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Home >> Buick >> 2007 >> Lucerne CX >> Repair and Diagnosis >> External Pages >> Different car >> Section 203 (Engine Mechanical - 3.5L) >> Repair Instructions >> On-Vehicle Repair Instructions >> Crankshaft Rear Oil Seal Replacement >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2006 Pontiac Montana SV6, 2006 Chevrolet Uplander, and 2006 Buick Terraza. However, it is still accessible from the selected car via links, so may be relevant.
    IMPORTANT: Note the direction of the rear oil seal. The new design seal is a reverse style as opposed to what has been used in the past. "THIS SIDE OUT" has been stamped into the seal, as shown in the graphic.
    IMPORTANT: Do not apply or use any oil lubrication on the crankshaft rear oil seal or the seal installer J 34686  . See Special Tools . Do not touch the sealing lip of the oil seal once the protective sleeve is removed. Doing so will damage/deform the seal.
    Clean the crankshaft sealing surface with a clean, lint free towel. Inspect lead in edge of crankshaft for burrs/sharp edges that could damage the rear main oil seal. Remove burrs/sharp edges with a crocus cloth before proceeding.
    Fig 1: Installing Crankshaft Rear Oil Seal
    GM1537548Courtesy of GENERAL MOTORS CORP.
  1. Carefully remove the protection sleeve from the new crankshaft rear oil seal.
  2. Install the crankshaft rear oil seal into the J 34686  by sliding the crankshaft rear oil seal over the mandrel using a twisting motion until the back of the crankshaft rear oil seal bottoms squarely against the collar of the tool. See Special Tools .
  3. Install the J 34686  onto the rear of the crankshaft. See Special Tools . Hand tighten the screws in order to ensure the seal will be installed squarely over the crankshaft.
  4. Install the crankshaft rear oil seal to the crankshaft.
  5. Tighten the wing nut on the J 34686  until it bottoms. See Special Tools .
  6. Remove the J 34686  from the crankshaft. See Special Tools .
  7. Install the engine flywheel. Refer to Engine Flywheel Replacement .