Hummer H3. Manual — part 478

Crankshaft Bearing Cap M10 Bolts - Final Pass in
Sequence

80 degrees

Crankshaft Bearing Cap M10 Studs - First Pass in
Sequence

20 N.m

15 lb ft

Crankshaft Bearing Cap M10 Studs - Final Pass in
Sequence

51 degrees

Crankshaft Oil Deflector Nuts

25 N.m

18 lb ft

Crankshaft Position (CKP) Sensor Bolt

25 N.m

18 lb ft

Crankshaft Rear Oil Seal Housing Bolts

30 N.m

22 lb ft

Cylinder Head M8 Bolts - in Sequence

30 N.m

22 lb ft

Cylinder Head M11 Bolts - First Pass in Sequence

30 N.m

22 lb ft

Cylinder Head M11 Bolts - Second Pass in
Sequence

90 degrees

Cylinder Head M11 Bolts - Final Pass in Sequence

70 degrees

Cylinder Head Plug

20 N.m

15 lb ft

Engine Block Coolant Drain Hole Plug

60 N.m

44 lb ft

Engine Block Coolant Heater

50 N.m

37 lb ft

Engine Block Oil Gallery Plugs

60 N.m

44 lb ft

Engine Harness Ground Strap Bolt/Stud

16 N.m

12 lb ft

Engine Harness-to-Generator Bracket Bolt

9 N.m

80 lb in

Engine Harness Retainer-to-Intake Manifold Nut

5 N.m

44 lb in

Engine Mount Bracket Through Bolt

100 N.m

74 lb ft

Engine Mount-to-Engine Block Bolts

55 N.m

41 lb ft

Evaporative (EVAP) Emission Pipe Bracket Nut

20 N.m

15 lb ft

Exhaust Manifold Bolts - First Pass

15 N.m

11 lb ft

Exhaust Manifold Bolts - Final Pass

20 N.m

15 lb ft

Exhaust Manifold Heat Shield Bolts

9 N.m

80 lb in

Exhaust Manifold Studs

20 N.m

15 lb ft

Front Cover Bolts

25 N.m

18 lb ft

Fuel Injection Fuel Rail Bolts

10 N.m

89 lb in

Fuel Injection Fuel Rail Crossover Tube Bolts

3.8 N.m

34 lb in

Fuel Rail Stop Bracket Bolt

50 N.m

37 lb ft

Generator Bracket Bolts

50 N.m

37 lb ft

Ignition Coil Bracket-to-Valve Rocker Arm Cover
Studs

12 N.m

106 lb in

2008 Hummer H3

2008 ENGINE Engine Mechanical - 5.3L - H3

Ignition Coil-to-Bracket Bolts

10 N.m

89 lb in

Intake Manifold Bolts - First Pass in Sequence

5 N.m

44 lb in

Intake Manifold Bolts - Final Pass in Sequence

10 N.m

89 lb in

Intake Manifold Sight Shield Retainer Bolts

5 N.m

44 lb in

J 41798 M8 Bolt

25 N.m

18 lb ft

J 41798 M10 Bolts

50 N.m

37 lb ft

Knock Sensor Bolts

25 N.m

18 lb ft

Negative Battery Cable Stud

25 N.m

18 lb ft

Oil Filter

30 N.m

22 lb ft

Oil Filter Fitting

55 N.m

40 lb ft

Oil Level Indicator Switch

20 N.m

15 lb ft

Oil Level Indicator Tube Bolt

25 N.m

18 lb ft

Oil Pan Baffle Bolts

9 N.m

80 lb in

Oil Pan Closeout Cover Bolt - Left Side

9 N.m

80 lb in

Oil Pan Closeout Cover Bolt - Right Side

9 N.m

80 lb in

Oil Pan Cover Bolts

9 N.m

80 lb in

Oil Pan Drain Plug

25 N.m

18 lb ft

Oil Pan M6 Bolts - Oil Pan-to-Rear Housing

12 N.m

106 lb in

Oil Pan M8 Bolts - Oil Pan-to-Engine Block and Oil
Pan-to-Front Cover

25 N.m

18 lb ft

Oil Pressure Relief Valve

27 N.m

20 lb ft

Oil Pressure Sensor

35 N.m

26 lb ft

Oil Pump Cover Bolts

12 N.m

106 lb in

Oil Pump Relief Valve Plug

12 N.m

106 lb in

Oil Pump Screen Nuts

25 N.m

18 lb ft

Oil Pump Screen-to-Oil Pump Bolts

12 N.m

106 lb in

Oil Pump-to-Engine Block Bolts

25 N.m

18 lb ft

Power Steering Pump-to-Engine Block Bolts

50 N.m

37 lb ft

Spark Plugs

15 N.m

11 lb ft

Throttle Body Bolts

10 N.m

89 lb in

Throttle Body Nuts

10 N.m

89 lb in

Throttle Body Studs

6 N.m

53 lb in

Timing Chain Tensioner Bolts

25 N.m

18 lb ft

Valley Cover Bolts

25 N.m

18 lb ft

Valve Lifter Guide Bolts

12 N.m

106 lb in

2008 Hummer H3

2008 ENGINE Engine Mechanical - 5.3L - H3

ENGINE MECHANICAL SPECIFICATIONS

Valve Rocker Arm Bolts

30 N.m

22 lb ft

Valve Rocker Arm Cover Bolts

12 N.m

106 lb in

Water Inlet Housing Bolts

15 N.m

11 lb ft

Water Pump Bolts - First Pass

15 N.m

11 lb ft

Water Pump Bolts - Final Pass

30 N.m

22 lb ft

Application

Specification

Metric

English

General

Engine Type

V8

Displacement

5.3L

325 CID

RPO

LH8

VIN

L

Bore

96.0-96.018 mm

3.779-3.78 in

Stroke

92.0 mm

3.622 in

Compression Ratio

9.95:1

Firing Order

1-8-7-2-6-5-4-3

Spark Plug Gap

1.02 mm

0.04 in

Block

Camshaft Bearing Bore 1 and 5 Diameter

59.58-59.63 mm

2.345-2.347 in

Camshaft Bearing Bore 2 and 4 Diameter

59.08-59.13 mm

2.325-2.327 in

Camshaft Bearing Bore 3 Diameter

58.58-58.63 mm

2.306-2.308 in

Crankshaft Main Bearing Bore Diameter

69.871-69.889

mm

2.75-2.751 in

Crankshaft Main Bearing Bore Out-of-Round

0.006 mm

0.0002 in

Cylinder Bore Diameter

96.0-96.018 mm

3.779-3.78 in

Cylinder Head Deck Height - Measuring from
the Centerline of Crankshaft to the Deck Face

234.57-234.82

mm

9.235-9.245 in

Cylinder Head Deck Surface Flatness -
Measured Within a 152.4 mm (6.0 in) Area

0.11 mm

0.004 in

2008 Hummer H3

2008 ENGINE Engine Mechanical - 5.3L - H3

Cylinder Head Deck Surface Flatness -
Measuring the Overall Length of the Block
Deck

0.22 mm

0.008 in

Valve Lifter Bore Diameter

21.417-21.443

mm

0.843-0.844 in

Camshaft

Camshaft End Play

0.025-0.305 mm

0.001-0.012 in

Camshaft Journal Diameter

54.99-55.04 mm

2.164-2.166 in

Camshaft Journal Out-of-Round

0.025 mm

0.001 in

Camshaft Lobe Lift - Intake

7.20 mm

0.283 in

Camshaft Lobe Lift - Exhaust

7.20 mm

0.283 in

Camshaft Runout - Measured at the
Intermediate Journals

0.05 mm

0.002 in

Connecting Rod

Connecting Rod Bearing Clearance -
Production

0.023-0.065 mm

0.0009-0.0025 in

Connecting Rod Bearing Clearance - Service

0.023-0.076 mm

0.0009-0.003 in

Connecting Rod Bore Diameter - Bearing End

56.505-56.525

mm

2.224-2.225 in

Connecting Rod Bore Out-of-Round - Bearing
End - Production

0.004-0.008 mm 0.00015-0.0003 in

Connecting Rod Bore Out-of-Round - Bearing
End - Service

0.004-0.008 mm 0.00015-0.0003 in

Connecting Rod Side Clearance

0.11-0.51 mm

0.00433-0.02 in

Crankshaft

Connecting Rod Journal Diameter - Production

53.318-53.338

mm

2.0991-2.0999 in

Connecting Rod Journal Diameter - Service

53.308 mm

2.0987 in

Connecting Rod Journal Out-of-Round -
Production

0.005 mm

0.0002 in

Connecting Rod Journal Out-of-Round -
Service

0.01 mm

0.0004 in

Connecting Rod Journal Taper - Maximum for

0.005 mm

0.0002 in

2008 Hummer H3

2008 ENGINE Engine Mechanical - 5.3L - H3