GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

  1. Remove the flywheel. Refer to Engine Flywheel Replacement .
  2. Remove the oil pan. Refer to Oil Pan Replacement .

  3. Object Number: 11479  Size: SH
  4. Remove the crankshaft rear oil seal housing nut and bolts.
  5. Remove the crankshaft rear oil seal housing with the assembled seal.
  6. Remove the gasket.
  7. Remove the crankshaft rear oil seal from the crankshaft rear oil seal housing.
  8. Clean the gasket surfaces.
  9. Remove the crankshaft rear oil seal from the crankshaft rear oil seal housing.
  10. Using the notches provided in the crankshaft rear oil seal housing, pry the oil seal out.

Installation Procedure

Tools Required

J 35621-A Crankshaft Rear Oil Seal Installer

    Important: Always use a new crankshaft rear oil seal and a new oil seal housing gasket during the installation of the crankshaft rear oil seal housing.

  1. Install the new oil seal housing gasket and the crankshaft rear oil seal housing on the studs.
  2. It is not necessary to use any type of sealant to hold the oil seal housing gasket in place.

  3. Object Number: 11479  Size: SH
  4. Install the crankshaft rear oil seal housing nuts and bolts.
  5. Tighten
    Tighten the crankshaft rear oil seal housing nuts and bolts to 15 N·m (11 lb ft).

    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.

  6. Inspect the oil pan gasket for damage. Replace the gasket if necessary.
  7. Install the oil pan. Refer to Oil Pan Replacement .
  8. Install the new crankshaft rear oil seal using the J 35621-A .
  9. Install the engine flywheel. Refer to Engine Flywheel Replacement .