Hummer H3. Manual — part 225

Fig. 521: Installing Insert - Tapered Pipe Thread Repair
Courtesy of GENERAL MOTORS CORP.

IMPORTANT: If the insert will not thread down until the flange contacts the

surface of the base material remove the insert immediately

2006 Hummer H3

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

12. Install the insert until the flange (2) of the insert contacts the surface of the base material.

Fig. 522: Installed Insert - Tapered Pipe Thread Repair

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

2006 Hummer H3

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

Courtesy of GENERAL MOTORS CORP.

13. Continue to rotate the driver installation tool (1) until the top of the threaded section (2) is

level with the top of the insert (3).

Fig. 523: Inspecting Insert For Proper Installation - Tapered Thread
Courtesy of GENERAL MOTORS CORP.

14. Inspect the insert (1) for proper installation (2) into the tapped hole.

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.

2006 Hummer H3

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

Fig. 524: View Of Restricted Engine Coolant Passages - Tapered Pipe Thread Repair
Courtesy of GENERAL MOTORS CORP.

15. 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.

Cylinder Head Bolt Hole Thread Repair

2006 Hummer H3

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