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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 Rear Oil Seal Replacement >> Removal Procedure

Removal 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. Remove the engine flywheel. Refer to Engine Flywheel Replacement .

    Important:  Rear crankshaft seal removal cannot be performed on an engine stand. If the engine is out of the vehicle, properly support the engine on a bench or on the floor. If the engine is in the vehicle the seal can be removed after the transaxle and engine flywheel are removed.

  2. Place the J 42841  onto the crankshaft.
  3. Install the J 42841  retaining bolts.
    Fig 1: Identifying J 42841
    G01816938Courtesy of GENERAL MOTORS CORP.
  4. Using a drill motor (variable speed preferred) with a socket adapter, install 8 one-inch self-drilling screws into the seal using the guide holes in the removal tool. When drilling, make sure you reduce the drill speed when the screw begins threading into the seal.
    Fig 2: Installing J 42841
    G01816939Courtesy of GENERAL MOTORS CORP.
  5. With all 8 removal screws installed, remove the J 42841  retaining bolts.
    Fig 3: Removing J 42841 Retaining Bolts
    G01816940Courtesy of GENERAL MOTORS CORP.
  6. Install the center forcing screw.
    Fig 4: Installing Center Forcing Screw
    G01816941Courtesy of GENERAL MOTORS CORP.
  7. Tighten the center screw on the removal tool to pull the seal assembly off the end of the crankshaft.
    Fig 5: Removing Rear Oil Seal Assembly
    G01816942Courtesy of GENERAL MOTORS CORP.
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