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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1023 (Engine Mechanical - 6.6L (Lb7) (Repair Instructions 1 Of 4)) >> Repair Instructions (On-Vehicle & Off Vehicle - Part 1) >> On-Vehicle Repair Instructions >> Engine Flywheel Housing Replacement >> Removal Procedure

Removal 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. Drain the cooling system. Refer to Draining and Filling Cooling System (without HP2) in Engine Cooling.
  2. Remove the starter. Refer to Starter Motor Replacement (6.6L (LB7) Engine) in Engine Electrical.
  3. Remove the crankshaft rear oil seal. Refer to Crankshaft Rear Oil Seal Replacement .
  4. Remove the turbocharger oil return pipe nuts from the top of the flywheel housing.
    5. Fig 1: View Of Turbocharger Oil Return Pipe Nuts
    GM660327Courtesy of GENERAL MOTORS CORP.
  5. Remove the oil filter.
    IMPORTANT: The flywheel housing has dowels that protrude into the upper oil pan and engine block. The upper oil pan requires removal for proper installation of the flywheel housing.
    6. Fig 2: View Of Oil Filter
    GM660299Courtesy of GENERAL MOTORS CORP.
  6. Remove the upper oil pan. Refer to Oil Pan Replacement - Upper .
  7. Remove the engine rear cover bolts, denoted by the black circles.
    8. Fig 3: View Of Engine Rear Cover Bolts & Flywheel Housing To Upper Oil Pan Bolts
    GM660335Courtesy of GENERAL MOTORS CORP.
  8. Remove the oil cooler adapter to the engine flywheel housing nuts.
  9. Remove the oil cooler adapter to oil cooler bolts.
  10. Remove and discard the oil cooler adapter gaskets (1, 2).
    11. Fig 4: View Of Oil Cooler Adapter Gaskets
    GM663919Courtesy of GENERAL MOTORS CORP.
  11. Separate the flywheel housing from the cylinder block using J 37228  .
  12. Remove the engine rear cover.
  13. If required, clean and inspect the flywheel housing. Refer to Engine Flywheel Housing Cleaning and Inspection .
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