Tools Required

CH-48106  Suspension Thread Repair Kit. See Special Tools .

The suspension thread repair Procedure involves a solid, thin-walled, key-locking, stainless steel keysert. Use the keysert when the parent material of the original threaded insert is damaged.

Fig 1: Installing Extracting Tool
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1. Install the CH-48106-1 extracting tool (1) into the damaged wire insert.
2. Set the extracting tool by lightly tapping the tool with a mallet.
3. Remove the wire insert by turning the tool counter-clockwise, while applying light forward pressure on the tool.
Fig 2: Drilling Out Threads
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4. Use the CH-48106-2 12.8 mm drill bit to drill out the threads of the damaged hole. Drill to a minimum depth of 14.5 mm (3/8 in)
Fig 3: Cleaning Out Chips
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5. Use compressed air (1) to clean out any chips.
Fig 4: Countersinking
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IMPORTANT: The keysert will install more easily if you countersink the hole.
6. Use a CH-48106-3 chamfering tool or an oversize drill bit of 14.25 mm (3/8 in) to countersink the drilled-out hole.
Fig 5: Cleaning Out Chips
Courtesy of GENERAL MOTORS CORP.
7. Use compressed air (1) to clean out any chips.
8. Use CH-48106-8 cutting oil to lubricate the threads of the tap.
9. Install the CH-48106-6 tap socket or equivalent tool to the CH-48106-4 tap.
Fig 6: Tapping New Threads
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10. Use the CH-48106-4 M14-1.5 6H Tap (1) to tap new threads in the drilled hole. Tap the threads to a minimum depth of 13.5 mm (5/16 in).
Fig 7: Cleaning Out Chips
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11. Use compressed air (1) to clean out any chips.
Fig 8: Installing keysert Into Installation Tool
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12. Install the CH-48106-7 keysert into the slotted sections of the CH-48106-5 installation tool (1).
Fig 9: Installing Keysert In Tap Hole
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13. Use the CH-48106-5 installation tool to install the keysert in the tap hole slightly below the bottom of the countersunk surface (1).
14. Remove the CH-48106-5 installation tool from the keys. Rotate the tool so that the keys are aligned on the flat surface of the tool.
    IMPORTANT: The keys mechanically lock the keysert to the threaded parent material.
Fig 10: Driving In Keys
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15. Use a mallet to strike the top of the CH-48106-5 installation tool (1) as necessary to drive the keys into the threaded parent material until the keys are even or slightly below the surface.
Fig 11: Inspecting Keysert
Courtesy of GENERAL MOTORS CORP.
IMPORTANT: If necessary, add shims or washers to the suspension bolt to check the torque and flushness of the bolt.
16. Inspect the keysert (1) for proper installation into the hole.
17. Temporarily install the suspension bolt.

    Tighten:  Tighten the suspension bolt to 91 N.m(67 lb ft).

18. Verify that the suspension bolt is seated flush to the surface.