Chevrolet Silverado / GMC Sierra. Service manual — part 1863
End - Production
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
1/2 of Journal Length - Production
0.005 mm
0.0002 in
Connecting Rod Journal Taper - Maximum for
1/2 of Journal Length - Service
0.02 mm
0.00078 in
Crankshaft End Play
0.04-0.2 mm
0.0015-0.0078 in
Crankshaft Main Bearing Clearance -
Production
0.02-0.052 mm
0.0008-0.0021 in
Crankshaft Main Bearing Clearance - Service
0.02-0.065 mm
0.0008-0.0025 in
Crankshaft Main Journal Diameter -
Production
64.992-65.008 mm
2.558-2.559 in
Crankshaft Main Journal Diameter - Service
64.992 mm
2.558 in
Crankshaft Main Journal Out-of-Round -
Production
0.003 mm
0.000118 in
Crankshaft Main Journal Out-of-Round -
Service
0.008 mm
0.0003 in
Crankshaft Main Journal Taper - Production
0.01 mm
0.0004 in
Crankshaft Main Journal Taper - Service
0.02 mm
0.00078 in
Crankshaft Rear Flange Runout
0.05 mm
0.002 in
Crankshaft Reluctor Ring Runout - Measured
1.0 mm (0.04 in) Below Tooth Diameter
0.7 mm
0.028 in
Crankshaft Thrust Surface - Production
26.14-26.22 mm
1.029-1.0315 in
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L - Cab & Chassis Sierra, Cab & Chassis Silverado,
Sierra & Silverado
Crankshaft Thrust Surface - Service
26.22 mm
1.0315 in
Crankshaft Thrust Surface Runout
0.025 mm
0.001 in
Cylinder Head
Cylinder Head Height/Thickness - Measured
from the Cylinder Head Deck to the Valve
Rocker Arm Cover Seal Surface
120.2 mm
4.732 in
Surface Flatness - Block Deck - Measured
Within a 152.4 mm (6.0 in) Area
0.08 mm
0.003 in
Surface Flatness - Block Deck - Measuring the
Overall Length of the Cylinder Head
0.1 mm
0.004 in
Surface Flatness - Exhaust Manifold Deck
0.13 mm
0.005 in
Surface Flatness - Intake Manifold Deck
0.08 mm
0.0031 in
Valve Guide Installed Height - Measured from
the Spring Seat Surface to the Top of the
Guide
17.32 mm
0.682 in
Intake Manifold
Surface Flatness - Measured at Gasket Sealing
Surfaces and Measured Within a 200 mm (7.87
in) Area that Includes 2 Runner Port Openings
0.3 mm
0.118 in
Lubrication System
Oil Capacity - with Filter
5.68 liters
6.0 quarts
Oil Capacity - without Filter
5.2 liters
5.5 quarts
Oil Pressure - Minimum - Hot
41 kPa at 1,000
engine RPM
124 kPa at 2,000
engine RPM
165 kPa at 4,000
engine RPM
6 psig at 1,000
engine RPM
18 psig at 2,000
engine RPM
24 psig at 4,000
engine RPM
Active Fuel Management Relief Valve Oil
Pressure - as Measured at Oil Pressure Sensor
Location
379-517 kPa
Maximum
55-75 psig
Maximum
Oil Pan
Front Cover Alignment - at Oil Pan Surface
0.0-0.5 mm
0.0-0.02 in
Crankshaft Rear Oil Seal Housing Alignment -
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L - Cab & Chassis Sierra, Cab & Chassis Silverado,
Sierra & Silverado
at Oil Pan Surface
0.0-0.5 mm
0.0-0.02 in
Oil Pan Alignment - to Rear of Engine Block
at Transmission Bell Housing Mounting
Surface
0.0-0.1 mm
0.0-0.004 in
Piston Rings
Piston Ring End Gap - First Compression Ring
- Measured in Cylinder Bore - Production
0.23-0.44 mm
0.009-0.017 in
Piston Ring End Gap - First Compression Ring
- Measured in Cylinder Bore - Service
0.23-0.5 mm
0.009-0.0196 in
Piston Ring End Gap - Second Compression
Ring - Measured in Cylinder Bore - Production
0.44-0.7 mm
0.017-0.027 in
Piston Ring End Gap - Second Compression
Ring - Measured in Cylinder Bore - Service
0.44-0.76 mm
0.0173-0.03 in
Piston Ring End Gap - Oil Control Ring -
Measured in Cylinder Bore - Production
0.18-0.75 mm
0.007-0.029 in
Piston Ring End Gap - Oil Control Ring -
Measured in Cylinder Bore - Service
0.18-0.81 mm
0.007-0.032 in
Piston Ring-to-Groove Clearance - First
Compression Ring - Production
0.04-0.085 mm
0.00157-0.00335
in
Piston Ring-to-Groove Clearance - First
Compression Ring - Service
0.04-0.085 mm
0.00157-0.00335
in
Piston Ring-to-Groove Clearance - Second
Compression Ring - Production
0.04-0.078 mm
0.00157-0.0031 in
Piston Ring-to-Groove Clearance - Second
Compression Ring - Service
0.04-0.078 mm
0.00157-0.0031 in
Piston Ring-to-Groove Clearance - Oil Control
Ring - Production
0.012-0.2 mm
0.0005-0.0078 in
Piston Ring-to-Groove Clearance - Oil Control
Ring - Service
0.012-0.2 mm
0.0005-0.0078 in
Pistons and Pins
Pin - Piston Pin Clearance-to-Piston Pin Bore -
Production
0.002-0.01 mm
0.00008-0.0004 in
Pin - Piston Pin Clearance-to-Piston Pin Bore -
Service
0.002-0.015 mm 0.00008-0.0006 in
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L - Cab & Chassis Sierra, Cab & Chassis Silverado,
Sierra & Silverado
Pin - Piston Pin Diameter
23.952-23.955 mm
0.943-0.943 in
Pin - Piston Pin Fit in Connecting Rod Bore -
Production
0.007-0.02 mm
0.00027-0.00078
in
Pin - Piston Pin Fit in Connecting Rod Bore -
Service
0.007-0.022 mm
0.00027-0.00086
in
Piston - Piston Diameter - Measured Over
Skirt Coating
96.002-96.036 mm
3.779-3.78 in
Piston - Piston to Bore Clearance - Production
-0.036 to +0.016
mm
-0.0014 to
+0.0006 in
Piston - Piston to Bore Clearance - Service
Limit with Skirt Coating Worn Off
0.071 mm
0.0028 in
Valve System
Valves - Valve Face Angle
45 degrees
Valves - Valve Face Width
1.25 mm
0.05 in
Valves - Valve Lash
Net Lash - No Adjustment
Valve Lift - Exhaust - Non Active Fuel
Management
12.24 mm
0.488 in
Valve Lift - Exhaust - Active Fuel
Management
12.46 mm
0.491 in
Valve Lift - Intake - Non Active Fuel
Management
12.24 mm
0.488 in
Valve Lift - Intake - Active Fuel Management
12.46 mm
0.491 in
Valves - Valve Seat Angle
46 degrees
Valves - Valve Seat Runout
0.05 mm
0.002 in
Valves - Valve Seat Width - Exhaust
1.78 mm
0.07 in
Valves - Seat Width - Intake
1.02 mm
0.04 in
Valves - Valve Stem Diameter - Production
7.955-7.976 mm
0.313-0.314 in
Valves - Valve Stem Diameter - Service
7.95 mm
0.313 in
Valves - Valve Stem-to-Guide Clearance -
Production - Exhaust
0.025-0.066 mm
0.001-0.0026 in
Valves - Valve Stem-to-Guide Clearance -
Service - Exhaust
0.093 mm
0.0037 in
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L - Cab & Chassis Sierra, Cab & Chassis Silverado,
Sierra & Silverado
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