CORP.
  1. Remove the fuel rail cover.
  2. Remove the generator. Refer to Generator Replacement in Engine Electrical.
  3. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
    4. Fig 2: Exhaust Manifold & Nuts
    GM676192Courtesy of GENERAL MOTORS CORP.
  4. Remove the exhaust manifold nuts.
    5. Fig 3: Oxygen Sensor Electrical Connector
    GM53269Courtesy of GENERAL MOTORS CORP.
  5. Remove the connector position assurance (CPA) lock.
  6. Disconnect the oxygen sensor electrical connector.
  7. Remove the oxygen sensor connector clip at the body.
    NOTE: Refer to Oxygen Sensor Notice in Cautions and Notices.
  8. Remove the oxygen sensor.
  9. Lower the vehicle.
    10. Fig 4: AIR Pipe Hose & Hose Clamp
    GM651891Courtesy of GENERAL MOTORS CORP.
  10. Remove the hose clamp at the secondary air injection (AIR) pipe.
  11. Remove the AIR hose from the AIR pipe.
    12. Fig 5: Right/Left Check Valve, AIR Injection Pipe Hose & AIR Pipe
    GM651875Courtesy of GENERAL MOTORS CORP.
  12. Remove the hose clamps at the right and left check valves.
  13. Remove the AIR injection pipe hose (1) from the right check valve.
  14. Remove the AIR injection pipe hose (3) from the left check valve.
  15. Remove the AIR pipe (2).
    16. Fig 6: AIR Pipe, Gasket & Bolts
    GM651876Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Do not remove the check valve from the AIR pipe unless valve service is required.
  16. Remove the AIR pipe bolts.
  17. Remove the AIR pipe and gasket. Discard the old gasket
    18. Fig 7: Identifying Vacuum Booster Hose
    GM63936Courtesy of GENERAL MOTORS CORP.
  18. Remove the brake booster vacuum hose from the brake booster.
    19. Fig 8: Left Ignition Coil Bracket & Studs
    GM697215Courtesy of GENERAL MOTORS CORP.
  19. Remove the ignition coil bracket studs.
  20. Remove the ignition coil bracket.
  21. Remove the spark plugs. Refer to Spark Plug Replacement in Engine Controls - 5.7 L.
    22. Fig 9: Left Exhaust Manifold, Bolts & Gasket
    GM639834Courtesy of GENERAL MOTORS CORP.
  22. Remove the exhaust manifold bolts.
  23. Remove the exhaust manifold, and old gasket. Discard the gasket.
  24. If necessary, remove the exhaust manifold heat shield bolts and shield.
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