GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2003 🢒 GMC C Sierra - 2WD 🢒 Engine 🢒 Engine Mechanical - 6.6L 🢒 Crankshaft Rear Oil Seal Replacement

Special Tools

    • J 44641 Crankshaft Rear Oil Seal Remover
    • J 44642 Crankshaft Rear Oil Seal Installer

Removal Procedure

    Object Number: 660312 Size: SH
  1. Remove the flywheel. Refer to Engine Flywheel Replacement - Automatic Transmission or Engine Flywheel Replacement - Manual Transmission.
  2. Clean the area around the crankshaft rear oil seal.
  3. Install the button of J 44641 into the crankshaft.
  4. Press the jaws of J 44641 into the felt portion of the seal far enough to engage the inner lip of the seal.
  5. While holding the jaws to J 44641 tightly to the seals inner sleeve, tighten the jaw bolts.
  6. Remove the crankshaft rear oil seal using J 44641 .

Installation Procedure

    Object Number: 663925 Size: SH
  1. Clean the crankshaft of oil and dirt.
  2. Clean the seal bore in the flywheel housing.
  3. Place the crankshaft rear oil seal onto the crankshaft.

    4. Important: J 44642 must be fully secured to the crankshaft to ensure proper seal depth.

  4. Install J 44642 to the crankshaft.
  5. Press the crankshaft rear oil seal into position using J 44642 , the tool will bottom out when the seal reaches the proper depth.
  6. Remove J 44642 .
  7. Install the flywheel. Refer to Engine Flywheel Replacement - Automatic Transmission or Engine Flywheel Replacement - Manual Transmission.