Hummer H3. Manual — part 480

THREAD REPAIR SPECIFICATIONS

Engine Block - Front/Rear Views

Engine Block Coolant Drain Hole Plug
Sealing Washer

Sealant

12346004

10953480

Engine Block Front Oil Gallery Plug

Threadlock

12345382

10953489

Engine Block Oil Gallery Plug Sealing
Washers

Sealant

12346004

10953480

Engine Oil Pressure Sensor Threads

Sealant

12346004

10953480

Engine Oil Supplement

Fluorescent Dye

12345795

10953470

Exhaust Manifold Bolts

Threadlock

12345493

10953488

Flywheel/Flex Plate Bolts

Threadlock

12345382

10953489

Fuel Injection Fuel Rail Bolts

Threadlock

12345382

10953489

Ignition Coil Bracket-to-Valve Cover
Studs

Threadlock

12345382

10953489

Ignition Coil-to-Bracket Bolts

Threadlock

12345382

10953489

Intake Manifold Bolts

Threadlock

12345382

10953489

Oil Pan Oil Gallery Plug Threads

Sealant

12346004

10953480

Oil Pan Surface at Front Cover and Rear
Housing

Sealant

12378521

88901148

Thread Repair Component Cleaner

Cleaner

12346139

10953463

Thread Repair Component Cleaner

Cleaner

12377981

10953463

Thread Repair Cutting Oil

Lubricant

1052864

992881

2008 Hummer H3

2008 ENGINE Engine Mechanical - 5.3L - H3

Fig. 1: Engine Block - Front/Rear Views
Courtesy of GENERAL MOTORS CORP.

Engine Block - Front/Rear Views

Hole

Thread

Size

Insert

Drill

Counterbore

Tool

Tap

Driver

Drill

Depth -

Maximum

mm (in)

Tap Depth

-

Maximum

mm (in)

J 42385-

1

M8 x

1.25

210

206

207

208

209

22.5

(0.885)

17.5

(0.688)

2

M10 x

1.5

215

211

212

213

214

27.5 (1.08)

22.0

(0.866)

3

M10 x

1.5

215

211

212

213

214

Thru

Thru

4

M8 x

1.25

210

206

207

208

209

Thru

Thru

5

M10 x

1.5

215

211

212

213

214

25.0

(0.984)

19.5

(0.767)

6

M10 x

1.5

215

211

212

213

214

32.5

(1.279)

25.0

(0.984)

7

M10 x

1.5

215

211

212

213

214

Thru

Thru

Bolt hole 6 is drilled and tapped for aluminum block applications only.

2008 Hummer H3

2008 ENGINE Engine Mechanical - 5.3L - H3

Engine Block - Left/Right Side Views

Fig. 2: Engine Block - Left/Right Side Views
Courtesy of GENERAL MOTORS CORP.

Engine Block - Left/Right Side Views

Hole

Thread

Size

Insert

Drill

Counterbore

Tool

Tap

Driver

Drill

Depth -

Maximum

mm (in)

Tap Depth

-

Maximum

mm (in)

J 42385-

1

M8 x

1.25

210

206

207

208

209

22.5

(0.885)

17.5

(0.688)

2

M8 x

1.25

210

206

207

208

209

28.5

(1.122)

23.0

(0.905)

3

M8 x

1.25

210

206

207

208

209

21.5

(0.846)

16.0

(0.629)

4

M10 x

1.25

215

211

212

213

214

29.0

(1.141)

23.0

(0.905)

5

M10 x

1.5

215

211

212

213

214

27.0

(1.062)

21.5

(0.846)

6

M16 x

1.5

N/A

N/A

N/A

N/A

N/A

N/A

N/A

7

M11 x

2.0

108

105

N/A

106

107

69.0 (2.72) 60.0 (2.36)

2008 Hummer H3

2008 ENGINE Engine Mechanical - 5.3L - H3

Engine Block - Top/Bottom Views

Fig. 3: Engine Block - Top/Bottom Views
Courtesy of GENERAL MOTORS CORP.

Engine Block - Top/Bottom Views

8

M28 x

1.25

N/A

N/A

N/A

N/A

N/A

N/A

N/A

Bolt hole 7 has a 30 mm (1.18 in) counterbore included in the 69.0 mm (2.72 in) drill
depth. Use sleeve J 42385-315 with the drill and tap.

Hole

Thread

Size

Insert

Drill

Counterbore

Tool

Tap

Driver

Drill

Depth -

Maximum

mm (in)

Tap Depth

-

Maximum

mm (in)

J 42385-

1

M8 x

1.25

210

206

207

208

209

22.5

(0.885)

17.5

(0.688)

2

M10 x

1.5

215

211

212

213

214

42.5 (1.67) 37.0 (1.45)

3

M10 x

2.0

104

101

N/A

102

103

31.0 (1.22) 25.5 (1.0)

4

M10 x

104

101

N/A

102

103

53.5 (2.10) 44.0 (1.73)

2008 Hummer H3

2008 ENGINE Engine Mechanical - 5.3L - H3