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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> ENGINE MECHANICAL - 4.8L, 5.3L, AND 6.0L (2 Of 4) >> On-Vehicle Repair Instructions >> Engine Rear Cover Replacement >> Installation Procedure

Installation Procedure

IMPORTANT:
  • Do not reuse the crankshaft oil seal or rear cover gasket.
  • Do not apply any type of sealant to the rear cover gasket, unless specified.
  • The special tool in this procedure is used to properly center the crankshaft rear oil seal.
  • The crankshaft rear oil seal will be installed after the rear cover has been installed and aligned.

    Install the rear cover without the crankshaft oil seal.

    • All gasket surfaces should be free of oil or other foreign material during assembly.
    • The crankshaft rear oil seal MUST be centered in relation to the crankshaft.
    • An improperly aligned rear cover may cause premature rear oil seal wear and/or engine assembly oil leaks.
    Fig 1: View Of Sealant Applied To Rear Oil Pan-To-Engine Block Junction
    GM451898Courtesy of GENERAL MOTORS CORP.
  1. Apply a 5 mm (0.2 in) bead of sealant GM P/N 12378190, or equivalent 20 mm (0.8 in) long to the oil pan to engine block junction.
    2. Fig 2: View Of Rear Cover, Bolts & Gasket
    GM64282Courtesy of GENERAL MOTORS CORP.
  2. Install the rear cover gasket and cover.
  3. Install the rear cover bolts until snug. Do not overtighten.
    4. Fig 3: View Of Oil Pan-To-Rear Cover Bolts
    GM680413Courtesy of GENERAL MOTORS CORP.
  4. Install the oil pan-to-rear cover bolts (1) until snug. Do not overtighten.
  5. Rotate the crankshaft until 2 opposing flywheel bolt holes are parallel to the oil pan surface.
    IMPORTANT: The tapered legs of the alignment tool must enter the rear cover oil seal bore.
  6. Install the J 41476  and bolts onto the rear of the crankshaft. See Special Tools .
    Fig 4: View Of J 41476
    GM451716Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to Fastener Notice .
  7. Tighten the J 41476  mounting bolts until snug. See Special Tools . Do not overtighten.

    Tighten: 

    1. Tighten the oil pan-to-rear cover bolts to 12 N.m (106 lb in).
    2. Tighten the engine rear cover bolts to 25 N.m (18 lb ft).

  8. Remove the J 41476  . See Special Tools .
  9. Install a NEW crankshaft rear oil seal. Refer to Crankshaft Rear Oil Seal Replacement (4.8L, 5.3L, and 6.0L Engines)  or Crankshaft Rear Oil Seal Replacement (5.3L Engine w/RPO HP2) .
  10. Install the engine flywheel. Refer to Engine Flywheel Replacement .
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