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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 414 (Engine Mechanical - 4.8L, 5.3L, & 6.0L (Unit Repair)) >> Repair Instructions >> Crankshaft Front Oil Seal Installation

Crankshaft Front Oil Seal Installation

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Tools Required 

J 41478  Crankshaft Front Oil Seal Installer

IMPORTANT: Do not lubricate the oil seal sealing surface.

Do not reuse the crankshaft front 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: Engine Front Cover Oil Seal
    G01674920Courtesy 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 tool.
    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: Using J 41478 To Install The Oil Seal Into The Cover Bore
    G01674921Courtesy of GENERAL MOTORS CORP.
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