GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Holden 🢒 2009 🢒 WM Sedan 🢒 Engine 🢒 Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L 🢒 Crankshaft Rear Oil Seal Installation

Crankshaft Rear Oil Seal Installation L98, LS2

Tools Required

J 41479 Crankshaft Rear Oil Seal Installer

    Important: 

       • Do not lubricate the oil seal (1) inside diameter (ID) of the crankshaft surface.
       • Do not reuse the crankshaft rear oil seal (1).


    Object Number: 1950880 Size: SH
  1. Lubricate the outside diameter (OD) of the oil seal (1) with clean engine oil.

    2. DO NOT allow oil or other lubricants to contact the seal surface.

  2. Lubricate the rear cover (2) oil seal bore with clean engine oil.

    3. DO NOT allow oil or other lubricants to contact the crankshaft surface.


    Object Number: 1950877 Size: SH
  3. Install the J 41479  (3) cone and bolts onto the rear of the crankshaft.

    4. Important:  Do not over tighten the bolts.

  4. Tighten the bolts.
  5. Install the rear oil seal (1) onto the J 41479  (3) and push the seal to the rear cover bore (2).
  6. Thread the J 41479  (3) threaded rod into the tapered cone until the J 41479  (3) contacts the rear oil seal (1).
  7. Align the rear oil seal (1) onto the J 41479  (3).
  8. Rotate the handle of the J 41479  (3) clockwise until the rear oil seal (1) enters and bottoms into the rear cover bore (2).
  9. Remove the J 41479  (3).

Crankshaft Rear Oil Seal Installation LS3

Special Tools

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

    Object Number: 1699207 Size: SH

    Important: 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
  2. Install the J 41479 or the J 41479-2A cone (2) and bolts onto the rear of the crankshaft. The J 41479-2A may be required for manual transmission or 5.3L LS4 applications.
  3. Tighten the bolts until snug. Do not overtighten.
  4. 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.
  5. Thread the J 41479 threaded rod into the tapered cone until the tool (1) contacts the oil seal.
  6. Align the oil seal onto the tool (1).
  7. Rotate the handle of the tool (1) clockwise until the seal enters the rear housing and bottoms into the seal bore.
  8. Remove the tool.