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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 10 (Engine Mechanical - 8.1L) >> Repair Instructions >> Off-Vehicle Repair Instructions >> Crankshaft Rear Oil Seal Installation >> Tools Required

Tools Required

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J 42849  Crankshaft Rear Seal Installer. See Special Tools .

IMPORTANT: Crankshaft rear oil seal and engine flywheel installation requires adequate space for installation. If the engine stand does not allow suitable space to use the J 42849  , install the crankshaft rear oil seal and engine flywheel with the engine properly supported on the floor. See Special Tools .
    Fig 1: View Of J 42849
    GM640011Courtesy of GENERAL MOTORS CORP.
  1. Make sure the crankshaft rear chamfer is free of grit, loose rust, and burrs. Correct as needed.
  2. Apply a very light film of oil onto the crankshaft sealing surface.

    DO NOT apply oil to the sealing surface of the engine block.

  3. Install the seal on the J 42849  . See Special Tools .
  4. Position J 42849  against the crankshaft. See Special Tools . Thread the attaching screws into the tapped holes in the crankshaft.
  5. Tighten the screws securely with a screwdriver in order to ensure that the seal is installed squarely over the crankshaft.
  6. Rotate the center nut until the J 42849  bottoms. See Special Tools .
  7. Remove the J 42849  . See Special Tools .
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