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Home >> Isuzu >> 2007 >> i-290 LS, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 78 (Engine Mechanical - 4.6L - 2 Of 4) >> On-Vehicle Repair Instructions (2 Of 2) >> Crankshaft Rear Oil Seal Replacement >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2007 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.
    IMPORTANT: The EN-48072  must be used to ensure even application of the sealant in the bore and to prevent blockage of the drain back hole. See Special Tools .
    IMPORTANT: Ensure components that are being sealed with RTV sealant are assembled within 20 minutes. Components assembled after the RTV sealant has skinned-over, approximately 20 minutes, will not bond properly.
    IMPORTANT: Although originally equipped with a lip-style crankshaft rear oil seal, engines built from March 1, 1996 and thru 1999 should use the cassette-style crankshaft rear oil seal.
    Fig 1: Checking Oil Seal Bore Depth
    GM1819460Courtesy of GENERAL MOTORS CORP.
  1. Ensure the engine block where the crankshaft rear oil seal is installed is a deep bore (1).
    • A deep bore of approximately 15 mm (0.5906 in) was used on engines from March 1, 1996 and later.
    • A shallow bore of approximately 8 mm (0.3150 in) was used on engines from 1993 thru February 29, 1996. This block would use a lip-style crankshaft rear oil seal and the J 38817-A  for installation.
    2. Fig 2: Identifying Rear Crankshaft Seal Bore & Flange
    GM1770170Courtesy of GENERAL MOTORS CORP.
  2. Inspect the engine block bore (1) and the crankshaft flange (2) for the damage. Repair or replace any damaged components.
    3. Fig 3: Identifying Rear Oil Seat Drain
    GM548463Courtesy of GENERAL MOTORS CORP.
  3. Ensure the oil drain-back hole is clear of debris using a wire or an unbound plastic tie wrap.
    4. Fig 4: Cleaning Rear Crankshaft Seal Bore
    GM1770172Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: In order to ensure proper bonding of the sealant the bore must be clean and dry.
  4. Clean the bore in the block with cleaner solvent GM P/N 12378392 or 12346139 (Canadian P/N 88901247).
    5. Fig 5: View Of J 45930-A Tool Set
    GM1770165Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Northstar engines 2005 and older have an 8 x 1.25 mm flywheel/flexplate crankshaft bolt hole thread. Northstar engines 2006 and later have an 11 x 1.5 mm flywheel/flexplate crankshaft bolt hole thread.
  5. Remove the proper sized bolts from the J 45930-A  . See Special Tools . Use the bolts (2) 8 mm or the bolts (3) 11 mm.
    6. Fig 6: Identifying Rear Seal Pilot Base
    GM1770176Courtesy of GENERAL MOTORS CORP.
  6. Install the EN-48072  pilot base onto the crankshaft. See Special Tools . The hub on the crankshaft will fit into the recess on the inboard side of the EN-48072  pilot base. See Special Tools .
    7. Fig 7: View Of Pilot Base Retainer Bolts
    GM1770179Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Northstar engines 2005 and older have an 8 x 1.25 mm flywheel/flexplate crankshaft bolt hole thread. Northstar engines 2006 and later have an 11 x 1.5 mm flywheel/flexplate crankshaft bolt hole thread.
  7. Use the proper bolts from the J 45930-A  to retain the EN-48072  pilot base in place. See Special Tools .
    8. Fig 8: View Of Rear Seal Applicator Housing
    GM1770182Courtesy of GENERAL MOTORS CORP.
  8. Install the EN-48072  applicator housing over the EN-48072  pilot base. See Special Tools . Ensure the EN-48072  applicator housing bottoms in the bore of the block. See Special Tools .
    9. Fig 9: Applying Sealant To Rear Seal Applicator Housing
    GM1770186Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: The sealant must not block the drain back hole. Blockage of the drain back hole can lead to oil leakage.
  9. Apply the sealant GM P/N 12378521 (Canadian P/N 88901148) to the bore outer diameter in the block. Ensure the sealant does not block the drain hole.
    10. Fig 10: Spreading Sealant To Rear Seal Applicator Housing
    GM1770190Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Apply steady even pressure to the EN-48072  applicator housing. See Special Tools .
  10. Using a suitable tool spread the sealant within the bore to ensure an even coating across the bore.
    11. Fig 11: Removing Rear Seal Applicator Housing
    GM1770192Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: In order to apply an even coat of the sealant do not twist or turn the EN-48072  applicator housing as it is pulled away from the bottom of the bore. See Special Tools .
  11. Using both hands, slowly and evenly, pull the EN-48072  applicator housing out of the bore and remove it from the EN-48072  pilot base. See Special Tools .
    12. Fig 12: Identifying Pilot Base Retainer Bolts
    GM1770195Courtesy of GENERAL MOTORS CORP.
  12. Remove the J 45930-A  bolts from the EN-48072  pilot base. See Special Tools .
    13. Fig 13: View Of Rear Seal Pilot Base
    GM1770199Courtesy of GENERAL MOTORS CORP.
  13. Remove the EN-48072  pilot base. See Special Tools .
    14. Fig 14: Spreading Sealant Across Bore Of Block
    GM1770202Courtesy of GENERAL MOTORS CORP.
  14. Ensure that the sealant (1) is evenly spread across the bore of the block.
    15. Fig 15: Checking Seal Bore Drain Back Hole
    GM1770206Courtesy of GENERAL MOTORS CORP.
  15. Ensure the drain back hole (1) is clear of the sealant.
    16. Fig 16: View Of J 45930-A Tool Set
    GM1770165Courtesy of GENERAL MOTORS CORP.
    IMPORTANT:
    • Beginning with the model year 2006 the flywheel/flexplate crankshaft bolt hole thread was changed from 8 x 1.25 mm to 11 x 1.5 mm. The J 45930-A  will service the cassette seals installed on engines from March 1, 1996 to 2006. If a J 45930 is to be used on a 2006 or later engine the update kit, J 45930-10, must be used to convert the J 45930 to a J 45930-A  .
    • Crankshaft rear oil seal and engine flywheel installation requires adequate space for installation. If the engine stand does not allow suitable space to use the J 45930-A  install the crankshaft rear oil seal and engine flywheel with the engine properly supported on the floor or on a bench.
    • Northstar engines 2005 and older have an 8 x 1.25 mm flywheel/flexplate crankshaft bolt hole thread. Northstar engines 2006 and later have an 11 x 1.5 mm flywheel/flexplate crankshaft bolt hole thread.
  16. Ensure the proper size of bolt (2) 8 mm or (3) 11 mm is being installed in the J 45930-A  .
    17. Fig 17: View Of J 45930-A Crankshaft Rear Oil Seal Installer
    GM1774753Courtesy of GENERAL MOTORS CORP.
  17. Turn the center nut (1) of theJ 45930-A  until the center hub (2) protrudes approximately 15 mm (0. See Special Tools .591 in) beyond the outer plate (3).
    18. Fig 18: View Of Crankshaft Rear Oil Seal
    GM1774755Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: DO NOT use any lubricant in order to install the crankshaft rear oil seal. Do not use any lubricant on the coating pre-applied to the inner diameter of the crankshaft rear oil seal. The coating is a sealant that must not be contaminated. Do not use any lubricant on the outer diameter of the crankshaft rear oil seal. The sealant applied to the bore of the engine block will not properly bond to a lubricated crankshaft rear oil seal.
  18. Do not lubricate any part of the new cassette style crankshaft rear oil seal.
    19. Fig 19: Positioning Rear Seal Onto J 45930-A Crankshaft Rear Oil Seal Installer
    GM1774759Courtesy of GENERAL MOTORS CORP.
  19. Install the new cassette style crankshaft rear oil seal onto the center hub of the J 45930-A  . See Special Tools .
    20. Fig 20: Threading J 45930-A Amounting Bolts Into Crankshaft
    GM1774762Courtesy of GENERAL MOTORS CORP.
  20. Thread the two J 45930-A  mounting bolts into the crankshaft flywheel bolt holes. See Special Tools .
    21. Fig 21: Checking Seal Installer Tightness
    GM1774764Courtesy of GENERAL MOTORS CORP.
  21. Tighten the two mounting bolts until the J 45930-A  is firmly mounted on the crankshaft. See Special Tools .
    22. Fig 22: Installing Crankshaft Rear Seal
    GM1774766Courtesy of GENERAL MOTORS CORP.
  22. Install the new cassette style crankshaft rear oil seal by turning the nut of the J 45930-A  until the drive portion of the J 45930-A  bottoms against the crankcase. See Special Tools .
    23. Fig 23: Loosening Seal Installer Center Nut
    GM1774768Courtesy of GENERAL MOTORS CORP.
  23. Loosen the center nut to release pressure on the crankcase.
    24. Fig 24: Loosening Seal Installer Mounting Bolts
    GM1774770Courtesy of GENERAL MOTORS CORP.
  24. Loosen the two mounting bolts.
    25. Fig 25: Removing J 45930-A Seal Installer
    GM1774772Courtesy of GENERAL MOTORS CORP.
  25. Remove the J 45930-A  from the crankshaft. See Special Tools .
  26. Wipe off any excessive sealant from the block.
    27. Fig 26: View Of Crankshaft Rear Oil Seal
    GM1774773Courtesy of GENERAL MOTORS CORP.
  27. Ensure the new cassette style crankshaft rear oil seal is installed properly.
    • The outer surface of the seal (3) should be 0.500-0.800 mm (0.0197-0.0315 in) (1) below the surface of the engine block (2).
    • The inner surface of the sleeve (6) should be 0.400-0.900 mm (0.0158-0.0354 in) (4) below the surface of the outer surface of the seal (5).
    • The installed seal and sleeve need to be parallel to the block by 0.000-0.500 mm (0.000-0.0197 in).
  28. Clean all tools to remove any residual sealant.
  29. Install the flywheel. Refer to Engine Flywheel Replacement .
  30. Install the transaxle. Refer to Transmission Replacement .
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