Hummer H3. Manual — part 432

Fig. 554: Cleaning Out Metal Chips
Courtesy of GENERAL MOTORS CORP.

7. Using compressed air, clean out any chips.

IMPORTANT: All chips must be removed from the drilled hole prior to

tapping.

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

Fig. 555: Tapping Out Threads Of Drilled Hole
Courtesy of GENERAL MOTORS CORP.

8. Using a suitable tapping wrench, tap the threads of the drilled hole.

IMPORTANT:

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.

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

Fig. 556: View Of Tap Upper & Lower Marks, Fixture Plate & Bushing
Courtesy of GENERAL MOTORS CORP.

9. In order to tap the new threads for the insert to the proper depth, rotate the tap into the

cylinder head bolt hole until the first mark (1) on the tap aligns with the top of the drill
bushing (3).

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

Fig. 557: View Of Bushing, Fixture Plate, Bolts & Bolt Hole
Courtesy of GENERAL MOTORS CORP.

10. Remove the fixture plate bolts (2).

11. Remove the fixture plate (3) and bushing (1).

IMPORTANT: Remove the fixture plate prior to installing the insert with the

installer tool.

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3