GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2007 🢒 Sierra Classic - 4WD 🢒 Engine 🢒 Engine Mechanical - 4.8L, 5.3L, and 6.0L 🢒 Crankshaft Rear Oil Seal Installation

Crankshaft Rear Oil Seal Installation without RPO HP2

Tools Required

J 41479 Crankshaft Rear Oil Seal Installer


    Object Number: 1699207 Size: SH

    Important: Note the installation direction of the oil seal. The new design oil seal is a reverse-lip type seal. For proper orientation, THIS SIDE OUT has been marked on the seal, as shown.

  1. Lubricate the outside diameter (OD) and inside diameter (ID) of the oil seal with clean engine oil.
  2. Inspect the seal and identify the THIS SIDE OUT markings for proper orientation.

    3. Object Number: 1272844 Size: SH
  3. Lubricate the rear housing oil seal bore with clean engine oil.

    4. Object Number: 63200 Size: SH
  4. Install the J 41479 cone (2) and bolts onto the rear of the crankshaft.
  5. Tighten the bolts until snug. Do not overtighten.
  6. 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 markings THIS SIDE OUT facing away from the engine.
  7. Thread the J 41479 threaded rod into the tapered cone until the tool (1) contacts the oil seal.
  8. Align the oil seal onto the tool (1).
  9. Rotate the handle of the tool (1) clockwise until the seal enters the rear housing and bottoms into the seal bore.
  10. Remove the tool.

Crankshaft Rear Oil Seal Installation RPO HP2

Tools Required

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

    Object Number: 1699207 Size: SH

    Important: Note the installation direction of the oil seal. The new design oil seal is a reverse-lip type seal. For proper orientation, THIS SIDE OUT has been marked on the seal, as shown.

  1. Lubricate the outside diameter (OD) and inside diameter (ID) of the oil seal with clean engine oil.
  2. Inspect the seal and identify the THIS SIDE OUT markings for proper orientation.

    3. Object Number: 1272844 Size: SH
  3. Lubricate the rear housing oil seal (141) bore with clean engine oil.

    4. Object Number: 1201554 Size: SH
  4. Install the J 41479-2A  (2) and bolts onto the rear of the crankshaft.
  5. Tighten the bolts until snug. Do not overtighten.
  6. Install the rear oil seal onto the J 41479-2A and push the seal to the rear cover bore.
  7. Thread the J 41479  (1) threaded rod into the J 41479-2A  (2) until the tool contacts the oil seal.
  8. Align the oil seal to the J 41479  (1).
  9. Rotate the handle of the J 41479  (1) clockwise until the seal enters the rear cover and bottoms into the cover bore.
  10. Remove the tools.