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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 419 (Engine Mechanical - 3.5L (On-Vehicle)) >> Repair Instructions >> Crankshaft Front Oil Seal Replacement >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2002 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.
  1. Place the front seal (1) onto the mandrel of the installation tool.
    Fig 1: Identifying Front Seal
    G01816710Courtesy of GENERAL MOTORS CORP.
  2. Slide the mandrel onto the screw of the installation tool.
  3. Thread the J 42041  in the crankshaft. Make sure you engage at least ten threads of the J 42041  before pressing the seal in place.
    Fig 2: Identifying J 42041
    G01816711Courtesy of GENERAL MOTORS CORP.
  4. Push the seal into position by tightening the nut on the installation tool until the mandrel bottoms out on the crankshaft sprocket.
    Fig 3: Installing Front Oil Seal
    G01816712Courtesy of GENERAL MOTORS CORP.

    Important:  The seal should NOT be flush with the front cover.

  5. Check the installed depth of the seal (1). The seal should protrude 1-2 mm (0.039-0.078 in) from the front cover.
  6. Install the crankshaft balancer. Refer to Crankshaft Balancer Replacement .
    Fig 4: Checking Installed Seal Depth
    G01816713Courtesy of GENERAL MOTORS CORP.
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