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Home >> Pontiac >> 2009 >> Vibe Base, 2.4 0, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 164 (Engine Mechanical - 4.6L - Repair Instructions - Off Vehicle) >> Repair Instructions - Off Vehicle >> Thread Repair >> Crankshaft Main Bolt Hole Thread Repair

Crankshaft Main Bolt Hole Thread Repair

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Special Tools 

J 42385-2000 Thread Insert Kit

Fig 1: View Of Thread Insert Kit
GM626555Courtesy of GENERAL MOTORS COMPANY
NOTE:
  • In order to repair some crankshaft main bolt holes it will be necessary to mount the fixture plate upside down.
  • Do NOT remove the fixture plate prior to installing the insert with the installation driver. The fixture plate remains in position throughout the thread repair process.

The crankshaft main bearing bolt hole thread repair kit J 42385-2000 components consist of the following:

WARNING:

Refer to Safety Glasses Warning .

NOTE:
  • Ensure the fixture plate is installed during the machining and installation processes of the insert.
  • The use of a cutting type fluid GM P/N 1052864, (Canadian P/N 992881), WD 40® or equivalent is recommended when performing the drilling, counterboring and tapping procedures.

When installed to the proper depth, the flange of the insert will be seated against the counterbore of the drilled/tapped hole.

    Fig 2: View Of Fixture Plate & Components - Crankshaft Main Bolt Hole
    GM626556Courtesy of GENERAL MOTORS COMPANY
  1. Position the fixture plate (3) with the bushing (2), installed over the crankshaft main cap bolt hole to be repaired.
  2. Loosely install the fixture plate bolts (1) into the remaining crankshaft main cap bolt holes.
    3. Fig 3: Positioning Alignment Pin - Crankshaft Main Bolt Hole
    GM626557Courtesy of GENERAL MOTORS COMPANY
  3. Position the alignment pin (1) through the bushing and into the crankshaft main cap bolt hole.
  4. With the alignment pin in the desired crankshaft main cap bolt hole, tighten the fixture retaining bolts (2).
  5. Remove the alignment pin (1) from the crankshaft main cap bolt hole.
    6. Fig 4: Drilling Out Threads Of Damaged Hole - Crankshaft Main Bolt Hole
    GM626558Courtesy of GENERAL MOTORS COMPANY
    NOTE:
    • During the drilling process, it is necessary to repeatedly remove the drill and clean chips from the hole and the flutes of the drill.
    • Drill the crankshaft main bolt hole until the mark (1) on the drill aligns with the top of the drill bushing (2).
  6. Drill out the threads of the damaged hole.
    7. Fig 5: Cleaning Out Metal Chips
    GM623361Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    All chips must be removed from the drilled hole prior to tapping.

  7. Using compressed air, clean out any chips.
    8. Fig 6: Tapping Threads Using Tapping Wrench - Crankshaft Main Bolt Hole
    GM626560Courtesy of GENERAL MOTORS COMPANY
    NOTE:
    • Do not remove the fixture plate, ensure the fixture plate is installed during the machining and installation processes of the insert.
    • During the tapping process, it is necessary to repeatedly remove the tap and clean chips from the hole and the flutes of the tap.
    • Ensure the tap has created full threads at least to the depth equal to the insert length.
  8. Using a suitable tapping wrench, tap the threads of the drilled hole by hand only.
    9. Fig 7: View Of Fixture Plate, Drill Bushing & Tool Marking
    GM377635Courtesy of GENERAL MOTORS COMPANY
  9. In order to tap the new threads for the insert to the proper depth, rotate the tap into the crankshaft main cap bolt hole until the mark (3) on the tap aligns with the top of the drill bushing (2).
    10. Fig 8: Cleaning Out Metal Chips
    GM623361Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    All chips must be removed from the tapped hole prior to insert installation.

  10. Using compressed air, clean out any chips.
    11. Fig 9: Spraying Cleaner Into Tapped Hole
    GM623364Courtesy of GENERAL MOTORS COMPANY
  11. Spray cleaner GM P/N 12346139, GM P/N 12377981 (Canadian P/N 10953463) or equivalent into the tapped hole.
    12. Fig 10: Cleaning Out Metal Chips
    GM623361Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    All chips must be removed from the tapped hole prior to insert installation.

  12. Using compressed air, clean out any chips.
    13. Fig 11: Lubricating Installer Tool Using Driver Oil
    GM313562Courtesy of GENERAL MOTORS COMPANY
    NOTE:
    • Do not remove the fixture plate, ensure the fixture plate is installed during the installation process of the insert.
    • Do not allow oil or other foreign material to contact the OD of the insert.
  13. Lubricate the threads of the driver installation tool (2) with the driver oil J 42385-110 (1).
    14. Fig 12: View of Bushing Type Insert
    GM313567Courtesy of GENERAL MOTORS COMPANY
  14. Install the insert (2) onto the driver installation tool (1).
    15. Fig 13: Applying Threadlock To Insert
    GM313572Courtesy of GENERAL MOTORS COMPANY
  15. Apply threadlock sealant GM P/N 12345493, (Canadian P/N 10953488), J 42385-109, LOCTITE 277® or equivalent (1) to the insert OD threads (2).
    16. Fig 14: Installing Insert & Installation Driver - Crankshaft Main Bolt Hole
    GM626561Courtesy of GENERAL MOTORS COMPANY
  16. Install the insert and installation driver into the tapped hole by hand only.
  17. Start the insert into the threaded hole.
    18. NOTE:

    If the insert will not thread down until the flange contacts the counterbored surface remove the insert immediately with a screw extracting tool and inspect the tapped hole for any remaining chips and/or improper tapping.

  18. Install the insert until the flange of the insert contacts the counterbored surface.
    19. NOTE:

    The driver installation tool will tighten up before screwing completely through the insert. This is acceptable. The threads at the bottom of the insert are being formed and the insert is mechanically locking the insert into the base material threads.

  19. Continue to rotate the driver installation tool through the insert.
    20. Fig 15: View Of Fixture Plate, Drill Bushing & Tool Marking
    GM377635Courtesy of GENERAL MOTORS COMPANY
  20. Rotate the driver installation tool until the mark (3) on the driver installation tool aligns with the top of the drill bushing (2).
  21. Inspect the insert for proper installation into the tapped hole.
    22. Fig 16: View Of Fixture Plate & Components - Crankshaft Main Bolt Hole
    GM626556Courtesy of GENERAL MOTORS COMPANY
  22. Remove the fixture plate bolts (1).
  23. Remove the fixture plate (3) and bushing (2).
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