Hummer H3. Manual — part 418

Fig. 499: Identifying Proper Drilling Angle
Courtesy of GENERAL MOTORS CORP.

During the drilling and tapping of the hole being repaired ensure the tooling is consistently
machining perpendicular to the surface of the base material.

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

Fig. 500: View Of Tapping Guide
Courtesy of GENERAL MOTORS CORP.

If the threaded hole being repaired has a base surface perpendicular to the hole centerline,
tapping guides are available to aid in tapping the hole.

Thread Repair

Tap Size

Tap Guide

Tape Size

Tape Guide

Tap Size

Tape Guide

-

J 42385-

-

J 42385-

-

J 42385-

6 x 1.0

729

10 x 1.5

731

14 x 1.5

736

8 x 1.25

730

12 x 1.5

732

20 x 1.5

737

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

Standard Thread Repair - Flush Hole

Fig. 501: View Of Bushing Type Insert & Base Material
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.

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

When installed to the proper depth, the flange (1) of the insert will be seated against the
counterbore of the drilled/tapped hole and just below the surface (2) of the base material.

Fig. 502: Drilling Out Threads Of Damaged Hole
Courtesy of GENERAL MOTORS CORP.

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3