GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 1999 🢒 Century (China) (CNG) 🢒 Engine 🢒 Engine Mechanical - 3.0L (L46) 🢒 Crankshaft Rear Oil Seal Replacement

Removal Procedure
  1. Remove the transaxle. Refer to Transmission Replacement in Automatic Transaxle - 4T65-E.
  2. Remove the engine flywheel. Refer to Engine Flywheel Replacement .

    3. Object Number: 55077 Size: SH

    Important: Do not nick the crankshaft sealing surface when removing the seal.

  3. Remove the crankshaft rear oil seal.
    4. 3.1.  Insert a flat-bladed tool or similar tool through the dust lip at an angle.
    3.2. Pry the crankshaft rear oil seal out by moving the handle of the tool towards the end of the crankshaft.
    3.3. Repeat as necessary around the crankshaft rear oil seal.

Installation Procedure
  1. Install the rear main seal. Refer to Crankshaft Rear Oil Seal Installation .
  2. Install the engine flywheel. Refer to Engine Flywheel Replacement .
  3. Install the transaxle. Refer to Transmission Replacement in Automatic Transaxle - 4T65-E.