Hummer H3. Manual — part 223

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

Fig. 513: View Of Proper Tapping Distance - Tapered Thread
Courtesy of GENERAL MOTORS CORP.

4. Tap the drilled hole until the threads at the top of the tap (2) are down to the surface of the

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

base material.

Fig. 514: Cleaning Out Metal Chips
Courtesy of GENERAL MOTORS CORP.

5. Using compressed air, clean out any chips.

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

insert installation.

2006 Hummer H3

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

Fig. 515: Spraying Cleaner Into Tapped Hole
Courtesy of GENERAL MOTORS CORP.

6. Spray cleaner GM P/N 12377981 (Canadian P/N 10953463) or equivalent into the tapped

hole.

2006 Hummer H3

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

Fig. 516: 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 tapped hole prior to

insert installation.

2006 Hummer H3

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