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Tools Required

WARNING: This page is about a different car, the 2002 Oldsmobile Aurora and 2001 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.

J 42041  Crankshaft Balancer and Crankshaft Front Oil Seal Installer

Important:  Do not lubricate the crankshaft front oil seal or crankshaft balancer sealing surfaces. The crankshaft balancer is installed into a dry seal.

  1. Lubricate the crankshaft front oil seal bore of the engine front cover housing with lubricant GM P/N US 12345501, Canada 992704, or equivalent.
  2. Remove the protective sleeve from the new crankshaft front oil seal.
  3. Place the crankshaft front oil seal (1) onto the mandrel (J 42041-1) of the J 42041. 
    Fig 1: Identifying Crankshaft Front Oil Seal Bore Lubrication Area
    G01815503Courtesy of GENERAL MOTORS CORP.
  4. Thread the J 42041  in the crankshaft. Make sure you engage at least ten threads of the J 42041  before pressing the crankshaft front oil seal in place.
  5. Push the crankshaft front oil seal into position by tightening the nut on the J 42041  until the mandrel bottoms out on the crankshaft sprocket.
    Fig 2: Installing Crankshaft Oil Seal
    G01815504Courtesy of GENERAL MOTORS CORP.

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

  6. Check the installed depth (1) of the crankshaft front oil seal. The crankshaft front oil seal should protrude from the engine front cover about 1-2 mm (0.039-0078 in).
    Fig 3: Checking Crankshaft Front Oil Seal Depth
    G01815505Courtesy of GENERAL MOTORS CORP.
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