Hummer H3. Manual — part 431

Tap (2) J 42385-403

Installation driver (3) J 42385-404

Alignment pin (4) J 42385-303

Bushing (5) J 42385-302

Bolts (6) J 42385-421

Fixture plate (7) J 42385-401

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 .

IMPORTANT:

Remove the fixture plate prior to installing the insert with the
installer tool.

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.

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

Fig. 551: View Of Bushing, Fixture Plate, Bolts & Bolt Hole
Courtesy of GENERAL MOTORS CORP.

1. Position the fixture plate (3) with the bushing (1) installed over the cylinder head bolt hole

to be repaired (4).

2. Loosely install the fixture plate bolts (2) into the remaining cylinder head bolt holes.

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

Fig. 552: View Of Alignment Pin & Fixture Retaining Bolts
Courtesy of GENERAL MOTORS CORP.

3. Position the alignment pin (1) through the bushing and into the cylinder head bolt hole.

4. With the alignment pin in the desired cylinder head bolt hole, tighten the fixture retaining

bolts (2).

5. Remove the alignment pin (1) from the cylinder head bolt hole.

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

Fig. 553: Drilling Out Threads Of Damaged Hole
Courtesy of GENERAL MOTORS CORP.

6. Drill out the threads of the damaged hole.

IMPORTANT: During the drilling process, it is necessary to repeatedly

remove the drill and clean chips from the hole and the flutes
of the drill.

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3