Chevrolet Silverado / GMC Sierra. Manual - part 387
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
0.14 mm
0.0055 in
Crankshaft Main Bearing Clearance -
Production Value
0.039-0.070 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
0.3 mm
0.0118 in
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Mechanical - 6.6L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Surface Flatness- Production Value
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
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Mechanical - 6.6L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
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
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Mechanical - 6.6L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Rated Output
3.5 KW
Valve System
Valves-Valve Face Angle - Production Value
45 degrees
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
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Mechanical - 6.6L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado