GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

Important: Do not remove the crankshaft rear oil seal housing if only replacing the crankshaft rear oil seal.


    Object Number: 1877081  Size: SH
  1. Remove the oil pan. Refer to Oil Pan Replacement .
  2. Remove the engine flywheel. Refer to Engine Flywheel Replacement .
  3. Remove the housing bolts and nut.
  4. Remove the housing.

  5. Object Number: 524322  Size: SH
  6. Remove and discard the housing gasket.
  7. Clean all the sealing surfaces.
  8. Inspect and replace the housing for warping, cracks, wear, or damage.

Installation Procedure


    Object Number: 524322  Size: SH

    Important: When installing a NEW housing the seal will come with the housing. If reusing the housing and then installing a NEW seal follow the instructions for installing the housing and than refer to Crankshaft Rear Oil Seal Replacement to install the seal.

  1. Install a NEW housing gasket.

  2. Object Number: 1877081  Size: SH
  3. Install the NEW housing with the seal using the following procedure.
  4.         Important: Do not oil or grease the seal lip or the crankshaft seal area.

    2.1. Leave the sleeve in the seal and use the sleeve as a guide to ease installing the seal lip over the end of the crankshaft.
    2.2. Push the housing fully onto the crankshaft until the housing is against the seal gasket and the engine.
    2.3. Remove the sleeve.

    Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  5. Install the crankshaft rear oil seal housing bolts and nut.
  6. Tighten
    Tighten the bolts and nut to 12 N·m (106 lb in).

  7. Install the engine flywheel. Refer to Engine Flywheel Replacement .
  8. Install the oil pan. Refer to Oil Pan Replacement .