GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Saturn 🢒 2009 🢒 VUE - AWD 🢒 Engine 🢒 Engine Mechanical - 3.5L 🢒 Crankshaft Rear Oil Seal Installation

Special Tools

EN-48108 Rear Main Oil Seal Installer

For equivalent regional tools, refer to Tools and Equipment.


    Object Number: 1718322 Size: SH

    Caution: Do not remove protective nylon sleeve prior to installation. The rear main oil seal installation tool is designed to install the rear main seal with the protective sleeve in place. Never apply or use any oil, lubricants or sealing compounds on the crankshaft rear main oil seal.

    Caution: Clean the crankshaft sealing surface with a clean, lint-free towel. Inspect lead-in edge of crankshaft for burrs/sharp edges that could damage the rear main oil seal. Remove burrs/sharp edges with crocus cloth before proceeding.

  1. The EN-48108 installer tool has a unique design to allow the technician to easily install the rear main seal squarely to the correct depth and direction. Before proceeding with installation, review the above illustration to become familiar with the following components:
    2. • Mandrel (1)
    • Drive Drum (2)
    • Drive Nut (3)
    • Washer (4)
    • Bearing (5)

    Object Number: 1718335 Size: SH
  2. Align the mandrel dowel pin to the dowel pin hole in the crankshaft.

    3. Object Number: 1718337 Size: SH
  3. Using a large flat blade screwdriver, tighten the two mandrel screws to the crankshaft, ensuring the mandrel is snug to the crankshaft hub.

    4. Object Number: 1718338 Size: SH

    Note: The seal will only fit one way onto the mandrel, and if properly installed, will center on a step that protrudes from the center of the mandrel.

  4. Install the rear main seal (1), with the protective nylon sleeve attached (2), onto the mandrel.

    5. Object Number: 1718341 Size: SH
  5. Install the outer drive drum onto the mandrel.
  6. Install the bearing, washer, and the drive nut onto the threaded shaft.

    7. Object Number: 1718345 Size: SH
  7. Using a wrench, turn the drive nut on the mandrel, which will push the seal into the engine block bore.
  8. Turn the wrench until the drive drum is snug and flush against the engine block.
  9. Loosen and remove the drive nut, washer, bearing and drive drum. Discard the nylon plastic seal protector.
  10. Verify that the seal has seated properly.

    11. Object Number: 1718337 Size: SH
  11. Use a flat blade screwdriver to remove the two attachment screws from the mandrel and remove the mandrel from the crankshaft hub.