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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1054 (Engine Exhaust System) >> Repair Instructions >> Turbocharger Exhaust Pipe Replacement (6.6L (LB7) Engine) >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. From under the vehicle, position the turbocharger exhaust pipe to rear of the engine Do not install the pipe to the turbocharger.
    Fig 1: Turbocharger Exhaust Pipe (6.6L (LB7) Engine)
    GM786908Courtesy of GENERAL MOTORS CORP.
    2. Fig 2: View Of Right Exhaust Pipe To Exhaust Manifold & Turbocharger Bolts (6.6L (LB7) Engine)
    GM777476Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to Fastener Notice in Cautions and Notices.
  2. Install the right exhaust pipe with NEW gasket to the turbocharger. Align the tabs on the gasket to face inward.
  3. Install the exhaust pipe to turbocharger bolts (2).

    Tighten:  Tighten the bolts to 53 N.m (39 lb ft).

    4. Fig 3: Turbocharger Exhaust Pipe Bolts/Nuts (6.6L (LB7) Engine)
    GM654540Courtesy of GENERAL MOTORS CORP.
  4. Install the turbocharger exhaust pipe with a NEW gasket to the turbocharger.
  5. Install the turbocharger exhaust pipe bolts/nuts.

    Tighten:  Tighten the bolts/nuts to 53 N.m (39 lb ft).

    6. Fig 4: Heat Shield To The Exhaust Outlet Bolts (6.6L (LB7) Engine)
    GM668425Courtesy of GENERAL MOTORS CORP.
  6. Install the turbocharger exhaust pipe heat shield.
  7. Install the upper turbocharger exhaust pipe heat shield bolts (1, 3).

    Tighten:  Tighten the bolts to 8 N.m (71 lb in).

    8. Fig 5: Turbocharger Heat Shield (6.6L (LB7) Engine)
    GM660382Courtesy of GENERAL MOTORS CORP.
  8. Install the turbocharger heat shield.
  9. Install the turbocharger heat shield bolts.

    Tighten:  Tighten the bolts to 9 N.m (80 lb in).

    10. Fig 6: Heat Shield To The Exhaust Outlet Bolts (6.6L (LB7) Engine)
    GM668425Courtesy of GENERAL MOTORS CORP.
  10. Raise the vehicle.
  11. Install the lower turbocharger exhaust pipe heat shield bolt (2).

    Tighten:  Tighten the bolt to 8 N.m (71 lb in).

    12. Fig 7: View Of Fill Tube To Bellhousing Nuts
    GM702776Courtesy of GENERAL MOTORS CORP.
  12. If equipped with an automatic transmission, install the transmission fluid fill tube to bell housing nuts.

    Tighten:  Tighten the nuts 18 N.m (13 lb ft).

    13. Fig 8: View Of Right Exhaust Pipe To Exhaust Manifold & Turbocharger Bolts (6.6L (LB7) Engine)
    GM777476Courtesy of GENERAL MOTORS CORP.
  13. Install the right exhaust pipe to the exhaust manifold with a NEW gasket. Align the tab on the gasket to face outward as shown.
  14. Install the right exhaust pipe to exhaust manifold bolts (1).

    Tighten:  Tighten the bolts to 53 N.m (39 lb ft).

    15. Fig 9: Exhaust Manifold Pipe Hanger And Insulator (6.0L, 6.6L, and 8.1L Engines)
    GM694896Courtesy of GENERAL MOTORS CORP.
  15. Install the exhaust manifold pipe hanger in the insulator.
    16. Fig 10: Exhaust Muffler Nuts (6.0L, 6.6L, and 8.1L Engines)
    GM694338Courtesy of GENERAL MOTORS CORP.
  16. Install the exhaust muffler to the exhaust manifold pipe.
  17. Install the exhaust muffler nuts until snug.
    18. Fig 11: View Of Turbocharger Exhaust Pipe & Clamp
    GM668379Courtesy of GENERAL MOTORS CORP.
  18. Slide the exhaust pipe clamp down and around the pipe connection.
  19. Tighten the exhaust pipe clamp.

    Tighten: 

    • Tighten the clamp to 40 N.m (30 lb ft).
    • Tighten the nuts to 40 N.m (30 lb ft).

  20. Lower the vehicle.
    21. Fig 12: View Of Upper Intake Manifold Cover, Outlet Duct & Clamp
    GM813243Courtesy of GENERAL MOTORS CORP.
  21. Install the upper intake manifold sight shield.
  22. Install the upper intake manifold cover to the outlet duct.
  23. Tighten the outlet duct clamp at the upper intake manifold cover.

    Tighten:  Tighten the clamp to 6 N.m (53 lb in).

    24. Fig 13: Identifying Hood Hinge Normal And Service Position Bolt Holes
    GM310799Courtesy of GENERAL MOTORS CORP.
  24. Position the hood in the normal operating position by moving the hood hinge bolts from service position (2) to normal operating position (1).

    Tighten:  Tighten the bolts to 25 N.m (18 lb ft).

  25. Inspect for exhaust leaks.
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