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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1401 (Engine Mechanical - 6.6L (2 Of 5)) >> Repair Instructions - On Vehicle >> Flywheel Housing Replacement >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: View Of Flywheel Housing O-Ring Seals
    GM663771Courtesy of GENERAL MOTORS CORP.
  1. Install NEW O-ring seals to the flywheel housing, if necessary.
    2. Fig 2: View Of Engine Rear Cover Sealing Surfaces Sealant Application Area
    GM663922Courtesy of GENERAL MOTORS CORP.
  2. Apply a 2 mm (1/8 in) wide bead of sealant (3) to the flywheel housing sealing surfaces. Refer to Adhesives, Fluids, Lubricants, and Sealers for the correct part number.
    3. Fig 3: View Of Oil Cooler Adapter
    GM1334855Courtesy of GENERAL MOTORS CORP.
  3. Install a NEW oil cooler adapter gasket.
  4. Install a NEW oil cooler adapter to flywheel housing gasket.
  5. Install the oil cooler adapter to the flywheel housing.
    6. CAUTION: Refer to Fastener Caution .
  6. Install the oil cooler adapter bolts.

    Tighten:  Tighten the bolts/nuts to 21 N.m (15 lb ft).

    7. Fig 4: View Of Engine Rear Cover Bolts & Flywheel Housing To Upper Oil Pan Bolts
    GM660335Courtesy of GENERAL MOTORS CORP.
  7. Install the flywheel housing bolts, denoted by the black circles.

    Tighten:  Tighten the bolts to 90 N.m (67 lb ft).

    8. Fig 5: View Of Turbocharger Oil Return Pipe Nuts
    GM1334852Courtesy of GENERAL MOTORS CORP.
  8. Install the oil cooler adapter studs and nuts to the flywheel housing.

    Tighten: 

    • Tighten the oil cooler adapter studs to 10 N.m (89 lb in).
    • Tighten the oil cooler adapter nuts to 25 N.m (18 lb ft).

    9. Fig 6: View Of Oil Filter
    GM660299Courtesy of GENERAL MOTORS CORP.
  9. Install the oil filter.
  10. Install the upper oil pan. Refer to Upper Oil Pan Replacement .
  11. Install a NEW gasket to the turbocharger oil return pipe.
  12. Install the turbocharger oil return pipe to flywheel housing nuts.

    Tighten:  Tighten the nuts to 21 N.m (15 lb ft).

  13. Install the crankshaft rear oil seal. Refer to Crankshaft Rear Oil Seal Replacement .
  14. Fill the cooling system. Refer to Cooling System Draining and Filling (Vac-N-Fill) or Cooling System Draining and Filling (Static Fill) .
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