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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 638 (Engine Mechanical - 4.0L (Unit Repair)) >> Repair Instructions >> Crankshaft Rear Oil Seal Removal >> Tools Required

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 42841  Crankshaft Rear Oil Seal Remover

Important:  Crankshaft rear oil seal removal requires adequate space for removal. Mount the engine on a suitable engine stand which will properly space the engine in order to use the J 42841  to remove the crankshaft rear oil seal. If necessary remove the crankshaft rear oil seal with the engine properly supported on the floor or on a bench.

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.

  1. Place the J 42841  onto the crankshaft.
  2. Install the J 42841  retaining bolts.
    Fig 1: Identifying J 42841
    G01815709Courtesy of GENERAL MOTORS CORP.
  3. Using a drill motor (variable speed preferred) with a socket adapter, install eight 25 mm (1.0 in) 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 4281
    G01815710Courtesy of GENERAL MOTORS CORP.
  4. With all 8 removal screws installed, remove the J 42841  retaining bolts.
    Fig 3: Removing J 4281 Retaining Bolts
    G01815711Courtesy of GENERAL MOTORS CORP.
  5. Install the center forcing screw.
    Fig 4: Installing Center Forcing Screw
    G01815712Courtesy of GENERAL MOTORS CORP.
  6. Tighten the center screw on the removal tool to pull the seal assembly off the end of the crankshaft.
    Fig 5: Pulling Seal Assembly Off Crankshaft
    G01815713Courtesy of GENERAL MOTORS CORP.