Installation Procedure

WARNING: This page is about a different car, the 2006 Pontiac Montana SV6, 2006 Chevrolet Uplander, and 2006 Buick Terraza. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying Crankshaft Rear Oil Seal Installation Tools (EN-48108)

Courtesy of GENERAL MOTORS CORP.

The EN-48108 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 the installation, review the above illustration to become familiar with the following components:
- Mandrel (1)
- Drive Drum (2)
- Drive Nut (3)
- Washer (4)
- Bearing (5)

Fig 2: Aligning Mandrel

Courtesy of GENERAL MOTORS CORP.

Align the mandrel dowel pin to the dowel pin hole in the crankshaft.

Fig 3: Identifying Mandrel Screws

Courtesy of GENERAL MOTORS CORP.

Using a large flat-bladed screwdriver, tighten the 2 mandrel screws to the crankshaft, ensuring the mandrel is snug to the crankshaft hub.

Fig 4: Attaching Seal To Mandrel

Courtesy of GENERAL MOTORS CORP.

Install the rear main seal (1), with the protective nylon sleeve attached, onto the mandrel
Install the outer drive drum onto the mandrel.
Install the bearing, washer and the drive nut onto the threaded shaft.

Fig 5: Pressing Seal Into Bore

Courtesy of GENERAL MOTORS CORP.

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

Fig 6: Identifying Mandrel Screws

Courtesy of GENERAL MOTORS CORP.

Use a flat-bladed screwdriver to remove the 2 attachment screws from the mandrel and remove the mandrel from the crankshaft hub.