Chevrolet Silverado / GMC Sierra. Manual — part 382

The installer tool will tighten up before screwing completely through the insert. This is
acceptable. You are forming the bottom threads of the insert and mechanically locking the
insert to the base material threads.

Fig. 520: View Of Bushing Type Insert & Base Material
Courtesy of GENERAL MOTORS CORP.

13. Inspect the insert for proper installation into the hole.

A properly installed insert (1) will be either flush or slightly below flush with the surface of
the base material (2).

Cylinder Head Bolt Hole Thread Repair

2008 Hummer H2

2008 ENGINE Engine Mechanical - 6.2L - H2

2008 Hummer H2

2008 ENGINE Engine Mechanical - 6.2L - H2

Fig. 521: Identifying Thread Repair Kit Components
Courtesy of GENERAL MOTORS CORP.

1. The cylinder head bolt hole thread repair kit consists of the following items:

The drill (1)

The tap (2)

The installer (3)

The sleeve (4)

The alignment pin (5)

The bushing (6)

The bolts (7)

The fixture plate (8)

2008 Hummer H2

2008 ENGINE Engine Mechanical - 6.2L - H2

Fig. 522: View Of Fixture Plate, Bolts, Bushing & Cylinder Hole
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 and tapping
procedures.

Driver oil MUST be used on the installer driver tool.

2008 Hummer H2

2008 ENGINE Engine Mechanical - 6.2L - H2