Hummer H2. Manual — part 1847

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. 555: 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

2004 Hummer H2

2004 ENGINE Engine Mechanical - 4.8L, 5.3L, and 6.0L - Hummer H2

2004 Hummer H2

2004 ENGINE Engine Mechanical - 4.8L, 5.3L, and 6.0L - Hummer H2

Fig. 556: Cylinder Head Bolt Hole Thread Repair Kit
Courtesy of GENERAL MOTORS CORP.

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

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The drill (1)

z

The tap (2)

z

The installer (3)

z

The sleeve (4)

z

The alignment pin (5)

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The bushing (6)

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The bolts (7)

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The fixture plate (8)

Fig. 557: Cylinder Head Bolt Tightening Sequence (Right)
Courtesy of GENERAL MOTORS CORP.

2. Measure the depth of the cylinder head bolt holes (1-10) to determine the proper drill and tap depths.

Refer to Thread Repair Specifications .

IMPORTANT: First design engine blocks have different drill and tap depths using both

medium length 100 mm (3.94 in) and long 155 mm (6.1 in) M11 cylinder
head bolts. Second design engine blocks use only the medium length 100
mm (3.94 in) bolt with a common drill and tap depth.

2004 Hummer H2

2004 ENGINE Engine Mechanical - 4.8L, 5.3L, and 6.0L - Hummer H2

Fig. 558: Fixture Plate, Bolts, Bushing & Cylinder Hole
Courtesy of GENERAL MOTORS CORP.

CAUTION: Refer to Safety Glasses Caution in Cautions and Notices.

IMPORTANT:

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The use of a cutting type fluid GM P/N 1052864 (Canadian P/N
992881), WD 40(R), or equivalent is recommended when performing
the drilling and tapping procedures.

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Driver oil MUST be used on the installer driver tool.

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The tool kits are designed for use with either a suitable tap wrench
or drill motor.

2004 Hummer H2

2004 ENGINE Engine Mechanical - 4.8L, 5.3L, and 6.0L - Hummer H2