Hummer H3. Manual — part 422

13. Install the insert until the flange (2) of the insert contacts the counterbored surface.

Fig. 515: View Insert And Tool - Standard Thread
Courtesy of GENERAL MOTORS CORP.

screw extracting tool and inspect the tapped hole for any
remaining chips and/or improper tapping.

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

14. Continue to rotate the driver installation tool (1) through the insert (2).

Fig. 516: View Of Bushing Type Insert & Base Material
Courtesy of GENERAL MOTORS CORP.

15. Inspect the insert for proper installation into the tapped hole. A properly installed insert (1)

IMPORTANT: The driver installation tool will tighten up before screwing

completely through the insert. This is acceptable. The
threads at the bottom of the insert are being formed and the
insert is mechanically locking the insert into the base
material threads.

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

will be either flush or slightly below flush with the surface of the base material (2).

Fig. 517: View Of Restricted Engine Coolant Passages - Standard Thread Repair
Courtesy of GENERAL MOTORS CORP.

16. Any installed insert that restricts or blocks an oil or engine coolant passage (3) will need to

have the oil or engine coolant passage drilled out (4) to the original size of the oil or engine
coolant passage. After drilling the restriction or blockage, clean out any chips and thread the
installation driver tool through the insert again to remove any burrs caused by the drilling of
the oil or engine coolant passage.

Recessed Thread Repair

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

Fig. 518: Inspecting Insert For Proper Installation - Recessed Thread
Courtesy of GENERAL MOTORS CORP.

When installed to the proper depth, the flange of the insert (1) will be seated against the

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.

Do NOT remove the original stop collar from a counterbore
drill.

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3