GM Service Manual Online
For 1990-2009 cars only

Crankshaft Rear Oil Seal Installation 6.2L LS9

Special Tools

J 41479 Crankshaft Rear Oil Seal Installer


    Object Number: 1699207  Size: SH

    Note: For proper orientation, note the installation direction of the oil seal. The oil seal is a reverse-lip design. The part number is applied to the outside face of the seal, as shown.

  1. Inspect the seal and identify the part number markings for proper orientation.

  2. Object Number: 2054381  Size: SH
  3. Install the J 41479-2B cone (2) and bolts onto the rear of the crankshaft.
  4. Tighten the bolts until snug. Do not overtighten.
  5. Install the rear oil seal onto the tapered cone (2) and push the seal to the rear seal bore. Install the oil seal with the part number markings facing away from the engine.
  6. Thread the J 41479 Installer threaded rod into the J 41479-2B tapered cone until the tool (1) contacts the oil seal.
  7. Align the oil seal onto the tool (1).
  8. Rotate the handle of the tool (1) clockwise until the seal enters the rear housing and bottoms into the seal bore.
  9. Remove the tool.

Crankshaft Rear Oil Seal Installation 6.2L LS3

Special Tools

    • J 41479 Crankshaft Rear Oil Seal Installer
    • J 41479-2A Crankshaft Rear Oil Seal Installation Guide

For equivalent regional tools, refer to Special Tools


    Object Number: 1699207  Size: SH

    Note: For proper orientation, note the installation direction of the oil seal. The oil seal is a reverse-lip design. The part number is applied to the outside face of the seal, as shown.

  1. Inspect the seal and identify the part number markings for proper orientation.

  2. Object Number: 63200  Size: SH
  3. Install the J 41479 installer or the J 41479-2A guide cone (2) and bolts onto the rear of the crankshaft. The J 41479-2A guide may be required for manual transmission or 5.3L LS4 applications.
  4. Tighten the bolts until snug. Do not overtighten.
  5. Install the rear oil seal onto the tapered cone (2) and push the seal to the rear seal bore. Install the oil seal with the part number markings facing away from the engine.
  6. Thread the J 41479 installer threaded rod into the tapered cone until the tool (1) contacts the oil seal.
  7. Align the oil seal onto the tool (1).
  8. Rotate the handle of the tool (1) clockwise until the seal enters the rear housing and bottoms into the seal bore.
  9. Remove the tool.