Chevrolet Silverado / GMC Sierra. Service manual — part 380

Fig. 513: Drilling & Tapping Threads
Courtesy of GENERAL MOTORS CORP.

CAUTION: Refer to Safety Glasses Caution .

IMPORTANT:

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.

2008 Hummer H2

2008 ENGINE Engine Mechanical - 6.2L - H2

1. Drill out the threads of the damaged hole (1).

M6 inserts require a minimum drill depth of 15 mm (0.59 in).

M8 inserts require a minimum drill depth of 20 mm (0.79 in).

M10 inserts require a minimum drill depth of 23.5 mm (0.93 in).

2. Using compressed air, clean out any chips.

Driver oil MUST be used on the installer driver tool.

The tool kits are designed for use with either a suitable
tap wrench or drill motor.

2008 Hummer H2

2008 ENGINE Engine Mechanical - 6.2L - H2

Fig. 514: View Of Counterbore Drill
Courtesy of GENERAL MOTORS CORP.

3. Counterbore the hole to the full depth permitted by the tool (1).

4. Using compressed air, clean out any chips.

2008 Hummer H2

2008 ENGINE Engine Mechanical - 6.2L - H2

Fig. 515: Drilling & Tapping Threads
Courtesy of GENERAL MOTORS CORP.

5. Using a tap wrench (2), tap the threads of the drilled hole.

M6 inserts require a minimum tap depth of 15 mm (0.59 in).

M8 inserts require a minimum tap depth of 20 mm (0.79 in).

M10 inserts require a minimum tap depth of 23.5 mm (0.93 in).

6. Using compressed air, clean out any chips.

7. Spray cleaner GM P/N 12346139, GM P/N 12377981 (Canadian P/N 10953463), or

2008 Hummer H2

2008 ENGINE Engine Mechanical - 6.2L - H2