GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2002 🢒 Sonoma Pickup - 4WD 🢒 Engine 🢒 Engine Mechanical - 4.3L 🢒 Crankshaft Rear Oil Seal Housing Replacement

Removal Procedure

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

  1. Remove the oil pan. Refer to Oil Pan Replacement .
  2. Remove the transmission assembly.
    3. • Refer to Transmission Replacement in Automatic Transmission - 4L60-E.
    • Refer to Transmission Replacement in Manual Transmission - NV 3500.
  3. Remove the engine flywheel. Refer to Engine Flywheel Replacement .

    4. Object Number: 524317 Size: SH
  4. Remove the bolts and the nut holding the crankshaft rear oil seal housing to the engine.
  5. Remove the crankshaft rear oil seal housing.

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

Installation Procedure

    Object Number: 524322 Size: SH

    Important: When installing a NEW crankshaft rear oil seal housing the crankshaft rear oil 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 crankshaft rear oil seal housing gasket.

    2. Object Number: 524317 Size: SH
  2. Install the NEW crankshaft rear oil seal housing with the oil seal to the engine block using the following procedure.

    3.         Important: Do not oil or grease the seal lip or the crankshaft seal area.

    2.1. Leave the sleeve in the crankshaft rear oil seal and use the sleeve as a guide to ease the seal lip over the end of the crankshaft.
    2.2. Push the crankshaft rear oil seal housing fully onto the crankshaft until the crankshaft rear oil seal housing is against the crankshaft rear oil 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.

  3. Install the bolts and the nut to the crankshaft rear oil seal housing.

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

  4. Install the engine flywheel. Refer to Engine Flywheel Replacement .
  5. Install the transmission assembly.
    6. • Refer to Transmission Replacement in Automatic Transmission - 4L60-E.
    • Refer to Transmission Replacement in Manual Transmission - NV 3500.
  6. Install the oil pan. Refer to Oil Pan Replacement .