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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1496 (Engine Mechanical - 5.3L) >> Repair Instructions >> On-Vehicle Repair Instructions >> Engine Rear Cover Replacement >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2003 GMC Envoy XL and 2003 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
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: Applying Bead Of Sealant To Oil Pan To Engine Block Junction
      G02129200Courtesy of GENERAL MOTORS CORP.
  1. Apply a 5 mm (0.20 in) bead of sealant GM P/N 12378190, or equivalent 20 mm (0.80 in) long to the oil pan to engine block junction.
  2. Install the rear cover gasket and cover.
  3. Install the rear cover bolts until snug. Do not overtighten.
    Fig 2: Installing Rear Cover Gasket And Cover
    G02129201Courtesy of GENERAL MOTORS CORP.
  4. Install the oil pan-to-rear cover bolts (1) until snug. Do not overtighten.
    Fig 3: Installing Oil Pan-To-Rear Cover Bolts
    G02129202Courtesy of GENERAL MOTORS CORP.
  5. Rotate the crankshaft until two 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.
    NOTE: Refer to FASTENER NOTICE in Cautions and Notices.
  7. Tighten the J 41476  mounting bolts until snug. Do not overtighten.

    Tighten 

    1. 7.1. Tighten the oil pan-to-rear cover bolts to 12 N.m (106 lb in).
    2. 7.2. Tighten the engine rear cover bolts to 25 N.m (18 lb ft).
  8. Remove the J 41476  .
    Fig 4: Installing J 41476 Tool And Bolts Onto Rear Of Crankshaft
    G02129203Courtesy of GENERAL MOTORS CORP.
  9. Install a NEW crankshaft rear oil seal. Refer to CRANKSHAFT REAR OIL SEAL REPLACEMENT   .
  10. Install the engine flywheel. Refer to ENGINE FLYWHEEL REPLACEMENT   .
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