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Engine Mechanical Specifications

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Engine Mechanical Specifications

Application Specification
Metric English
General
  • Engine Type
 V8
  • Displacement
 8.1L 496 CID
  • RPO
 L18
  • VIN
 G
  • Bore
 107.95 mm 4.25 in
  • Stroke
 111.0 mm 4.37 in
  • Compression Ratio
 9.1:1
  • Firing Order
 1-8-7-2-6-5-4-3
  • Spark Plug Gap
 1.52 mm 0.06 in
Block
  • Crankshaft Main Bearing Bore Diameter
 74.606-74.622 mm 2.9372-2.9379 in
  • Cylinder Bore Diameter - Production
 107.95-107.968 mm 4.25-4.2507 in
  • Cylinder Bore Diameter - Service
 107.94-107.99 mm 4.2496-4.2516 in
  • Cylinder Bore Out-of-Round - Production, Maximum Minus Minimum Bore Diameter
 0.018 mm 0.0007 in
  • Cylinder Bore Out-of-Round - Service, Maximum Minus Minimum Bore Diameter
 0.05 mm 0.002 in
  • Cylinder Bore Taper - Production
 0.018 mm 0.0007 in
  • Cylinder Bore Taper - Service Thrust Axis
 0.05 mm 0.002 in
  • Cylinder Bore Taper - Service Pin Axis
 0.05 mm 0.002 in
  • Cylinder Head Deck Height - from Centerline of Crankshaft
 259.875-260.125 mm 10.231-10.241 in
  • Cylinder Head Deck Surface Flatness - Entire Face
 0.1 mm 0.004 in
  • Cylinder Head Deck Surface Flatness - Within 150 mm (6 in)
 0.05 mm 0.002 in
  • Valve Lifter Bore Diameter
 21.417-21.443 mm 0.843-0.844 in
Camshaft
  • Camshaft Bearing Inside Diameter
 49.548-49.573 mm 1.9507-1.9517 in
  • Camshaft Journal Diameter
 49.472-49.522 mm 1.9477-1.9497 in
  • Camshaft Lobe Lift - Exhaust
 6.973-7.075 mm 0.2745-0.2785 in
  • Camshaft Lobe Lift - Intake
 6.924-7.026 mm 0.2726-0.2766 in
  • Camshaft Runout - Production
 0.051 mm 0.002 in
  • Camshaft Runout - Service
 0.076 mm 0.003 in
Connecting Rod
  • Connecting Rod Bearing Clearance - Production
 0.033-0.068 mm 0.0013-0.0027 in
  • Connecting Rod Bearing Clearance - Service
 0.033-0.081 mm 0.0013-0.0032 in
  • Connecting Rod Side Clearance
 0.384-0.686 mm 0.0151-0.027 in
Crankshaft
  • Connecting Rod Journal Diameter
 55.854-55.87 mm 2.199-2.1996 in
  • Connecting Rod Journal Out-of-Round - Production
 0.0102 mm 0.0004 in
  • Connecting Rod Journal Taper - Production
 0.0102 mm 0.0004 in
  • Crankshaft End Play
 0.127-0.35 mm 0.005-0.0138 in
  • Crankshaft Main Bearing Clearance - #1, #2, #3, #4 Production
 0.022-0.057 mm 0.0008-0.0022 in
  • Crankshaft Main Bearing Clearance - #5 Production
 0.034-0.069 mm 0.0013-0.0027 in
  • Crankshaft Main Bearing Clearance - #1, #2, #3, #4 Service
 0.022-0.089 mm 0.0008-0.0035 in
  • Crankshaft Main Bearing Clearance - #5 Service Limit
 0.035-0.102 mm 0.0014-0.004 in
  • Crankshaft Main Journal Diameter
 69.805-69.822 mm 2.7482-2.7489 in
  • Crankshaft Main Journal Out-of-Round - Production
 0.0102 mm 0.0004 in
  • Crankshaft Main Journal Taper - Production
 0.0102 mm 0.0004 in
  • Crankshaft Runout - Production
 0.05 mm 0.002 in
  • Crankshaft Runout - Service
 0.065 mm 0.0026 in
Cylinder Head
  • Cylinder Head Height/Thickness
 259.875-260.125 mm 10.231-10.241 in
  • Surface Flatness - Block Deck
 0.05 mm 0.002 in
  • Surface Flatness - Exhaust Manifold Deck
 0.102 mm 0.004 in
  • Surface Flatness - Intake Manifold Deck
 0.08 mm 0.003 in
Exhaust Manifold
  • Surface Flatness
 0.254 mm 0.01 in
Lubrication System
  • Oil Capacity - Without Filter
 5.7L 6.0 Qts
  • Oil Capacity - With Filter
 6.15L 6.5 Qts
  • Oil Pressure - Minimum
 34 kPa @ 1, 000 RPM 5 psi @ 1, 000 RPM
  • Oil Pressure - Minimum
 69 kPa @ 2, 000 RPM 10 psi @ 2, 000 RPM
Piston Rings
Piston Ring End Gap
  • First Compression Ring - Production
 0.3-0.45 mm 0.012-0.018 in
  • First Compression Ring - Service
 0.45-0.675 mm 0.018-0.027 in
  • Second Compression Ring - Production
 0.45-0.65 mm 0.017-0.025 in
  • Second Compression Ring - Service
 0.675-0.975 mm 0.026-0.039 in
  • Oil Control Ring - Production
 0.249-0.759 mm 0.0098-0.0299 in
  • Oil Control Ring - Service
 0.373-1.138 mm 0.015-0.045 in
Piston Ring-to-Groove Clearance
  • First Compression Ring
 0.031-0.074 mm 0.0012-0.0029 in
  • Second Compression Ring
 0.031-0.074 mm 0.0012-0.0029 in
  • Oil Control Ring
 0.051-0.203 mm 0.002-0.008 in
Piston and Pins
Piston
  • Piston Diameter
 Not Measurable Not Measurable
  • Piston-to-Bore Clearance
 Interference Fit Interference Fit
Pin
  • Pin-Piston Pin Fit in Connecting Rod Bore-Production
 0.010-0.023 mm 0.0004-0.0009 in
  • Pin-Piston Pin Fit in Connecting Rod Bore-Service
 0.010-0.023 mm 0.0004-0.0009 in
  • Pin-Piston Pin Clearance-to-Piston Pin Bore-Production
 0.003-0.011 mm 0.00019-0.00043 in
  • Pin-Piston Pin Clearance-to-Piston Pin Bore-Service
 0.003-0.011 mm 0.00019-0.00043 in
  • Pin-Piston Pin Diameter
 26.416-26.419 mm 1.039-1.040 in
Valve System
Valves
  • Valve Face Angle - Exhaust
 45 degrees
  • Valve Face Angle - Intake
 45 degrees
  • Valve Head Diameter - Exhaust
 43.69 mm 1.72 in
  • Valve Head Diameter - Intake
 55.63 mm 2.19 in
  • Valve Lash - Exhaust
 Net Lash Net Lash
  • Valve Lash - Intake
 Net Lash Net Lash
  • Valve Seat Angle - Exhaust
 46 degrees
  • Valve Seat Angle - Intake
 46 degrees
  • Valve Seat Runout - Exhaust
 0.05 mm 0.002 in
  • Valve Seat Runout - Intake
 0.05 mm 0.002 in
  • Valve Seat Width - Exhaust
 1.651-2.159 mm 0.060-0.095 in
  • Valve Seat Width - Intake
 0.8-1.2 mm 0.03-0.06 in
  • Valve Stem Diameter - Exhaust
 9.431-9.449 mm 0.3713-0.372 in
  • Valve Stem Diameter - Intake
 9.436-9.454 mm 0.3715-0.3722 in
  • Valve Stem-to-Guide Clearance - Exhaust - Production
 0.03-0.079 mm 0.0012-0.0031 in
  • Valve Stem-to-Guide Clearance - Intake - Production
 0.025-0.074 mm 0.001-0.0029 in
  • Valve Stem-to-Guide Clearance - Exhaust - Service
 0.03-0.104 mm 0.0012-0.0041 in
  • Valve Stem-to-Guide Clearance - Intake - Service
 0.025-0.099 mm 0.001-0.0039 in
Rocker Arms
  • Valve Rocker Arm Ratio
 1.7:1
Valve Springs
  • Valve Spring Free Length
 56.35 mm 2.218 in
  • Valve Spring Installed Height
 45.92-46.69 mm 1.808-1.838 in
  • Valve Spring Load - Closed
 381-419 N at 45.92 mm 86-94 lb at 1.808 in
  • Valve Spring Load - Open
 964-1056 N at 33.99 mm 216-236 lb at 1.338 in
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