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HOMESERVICE MANUALSOLDSMOBILE2004BRAVADA AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1764 (ENGINE MECHANICAL - 4.2L)REPAIR INSTRUCTIONSOFF-VEHICLE REPAIR INSTRUCTIONSTHREAD REPAIRNOTES
2004 Oldsmobile Bravada AWD

Thread Repair: Notes

2004 Oldsmobile Bravada AWDSECTION Notes
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Tools Required

The thread repair process involves a solid, thin walled, self-locking, carbon steel, bushing type insert. During the insert installation process, the installation driver tool cold-rolls the bottom internal threads and expands the bottom external threads of the insert into the base material. This action mechanically locks the insert into place.

Fig 1: View Of J 42385-400 Tool Kit
GM613176Courtesy of GENERAL MOTORS CORP.

The tool kit J 42385-400  is designed for use with either a suitable tap wrench or drill motor. See Special Tools . Limited access and larger hole repair may process better using a tap wrench. An extension J 43965  may also be necessary to drive the thread repair tooling dependent on access to the hole being repaired. See Special Tools .

Fig 2: Drilled Hole Centerline
GM623356Courtesy of GENERAL MOTORS CORP.

It is critical that the drilling, counterboring and tapping of the hole to be repaired follows the same centerline as the original hole.

Fig 3: Identifying Proper Drilling Angle
GM623359Courtesy of GENERAL MOTORS CORP.

During the drilling and tapping of the hole being repaired ensure the tooling is consistently machining perpendicular to the surface of the base material.

Fig 4: View Of Tapping Guide
GM1447992Courtesy of GENERAL MOTORS CORP.

If the threaded hole being repaired has a base surface perpendicular to the hole centerline, tapping guides are available to aid in tapping the hole.

Thread Repair

Tap Size Tap Guide Tape Size Tape Guide Tap Size Tape Guide
- J 42385- - J 42385- - J 42385-
6 x 1.0 729 10 x 1.5 731 14 x 1.5 736
8 x 1.25 730 12 x 1.5 732 20 x 1.5 737
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.