Hummer H3. Manual — part 230

20. Install the insert until the flange of the insert contacts the counterbored surface.

21. Continue to rotate the driver installation tool through the insert.

22. Inspect the insert for proper installation into the tapped hole.

Crankshaft Main Bolt Hole Thread Repair

remaining chips and/or improper tapping.

IMPORTANT: 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.

2006 Hummer H3

2006 ENGINE Engine Mechanical - 3.5L (L52) - H3

Fig. 540: View Of Crankshaft Main Bearing Bolt Hole Required Tools
Courtesy of GENERAL MOTORS CORP.

The crankshaft main bearing bolt hole required tools consist of the following:

IMPORTANT:

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.

2006 Hummer H3

2006 ENGINE Engine Mechanical - 3.5L (L52) - H3

Drill (1) J 42385-417

Tap (2) J 42385-418

Installation driver (3) J 42385-419

Fixture plate (4) J 42385-401

Bushing (5) J 42385-307

Alignment pin (6) J 42385-308

Bolts (7) J 42385-510

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

CAUTION: Refer to Safety Glasses Caution in Cautions and Notices.

IMPORTANT:

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 United States 1052864,
GM P/N Canada 992881, WD 40® or equivalent is
recommended when performing the drilling, counterboring
and tapping procedures.

2006 Hummer H3

2006 ENGINE Engine Mechanical - 3.5L (L52) - H3

Fig. 541: View Fixture Plate & Bolts - Crankshaft Main Bolt Hole Thread Repair
Courtesy of GENERAL MOTORS CORP.

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.

2006 Hummer H3

2006 ENGINE Engine Mechanical - 3.5L (L52) - H3