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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 >> Crankshaft Front Oil Seal 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 lubricate the oil seal sealing surface.
  • Do not reuse the crankshaft oil seal.
  1. Lubricate the outer edge of the oil seal (1) with clean engine oil.
  2. Lubricate the front cover oil seal bore with clean engine oil.
    Fig 1: Installing Crankshaft Front Oil Seal
    G02129190Courtesy of GENERAL MOTORS CORP.
  3. Install the crankshaft front oil seal onto the J 41478  guide.
  4. Install the J 41478  threaded rod (with nut, washer, guide, and oil seal) into the end of the crankshaft.
  5. Use the J 41478  in order to install the oil seal into the cover bore.
    1. 5.1. Use a wrench and hold the hex on the installer bolt.
    2. 5.2. Use a second wrench and rotate the installer nut clockwise until the seal bottoms in the cover bore.
    3. 5.3. Remove the J 41478  .
    4. 5.4. Inspect the oil seal for proper installation.

      The oil seal should be installed evenly and completely into the front cover bore.

      Fig 2: Installing Crankshaft Front Oil Seal Onto J 41478 Guide
      G02129191Courtesy of GENERAL MOTORS CORP.
  6. Install the crankshaft balancer. Refer to CRANKSHAFT BALANCER REPLACEMENT   .
  7. Install the radiator. Refer to RADIATOR REPLACEMENT (BODY VIN CODE 6)  or RADIATOR REPLACEMENT (BODY VIN TYPE 3)  in Engine Cooling.
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