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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1670 (Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L - Repair Instructions - Off Vehicle (2 Of 3)) >> Crankshaft Rear Oil Seal Installation

Crankshaft Rear Oil Seal Installation

WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Special Tools

    Fig 1: Identifying Oil Seal
    GM1699207Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: For proper orientation, note the installation direction of the oil seal. The oil seal is a reverse-lip design. The part number is applied to the outside face of the seal, as shown.
  1. Inspect the seal and identify the part number markings for proper orientation.
    2. Fig 2: Installing Crankshaft Rear Oil Seal
    GM63200Courtesy of GENERAL MOTORS CORP.
  2. Install the J 41479  or the J 41479-2A  cone (2) and bolts onto the rear of the crankshaft. The J 41479-2A  may be required for manual transmission or 5.3L LS4 applications.
  3. Tighten the bolts until snug. Do not overtighten.
  4. Install the rear oil seal onto the tapered cone (2) and push the seal to the rear seal bore. Install the oil seal with the part number markings facing away from the engine.
  5. Thread the J 41479  threaded rod into the tapered cone until the tool (1) contacts the oil seal. See Special Tools .
  6. Align the oil seal onto the tool (1).
  7. Rotate the handle of the tool (1) clockwise until the seal enters the rear housing and bottoms into the seal bore.
  8. Remove the tool.
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