Hummer H3. Manual — part 231

Fig. 542: View Of Alignment Pin & Fixture Retaining Bolts - Crankshaft Main Bolt
Hole Thread Repair
Courtesy of GENERAL MOTORS CORP.

3. Position the alignment pin (1) through the bushing and into the crankshaft main cap bolt

hole.

4. With the alignment pin in the desired crankshaft main cap bolt hole, tighten the fixture

retaining bolts (2).

5. Remove the alignment pin (1) from the crankshaft main cap bolt hole.

2006 Hummer H3

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

Fig. 543: Drilling Out Threads Of Damaged Hole - Crankshaft Main Bolt Hole
Thread Repair
Courtesy of GENERAL MOTORS CORP.

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.

Drill the crankshaft main bolt hole until the mark (1) on
the drill aligns with the top of the drill bushing (2).

2006 Hummer H3

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

6. Drill out the threads of the damaged hole.

Fig. 544: 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.

2006 Hummer H3

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

Fig. 545: Tapping Threads Using Tapping Wrench - Crankshaft Main Bolt Hole
Thread Repair
Courtesy of GENERAL MOTORS CORP.

IMPORTANT:

Do not remove the fixture plate, ensure the fixture plate
is installed during the machining and installation
processes of the insert.

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.

2006 Hummer H3

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