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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 855 (Engine Mechanical - 4.8L, 5.3L & 6.0L) >> Repair Instructions >> Off-Vehicle Repair Instructions >> Crankshaft Rear Oil Seal Installation

Crankshaft Rear Oil Seal Installation

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Tools Required 

J 41479  Crankshaft Rear Oil Seal Installer

Important: 

  1. Lubricate the outside diameter (OD) of the oil seal (1) with clean engine oil.

    DO NOT allow oil or other lubricants to contact the seal surface.

  2. Lubricate the rear cover oil seal bore with clean engine oil.

    DO NOT allow oil or other lubricants to contact the crankshaft surface.

    Fig 1: Lubricating OD Of Oil Seal With Clean Engine Oil
    G02116935Courtesy of GENERAL MOTORS CORP.
  3. Install the J 41479  cone (2) and bolts onto the rear of the crankshaft.
  4. Tighten the bolts until snug. Do not overtighten.
  5. Install the rear oil seal onto the tapered cone (2) and push the seal to the rear cover bore.
  6. Thread the J 41479  threaded rod into the tapered cone until the tool (1) contacts the oil seal.
  7. Align the oil seal onto the tool (1).
  8. Rotate the handle of the tool (1) clockwise until the seal enters the rear cover and bottoms into the cover bore.
  9. Remove the tool.
    Fig 2: Installing J 41479 Cone & Bolts Onto Rear Of Crankshaft
    G02116936Courtesy of GENERAL MOTORS CORP.