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ENGINE MECHANICAL SPECIFICATIONS (RPO LC9 VIN 3) Valve Lift - Exhaust - Active Fuel 12.46 mm 0.491 in Valve Lift - Intake - Non Active Fuel 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 - 0.025-0.066 mm 0.001-0.0026 in Valves - Valve Stem-to-Guide Clearance - 0.093 mm 0.0037 in Valves - Valve Stem-to-Guide Clearance - 0.025-0.066 mm 0.001-0.0026 in Valves - Valve Stem-to-Guide Clearance - 0.093 mm 0.0037 in Rocker Arms - Valve Rocker Arm Ratio 1.70:1 Valve Springs - Valve Spring Free Length 52.9 mm 2.08 in Valve Springs - Valve Spring Installed Height 45.75 mm 1.8 in Valve Springs - Valve Spring Load - Closed 340 N at 45.75 mm 76 lb at 1.8 in Valve Springs - Valve Spring Load - Open 980 N at 33.55 mm 220 lb at 1.32 in Application Specification Metric English General Engine Type V8
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
Displacement 5.3L 325 CID RPO LC9 VIN 3 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 Active Fuel Management Cylinders 1-4-6-7 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 234.57-234.82 mm 9.235-9.245 in Cylinder Head Deck Surface Flatness - 0.11 mm 0.004 in Cylinder Head Deck Surface Flatness - 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 - Exhaust - Non Active 7.2 mm 0.283 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
Camshaft Lobe Lift - Exhaust - Active Fuel 7.33 mm 0.289 in Camshaft Lobe Lift - Intake - Non Active Fuel 7.2 mm 0.283 in Camshaft Lobe Lift - Intake - Active Fuel 7.33 mm 0.289 in Camshaft Runout - Measured at the 0.05 mm 0.002 in Connecting Rod Connecting Rod Bearing Clearance - 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 0.004-0.008 mm 0.00015-0.0003 in Connecting Rod Bore Out-of-Round - Bearing 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 - 0.005 mm 0.0002 in Connecting Rod Journal Out-of-Round - 0.01 mm 0.0004 in Connecting Rod Journal Taper - Maximum for 0.005 mm 0.0002 in Connecting Rod Journal Taper - Maximum for 0.02 mm 0.00078 in Crankshaft End Play 0.04-0.2 mm 0.0015-0.0078 in Crankshaft Main Bearing Clearance - 0.02-0.052 mm 0.0008-0.0021 in 0.02-0.065 mm 0.0008-0.0025 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 Main Bearing Clearance - Service Crankshaft Main Journal Diameter - 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 - 0.003 mm 0.000118 in Crankshaft Main Journal Out-of-Round - 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 0.7 mm 0.028 in Crankshaft Thrust Surface - Production 26.14-26.22 mm 1.029-1.0315 in 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 120.2 mm 4.732 in Surface Flatness - Block Deck - Measured 0.08 mm 0.003 in Surface Flatness - Block Deck - Measuring the 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 17.32 mm 0.682 in Intake Manifold Surface Flatness - Measured at Gasket Sealing 0.3 mm 0.118 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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