Tools Required

EN-48672  Rear Main Oil Seal Remover

Fig 1: Identifying Rear Main Oil Seal Remover (EN-48672)

Courtesy of GENERAL MOTORS CORP.

The EN-48672  has a unique design to allow the technician to easily remove the rear main seal without nicking the crankshaft sealing surface when removing the seal. Before proceeding with removal, review the above illustration to become familiar with the following components:

1. Removal Plate
2. Threaded Adjustment Pins and Jam Nuts
3. Force Screw
4. #2 Self Drill Screws 38 mm (1.5 in) long 8 needed
5. Extreme Pressure Lubricant

1. Remove the transmission. Refer to Transmission Replacement .
2. Remove the engine flywheel. Refer to Engine Flywheel Replacement .
Fig 2: View Of Installed EN-48672 Removal Plate
Courtesy of GENERAL MOTORS CORP.
3. Install the removal plate (2) and both threaded adjustment pins and jam nuts (1) into the back of the crankshaft flange and secure the plate with adjustment pins and jam nuts.
Fig 3: View Of 8 Installed EN-48672 #2 Self Drill Screws
Courtesy of GENERAL MOTORS CORP.
4. Install the #2 self drill screws 38 mm (1.5 in) long, 8 needed (1) and tighten the screws down flush to the plate.
Fig 4: View Of Installed EN-48672 Force Screw & Jam Nuts
Courtesy of GENERAL MOTORS CORP.
IMPORTANT: Before installing the force screw, apply a small amount of the extreme pressure lubricant J 23444-A, provided in the tool kit.
5. Install the force screw (1) and back off both jam nuts (2). Continue to turn the force screw (1) into the removal plate in order to remove the seal from the crankshaft.
Fig 5: Oil Seal & EN-48672
Courtesy of GENERAL MOTORS CORP.
6. Once the seal is removed from the crankshaft, remove and save all 8 screws. Discard the old seal.