Hummer H3. Manual — part 221

Fig. 505: View Of Installed Insert - Recessed Thread
Courtesy of GENERAL MOTORS CORP.

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

counterbored surface remove the insert immediately with a
screw extracting tool and inspect the tapped hole for any

2006 Hummer H3

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

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

Fig. 506: Installed Insert - Recessed Thread Repair
Courtesy of GENERAL MOTORS CORP.

remaining chips and/or improper tapping.

IMPORTANT: The driver installation tool will tighten up before screwing

completely through the insert. This is acceptable. The

2006 Hummer H3

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

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

Fig. 507: Inspecting Insert For Proper Installation - Recessed Thread
Courtesy of GENERAL MOTORS CORP.

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

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. 508: View Of Restricted Engine Coolant Passage - Recessed 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.

Tapered Pipe Thread Repair

The thread repair insert for tapered pipe threads is coated with a clear silver zinc coating.

2006 Hummer H3

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