Hummer H2. Manual - part 1687

Ground Harness Bolt

25 N.m 18 lb ft

Ignition Coil-to-Bracket Bolts

8 N.m 71 lb in

Ignition Coil Bracket-to-Valve Rocker Arm Cover Bolts

12 N.m

106 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 Wiring Harness Stud

10 N.m 89 lb in

Knock Sensors

20 N.m 15 lb ft

Oil Filter

30 N.m 22 lb ft

Oil Filter Fitting

55 N.m 40 lb ft

Oil Level Indicator Tube Bolt

25 N.m 18 lb ft

Oil Level Sensor

13 N.m

115 lb 

in

Oil Pan Baffle Bolts

12 N.m

106 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

12 N.m

106 lb 

in

Oil Pan Drain Plug

25 N.m 18 lb ft

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

25 N.m 18 lb ft

Oil Pan M6 Bolts - Oil Pan-to-Rear Cover

12 N.m

106 lb 

in

Oil Pressure Sensor

20 N.m 15 lb ft

Oil Pump-to-Engine Block Bolts

25 N.m 18 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 Bolt

12 N.m

106 lb 

in

Positive Battery Cable Clip Bolt

9 N.m 80 lb in

Power Steering Pump Rear Bolt

50 N.m 37 lb ft

Spark Plugs - New Cylinder Heads

20 N.m 15 lb ft

Spark Plugs - All Subsequent Installations

15 N.m 11 lb ft

Throttle Body Nuts

10 N.m 89 lb in

Throttle Body Studs

6 N.m 53 lb in

Torque Converter Bolts

63 N.m 47 lb ft

Transmission Cover Bolt

12 N.m

106 lb 

in

106 lb 

 

2004 Hummer H2 

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

  

ENGINE MECHANICAL SPECIFICATIONS 

Engine Mechanical Specifications 

Valve Lifter Guide Bolts

12 N.m

in

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

Water Pump Cover Bolts

15 N.m 11 lb ft

Application

Specification

Metric

English

General

z

Engine Type  

V8

z

Displacement  

6.0L

364 CID

z

RPO  

LQ4

z

VIN  

U

z

Bore  

101.618-101.636 

mm

4.0007-4.0014 in

z

Stroke  

92.0 mm

3.622 in

z

Compression Ratio  

9.41:1

z

Firing Order  

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

z

Spark Plug Gap  

1.524 mm

0.06 in

Block

z

Camshaft Bearing Bore 1 and 5 Diameter - First Design  

59.12-59.17 mm

2.327-2.329 in

z

Camshaft Bearing Bore 2 and 4 Diameter - First Design  

58.87-58.92 mm

2.317-2.319 in

z

Camshaft Bearing Bore 3 Diameter - First Design  

58.62-58.67 mm

2.307-2.309 in

z

Camshaft Bearing Bore 1 and 5 Diameter - Second Design   59.62-59.67 mm

2.347-2.349 in

z

Camshaft Bearing Bore 2 and 4 Diameter - Second Design   59.12-59.17 mm

2.327-2.329 in

z

Camshaft Bearing Bore 3 Diameter - Second Design  

58.62-58.67 mm

2.307-2.309 in

z

Crankshaft Main Bearing Bore Diameter  

69.871-69.889 

mm

2.75-2.751 in

z

Crankshaft Main Bearing Bore Out-of-Round  

0.006 mm

0.0002 in

z

Cylinder Bore Diameter  

101.618-101.636 

mm

4.0007-4.0017 in

z

Cylinder Bore Taper - Thrust Side  

0.018 mm

0.0007 in

 

2004 Hummer H2 

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

  

z

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

234.57-234.82 

mm

9.235-9.245 in

z

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

0.11 mm

0.004 in

z

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

0.22 mm

0.008 in

z

Valve Lifter Bore Diameter  

21.417-21.443 

mm

0.843-0.844 in

Camshaft

z

Camshaft End Play  

0.025-0.305 mm

0.001-0.012 in

z

Camshaft Journal Diameter  

54.99-55.04 mm

2.164-2.166 in

z

Camshaft Journal Out-of-Round  

0.025 mm

0.001 in

z

Camshaft Lobe Lift - Exhaust  

7.13 mm

0.281 in

z

Camshaft Lobe Lift - Intake  

6.96 mm

0.274 in

z

Camshaft Runout - Measured at the Intermediate Journals  

0.05 mm

0.002 in

Connecting Rod

z

Connecting Rod Bearing Clearance - Production  

0.023-0.065 mm

0.0009-0.0025 in

z

Connecting Rod Bearing Clearance - Service  

0.023-0.076 mm

0.0009-0.003 in

z

Connecting Rod Bore Diameter - Bearing End  

56.505-56.525 

mm

2.224-2.225 in

z

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

0.006 mm

0.0002 in

z

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

0.006 mm

0.0002 in

z

Connecting Rod Side Clearance  

0.11-0.51 mm

0.00433-0.02 in

Crankshaft

z

Connecting Rod Journal Diameter - Production  

53.318-53.338 

mm

2.0991-2.0999 in

z

Connecting Rod Journal Diameter - Service  

53.308 mm

2.0987 in

z

Connecting Rod Journal Out-of-Round - Production  

0.005 mm

0.0002 in

z

Connecting Rod Journal Out-of-Round - Service  

0.01 mm

0.0004 in

z

Connecting Rod Journal Taper - Maximum for 1/2 of 
Journal Length - Production  

0.005 mm

0.0002 in

z

Connecting Rod Journal Taper - Maximum for 1/2 of 
Journal Length - Service  

0.02 mm

0.00078 in

z

Crankshaft End Play  

0.04-0.2 mm

0.0015-0.0078 in

z

Crankshaft Main Bearing Clearance - Production  

0.02-0.052 mm

0.0008-0.0021 in

 

2004 Hummer H2 

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

  

z

Crankshaft Main Bearing Clearance - Service  

0.02-0.065 mm

0.0008-0.0025 in

z

Crankshaft Main Journal Diameter - Production  

64.992-65.008 

mm

2.558-2.559 in

z

Crankshaft Main Journal Diameter - Service  

64.992 mm

2.558 in

z

Crankshaft Main Journal Out-of-Round - Production  

0.003 mm

0.000118 in

z

Crankshaft Main Journal Out-of-Round - Service  

0.008 mm

0.0003 in

z

Crankshaft Main Journal Taper - Production  

0.01 mm

0.0004 in

z

Crankshaft Main Journal Taper - Service  

0.02 mm

0.00078 in

z

Crankshaft Rear Flange Runout  

0.05 mm

0.002 in

z

Crankshaft Reluctor Ring Runout - Measured 1.0 mm (0.04 
in) Below Tooth Diameter  

0.7 mm

0.028 in

z

Crankshaft Thrust Surface - Production  

26.14-26.22 mm

1.029-1.0315 in

z

Crankshaft Thrust Surface - Service  

26.22 mm

1.0315 in

z

Crankshaft Thrust Surface Runout  

0.025 mm

0.001 in

Cylinder Head

z

Cylinder Head Height/Thickness - Measured from the 
Cylinder Head Deck to the Valve Rocker Arm Cover Seal 
Surface  

120.2 mm

4.732 in

z

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

0.08 mm

0.003 in

z

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

0.1 mm

0.004 in

z

Surface Flatness - Exhaust Manifold Deck  

0.13 mm

0.005 in

z

Surface Flatness - Intake Manifold Deck  

0.08 mm

0.0031 in

z

Valve Guide Installed Height - Measured from the Spring 
Seat Surface to the Top of the Guide  

17.32 mm

0.682 in

Intake Manifold

z

Surface Flatness - Measured at Gasket Sealing Surfaces and 
Measured Within a 200 mm (7.87 in) Area that Includes 
Two Runner Port Openings  

0.3 mm

0.118 in

Lubrication System

z

Oil Capacity - with Filter  

5.68 Liters

6.0 Quarts

z

Oil Capacity - without Filter  

4.73 Liters

5.0 Quarts

z

Oil Pressure - Minimum - Hot  

41 kPa at 1,000 

engine RPM 

124 kPa at 2,000 

engine RPM 

165 kPa at 4,000 

6 psig at 1,000 

engine RPM 

18 psig at 2,000 

engine RPM 

24 psig at 4,000 

 

2004 Hummer H2 

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