GM Service Manual Online
For 1990-2009 cars only

Application

Specification

Metric

English

General

  • Engine Type

90 degree V-8

  • Displacement

6.6 Liter

402 cu in

  • RPO

LB7

  • Bore

103 mm

4.0551 in

  • Stroke

99 mm

3.8976 in

  • Compression Ratio

17.5:1

  • Engine Compression Test - Minimum

2069 KPa

300 psi

  • Idle Speed

680 RPM

  • Firing Order

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

Block

  • Cylinder Bore Diameter - Service Limits

103.11 mm

4.0594 in

  • Cylinder Bore Diameter - Production Value

103.0-103.014 mm

4.0551-4.0557 in

  • Cylinder Bore Out-of-Round - Production Value

0.015 mm

0.0006 in

  • Cylinder Bore Taper - Production Value

0.015 mm

0.0006 in

Camshaft

  • Camshaft Bearing Inside Diameter - Service Limit

61.07 mm

2.4043 in

  • Camshaft Bearing Inside Diameter - Production Value

61.00-61.03 mm

2.4016-2.4028 in

  • Camshaft End Play - Service Limit

0.2 mm

0.0079 in

  • Camshaft Journal Diameter - Service Limit

60.92 mm

2.3984 in

  • Camshaft Journal Diameter - Production Value

60.932-60.962 mm

2.3990-2.4001 in

  • Camshaft Lobe Lift - Exhuast - Production Value

5.907 mm

0.2326 in

  • Camshaft Lobe Lift - Intake - Production Value

7.273 mm

0.2863 in

  • Camshaft Runout - Service Limit

0.05 mm

0.0020 in

Cooling System

  • Capacity @ Engine RPM

270 L/min @ 3172 RPM

  • Thermostat Full Open Temperature

110 degrees C

230 degrees F

  • Turbocharger Coolant Bypass Valve

60 degrees C

140 degrees F

Connecting Rod

  • Connecting Rod Bearing Clearance - Service Limit

0.10 mm

0.0039 in

  • Connecting Rod Bearing Clearance - Production Value

0.036-0.077 mm

0.0014-0.0030 in

  • Connecting Rod Bore Diameter - Bearing End - Production Value

62.958-62.979 mm

2.4789-2.4795 in

  • Connecting Rod Bore Diameter - Pin End - Service Limit

34.53 mm

1.3594 in

  • Connecting Rod Bore Diameter - Pin End - Production Value

34.512-34.522 mm

1.3587-1.3591 in

  • Connecting Rod Length

163.0 mm

6.42 in

  • Connecting Rod Side Clearance - Service Limit

0.54 mm

0.0213 in

  • Connecting Rod Side Clearance - Production Value

0.31-0.49 mm

0.0122-0.0193 in

Crankshaft

  • Connecting Rod Journal Diameter - Service Limit

62.88 mm

2.4756 in

  • Connecting Rod Journal Diameter - Production Value

62.902-62.922 mm

2.4764-2.4772 in

  • Crankshaft End Play - Service Limit

0.54 mm

0.0213 in

  • Crankshaft End Play - Production Value

0.04-0.205 mm

0.0016-0.0081 in

  • Crankshaft Main Bearing Clearance - Service Limit

0.014 mm

0.0055 in

  • Crankshaft Main Bearing Clearance - Production Value

0.037-0.072 mm

0.0015-0.0028 in

  • Crankshaft Main Journal Diameter - Service Limit

79.89 mm

3.1453 in

  • Crankshaft Main Journal Diameter - Production Value

79.905-79.925 mm

3.1459-3.1466 in

  • Crankshaft Runout - Service Limit

0.44 mm

0.0173 in

  • Crankshaft Runout - Production Value

0.05 mm

0.0020 in

Cylinder Head

  • Surface Flatness - Block Deck - Service Limit

0.2 mm

0.0079 in

  • Surface Flatness - Block Deck - Production Value

0.075 mm

0.0030 in

  • Surface Flatness - Exhaust Manifold Deck - Production Value

0.1 mm

0.0039 in

  • Surface Flatness - Intake Manifold Deck - Production Value

0.1 mm

0.0039 in

Exhaust Manifold

  • Surface Flatness- Production Value

0.3 mm

0.0118 in

Intake Manifold

  • Surface Flatness - Production Value

0.3 mm

0.0118 in

Lubrication System

  • Oil Capacity - with Filter

10 qt

9.5 L

  • Oil Capacity - without Filter

9.2 qt

8.7 L

  • Oil Pressure - Minimum- Hot - at idle

98 KPa

14 psi

  • Oil Pressure - Minimum - 1800 RPM

294 KPa

42 psi

  • Oil Relief Valve Opening Pressure

441 KPa

64 psi

  • Piston Cooling Jet Valve Opening Pressure

196 KPa

29 psi

Oil Pump

  • Gear Shaft Outside Diameter - Drive - Service Limit

19.86 mm

0.7819 in

  • Gear Shaft Outside Diameter - Drive - Production Value

19.947-19.960 mm

0.7853-0.7858 in

  • Gear Shaft Outside Diameter - Driven - Service Limit

19.86 mm

0.7819 in

  • Gear Shaft Outside Diameter - Driven - Production Value

19.947-19.960 mm

0.7853-0.7858 in

  • Gear Shaft-to-Bushing - Service Limit Clearance

0.14 mm

0.0055 in

  • Gear-to-Cover Clearance - Drive/Driven - Service Limit

0.109 mm

0.0043 in

  • Gear-to-Cover Clearance - Drive/Driven - Production Value

0.064-0.109 mm

0.0025-0.0043 in

  • Gear-to-Housing Clearance - Drive/Driven - Service Limit

0.22 mm

0.0087 in

  • Gear-to-Housing Clearance - Drive/Driven - Production Value

0.125-0.221 mm

0.0049-0.0087 in

Piston Rings

  • Piston Ring End Gap-First Compression Ring - Service Limit

1.37 mm

0.0539 in

  • Piston Ring End Gap-First Compression Ring - Production Value

0.3-0.45 mm

0.0118-0.0177 in

  • Piston Ring End Gap-Second Compression Ring - Service Limit

1.35 mm

0.0531 in

  • Piston Ring End Gap-Second Compression Ring - Production Value

0.50-0.65 mm

0.0197-0.0256 in

  • Piston Ring End Gap-Oil Control Ring - Service Limit

1.20 mm

0.0472 in

  • Piston Ring End Gap-Oil Control Ring - Production Value

0.15-0.35 mm

0.0059-0.0138 in

  • Piston Ring to Groove Clearance-First Compression Ring - Service Limit

0.26 mm

0.0102 in

  • Piston Ring to Groove Clearance-First Compression Ring - Production Value

0.08-0.17 mm

0.0030-0.0067 in

  • Piston Ring to Groove Clearance-Second Compression Ring - Service Limit

0.10 mm

0.0039 in

  • Piston Ring to Groove Clearance-Second Compression Ring - Production Value

0.01-0.03 mm

0.0004-0.0012 in

  • Piston Ring to Groove Clearance-Oil Control Ring - Service Limit

0.12 mm

0.0047 in

  • Piston Ring to Groove Clearance-Oil Control Ring - Production Value

0.01-0.03 mm

0.0004-0.0012 in

Pistons and Pins

  • Piston-Piston Diameter

102.948-102.960 mm

4.0531-4.0535 in

  • Piston-Piston Pin Bore Diameter

34.504-34.512 mm

1.3584-1.3587 in

  • Pin-Piston Pin Clearance to Piston Pin Bore - Service Limit

0.017 mm

0.0007 in

  • Pin-Piston Pin Clearance to Piston Pin Bore - Production Value

0.004-0.017 mm

0.0002-0.0007 in

  • Pin-Piston Pin Diameter - Service Limit

34.45 mm

1.3563 in

  • Pin-Piston Pin Diameter - Production Value

34.495-34.5 mm

1.3581-1.3583 in

Starter

  • Rated Output

3.5 KW

Turbocharger

  • Axial Play

0.11 mm

0.0043 in

  • Radial Play

0.20 mm

0.0079 in

Valve System

  • Valves-Valve Face Angle - Production Value

45 degrees

  • Valves-Valve Face Runout

--

--

  • Valves-Valve Face Width - Service Limit

2.5 mm

0.0984 in

  • Valves-Valve Face Width - Production Value

2.1 mm

0.0827 in

  • Valves-Valve Head Diameter - Exhaust

31.0 mm

1.22 in

  • Valves-Valve Head Diameter - Intake

33.0 mm

1.30 in

  • Valves-Valve Seat Angle

45 degrees

  • Valves-Valve Stem Diameter

7.0 mm

0.28 in

  • Valves-Valve Stem Oil Seal Installed Height

6.05 mm

0.2382 in

  • Valves-Valve Stem-to-Guide Clearance - Service Limit

0.20 mm

0.0079 in

  • Valves-Valve Stem-to-Guide Clearance - Exhaust - Production Value

0.038-0.071 mm

0.0015-0.0028 in

  • Valves-Valve Stem-to-Guide Clearance - Intake - Production Value

0.030-0.063 mm

0.0012-0.0025 in

  • Valves-Valve Stem-to-Guide Clearance

0.20 mm

0.0079 in

  • Valve Lifters/Push Rods-Push Rod Straightness

0.8 mm

0.0315 in

  • Rocker Arms-Valve Rocker Arm Bore Diameter

22.010-22.035 mm

0.8665-0.8675 in

  • Rocker Arms-Valve Rocker Arm Bore-to-Shaft Clearance - Service Limit

0.20 mm

0.0079 in

  • Rocker Arms-Valve Rocker Arm Bore-to-Shaft Clearance - Production Value

0.010-0.056 mm

0.0004-0.0022 in

  • Rocker Arms-Valve Rocker Arm Ratio - Exhaust

1.69:1

  • Rocker Arms-Valve Rocker Arm Ratio - Intake

1.36:1

  • Rocker Arms-Valve Rocker Arm Shaft Diameter - Service Limit

21.85 mm

0.8602 in

  • Rocker Arms-Valve Rocker Arm Shaft Diameter - Production Value

21.979-22.000 mm

0.8653-0.8661 in

  • Valve Springs-Valve Spring Free Length - Production Value

56.6 mm

2.2283 in

  • Valve Springs-Valve Spring Installed Height - Production Value

41 mm

1.6142 in

  • Valve Springs-Valve Spring Load - Exhaust - Service Limit

275 N at 41 mm

61.8 lb at 1.61 in

  • Valve Springs-Valve Spring load - Exhaust - Production Value

315-363 N at 41 mm

71-81.6 lb at 1.61 in

  • Valve Springs-Valve Spring Load - Intake - Service Limit

306 N at 41 mm

68.8 lb at 1.61 in

  • Valve Springs-Valve Spring Load - Intake - Production Value

315-363 N at 41 mm

71-81.6 lb at 1.61 in