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Engine Mechanical - 8.1L: Specifications Chevrolet Silverado 3500

Mechanical

Fastener Tightening Specifications

ApplicationSpecification
MetricEnglish
Air Cleaner Outlet Duct Clamp4 N.m35 lb in
Air Conditioning (A/C) Belt Tensioner Bolt50 N.m37 lb ft
Battery Cable Channel Bolt9 N.m80 lb in
Camshaft Position (CMP) Sensor Bolt12 N.m106 lb in
Camshaft Retainer Bolt12 N.m106 lb in
Camshaft Sprocket Bolt30 N.m22 lb ft
Connecting Rod Nut - First Pass30 N.m22 lb ft
Connecting Rod Nut - Final Pass90 degrees
Crankshaft Balancer Bolt255 N.m189 lb ft
Crankshaft Bearing Cap Bolts - First Pass30 N.m22 lb ft
Crankshaft Bearing Cap Bolts - Final Pass90 degrees
Crankshaft Bearing Cap Studs - First Pass30 N.m22 lb ft
Crankshaft Bearing Cap Studs - Final Pass80 degrees
Crankshaft Oil Deflector Nut50 N.m37 lb ft
Crankshaft Position (CKP) Sensor Bolt12 N.m106 lb in
Crossbar Bolt100 N.m74 lb ft
Cylinder Head Bolts - In Sequence
First Pass30 N.m22 lb ft
Second Pass30 N.m + 120 degrees22 lb ft + 120 degrees
Final Pass - Long Bolts #1, 2, 3, 6, 7, 8, 9, 10, 11, 14, 16, 1760 degrees
Final Pass - Medium Bolts #15, 1845 degrees
Final Pass - Short Bolts #4, 5, 12, 1330 degrees
Cylinder Head Coolant Hole Plug50 N.m37 lb ft
Drive Belt Idler Pulley Bolt50 N.m37 lb ft
Drive Belt Tensioner Bolt50 N.m37 lb ft
Engine Block Coolant Drain Hole M28 Plug - Left Front60 N.m44 lb ft
Engine Block Coolant Drain Hole Plug - Side30 N.m22 lb ft
Engine Block Coolant Heater50 N.m37 lb ft
Engine Block Oil Gallery Plug - Front20 N.m15 lb ft
Engine Block Oil Gallery Plug - Rear30 N.m22 lb ft
Engine Block Oil Gallery Plug - Side30 N.m22 lb ft
Engine Block Oil Gallery Plug - Top20 N.m15 lb ft
Engine Coolant Crossover Bolt50 N.m37 lb ft
Engine Coolant Temperature (ECT) Sensor50 N.m37 lb ft
Engine Coolant Temperature (ECT) Sensor Bracket Bolt50 N.m37 lb ft
Engine Harness Bolt5 N.m44 lb in
Engine Harness Ground Bolt16 N.m12 lb ft
Engine Harness Stud10 N.m89 lb in
Engine Lift Bracket Bolt40 N.m30 lb ft
Engine Mount-to-Engine Bolt50 N.m37 lb ft
Engine Mount Bracket Thru Bolt75 N.m55 lb ft
Engine Mount-to-Engine Mount Bracket Bolt65 N.m50 lb ft
Engine Shield Bolt20 N.m15 lb ft
Engine Sight Shield Bracket Nut5 N.m44 lb in
Engine Wiring Harness Bolt16 N.m12 lb ft
Evaporative Emission (EVAP) Purge Valve Bolt8 N.m71 lb in
Exhaust Gas Recirculation (EGR) Valve Opening Cover Nut22 N.m16 lb ft
Exhaust Gas Recirculation (EGR) Valve Opening Cover Stud7 N.m62 lb in
Exhaust Manifold Center Bolt35 N.m26 lb ft
Exhaust Manifold Nut16 N.m12 lb ft
Exhaust Manifold Stud20 N.m15 lb ft
Exhaust Manifold Heat Shield Bolt25 N.m18 lb ft
Exhaust Manifold Heat Shield Nut25 N.m18 lb ft
Flywheel Bolt - First Pass40 N.m30 lb ft
Flywheel Bolt - Second Pass80 N.m59 lb ft
Flywheel Bolt - Final Pass100 N.m74 lb ft
Front Cover Bolt - First Pass6 N.m53 lb in
Front Cover Bolt - Final Pass12 N.m106 lb in
Fuel Rail Bolt/Stud12 N.m106 lb in
Heater Hose Bracket Bolt50 N.m37 lb ft
Hood Hinge Bolt25 N.m18 lb ft
Ignition Coil Bolt12 N.m106 lb in
Ignition Coil Wiring Harness Bolt12 N.m106 lb in
Intake Manifold Bolts - First Pass In Sequence5 N.m44 lb in
Intake Manifold Bolts - Second Pass In Sequence8 N.m71 lb in
Intake Manifold Bolts - Third Pass In Sequence12 N.m106 lb in
Intake Manifold Bolt - Final Pass In Sequence15 N.m11 lb ft
J 36857 Lift Bracket Bolt40 N.m30 lb ft
J 42847 Flywheel Holding Tool Bolt50 N.m37 lb ft
Knock Sensor20 N.m15 lb ft
Knock Sensor Heat Shield Bolt12 N.m106 lb in
Manifold Absolute Pressure (MAP) Sensor Bolt12 N.m106 lb in
Oil Cooler Hose Fittings23 N.m17 lb ft
Oil Fill Tube Bolt12 N.m106 lb in
Oil Filter38 N.m28 lb ft
Oil Filter Fitting66 N.m49 lb ft
Oil Level Indicator Tube Bolt25 N.m18 lb ft
Oil Level Sensor20 N.m15 lb ft
Oil Pan Bolt - First Pass10 N.m89 lb in
Oil Pan Bolt - Final Pass25 N.m18 lb ft
Oil Pan Drain Plug28 N.m21 lb ft
Oil Pan Skid Plate Bolt20 N.m15 lb ft
Oil Pressure Sensor30 N.m22 lb ft
Oil Pump Bolt75 N.m56 lb ft
Oil Pump Cover Bolt12 N.m106 lb in
Oil Pump Drive Bolt25 N.m18 lb ft
Power Steering Pump Bracket Bolt/Nut50 N.m37 lb ft
Power Steering Pump Bracket Stud20 N.m15 lb ft
Spark Plug30 N.m22 lb ft
Throttle Body Nut10 N.m89 lb in
Throttle Body Stud12 N.m106 lb in
Valve Lifter Guide Retainer Bolt25 N.m18 lb ft
Valve Rocker Arm Cover Bolt - First Pass6 N.m53 lb in
Valve Rocker Arm Cover Bolt - Final Pass12 N.m106 lb in
Valve Rocker Arm Nut35 N.m26 lb ft
Valve Rocker Arm Stud50 N.m37 lb ft
Water Outlet Bolt/Stud30 N.m22 lb ft
Water Pump Bolt - First Pass25 N.m18 lb ft
Water Pump Bolt - Final Pass50 N.m37 lb ft
Water Pump Pulley Bolt25 N.m18 lb ft

Fastener Tightening Specifications

Engine Mechanical Specifications

ApplicationSpecification
MetricEnglish
General
Engine TypeV8
Displacement8.1L496 CID
RPOL18
VING
Bore107.95 mm4.25 in
Stroke111.0 mm4.37 in
Compression Ratio9.1:1
Firing Order1-8-7-2-6-5-4-3
Spark Plug Gap1.52 mm0.06 in
Block
Crankshaft Main Bearing Bore Diameter74.606-74.622 mm2.9372-2.9379 in
Cylinder Bore Diameter - Production107.95-107.968 mm4.25-4.2507 in
Cylinder Bore Diameter - Service107.94-107.99 mm4.2496-4.2516 in
Cylinder Bore Out-of-Round - Production, Maximum Minus Minimum Bore Diameter0.018 mm0.0007 in
Cylinder Bore Out-of-Round - Service, Maximum Minus Minimum Bore Diameter0.05 mm0.002 in
Cylinder Bore Taper - Production0.018 mm0.0007 in
Cylinder Bore Taper - Service Thrust Axis0.05 mm0.002 in
Cylinder Bore Taper - Service Pin Axis0.05 mm0.002 in
Cylinder Head Deck Height - from Centerline of Crankshaft259.875-260.125 mm10.231-10.241 in
Cylinder Head Deck Surface Flatness - Entire Face0.1 mm0.004 in
Cylinder Head Deck Surface Flatness - Within 150 mm (6 in)0.05 mm0.002 in
Valve Lifter Bore Diameter21.417-21.443 mm0.843-0.844 in
Camshaft
Camshaft Bearing Inside Diameter49.548-49.573 mm1.9507-1.9517 in
Camshaft Journal Diameter49.472-49.522 mm1.9477-1.9497 in
Camshaft Lobe Lift - Exhaust6.973-7.075 mm0.2745-0.2785 in
Camshaft Lobe Lift - Intake6.924-7.026 mm0.2726-0.2766 in
Camshaft Runout - Production0.051 mm0.002 in
Camshaft Runout - Service0.076 mm0.003 in
Connecting Rod
Connecting Rod Bearing Clearance - Production0.033-0.068 mm0.0013-0.0027 in
Connecting Rod Bearing Clearance - Service0.033-0.081 mm0.0013-0.0032 in
Connecting Rod Side Clearance0.384-0.686 mm0.0151-0.027 in
Crankshaft
Connecting Rod Journal Diameter55.854-55.87 mm2.199-2.1996 in
Connecting Rod Journal Out-of-Round - Production0.0102 mm0.0004 in
Connecting Rod Journal Taper - Production0.0102 mm0.0004 in
Crankshaft End Play0.127-0.35 mm0.005-0.0138 in
Crankshaft Main Bearing Clearance - #1, #2, #3, #4 Production0.022-0.057 mm0.0008-0.0022 in
Crankshaft Main Bearing Clearance - #5 Production0.034-0.069 mm0.0013-0.0027 in
Crankshaft Main Bearing Clearance - #1, #2, #3, #4 Service0.022-0.089 mm0.0008-0.0035 in
Crankshaft Main Bearing Clearance - #5 Service Limit0.035-0.102 mm0.0014-0.004 in
Crankshaft Main Journal Diameter69.805-69.822 mm2.7482-2.7489 in
Crankshaft Main Journal Out-of-Round - Production0.0102 mm0.0004 in
Crankshaft Main Journal Taper - Production0.0102 mm0.0004 in
Crankshaft Runout - Production0.05 mm0.002 in
Crankshaft Runout - Service0.065 mm0.0026 in
Cylinder Head
Cylinder Head Height/Thickness259.875-260.125 mm10.231-10.241 in
Surface Flatness - Block Deck0.05 mm0.002 in
Surface Flatness - Exhaust Manifold Deck0.102 mm0.004 in
Surface Flatness - Intake Manifold Deck0.08 mm0.003 in
Exhaust Manifold
Surface Flatness0.254 mm0.01 in
Lubrication System
Oil Capacity - Without Filter5.7L6.0 Qts
Oil Capacity - With Filter6.15L6.5 Qts
Oil Pressure - Minimum34 kPa @ 1,000 RPM5 psi @ 1,000 RPM
Oil Pressure - Minimum69 kPa @ 2,000 RPM10 psi @ 2,000 RPM
Piston Rings
Piston Ring End Gap
First Compression Ring - Production0.3-0.45 mm0.012-0.018 in
First Compression Ring - Service0.45-0.675 mm0.018-0.027 in
Second Compression Ring - Production0.45-0.65 mm0.017-0.025 in
Second Compression Ring - Service0.675-0.975 mm0.026-0.039 in
Oil Control Ring - Production0.249-0.759 mm0.0098-0.0299 in
Oil Control Ring - Service0.373-1.138 mm0.015-0.045 in
Piston Ring-to-Groove Clearance
First Compression Ring0.031-0.074 mm0.0012-0.0029 in
Second Compression Ring0.031-0.074 mm0.0012-0.0029 in
Oil Control Ring0.051-0.203 mm0.002-0.008 in
Piston and Pins
Piston
Piston DiameterNot MeasurableNot Measurable
Piston-to-Bore ClearanceInterference FitInterference Fit
Pin
Pin-Piston Pin Fit in Connecting Rod Bore-Production0.010-0.023 mm0.0004-0.0009 in
Pin-Piston Pin Fit in Connecting Rod Bore-Service0.010-0.023 mm0.0004-0.0009 in
Pin-Piston Pin Clearance-to-Piston Pin Bore-Production0.003-0.011 mm0.00019-0.00043 in
Pin-Piston Pin Clearance-to-Piston Pin Bore-Service0.003-0.011 mm0.00019-0.00043 in
Pin-Piston Pin Diameter26.416-26.419 mm1.039-1.040 in
Valve System
Valves
Valve Face Angle - Exhaust45 degrees
Valve Face Angle - Intake45 degrees
Valve Head Diameter - Exhaust43.69 mm1.72 in
Valve Head Diameter - Intake55.63 mm2.19 in
Valve Lash - ExhaustNet LashNet Lash
Valve Lash - IntakeNet LashNet Lash
Valve Seat Angle - Exhaust46 degrees
Valve Seat Angle - Intake46 degrees
Valve Seat Runout - Exhaust0.05 mm0.002 in
Valve Seat Runout - Intake0.05 mm0.002 in
Valve Seat Width - Exhaust1.651-2.159 mm0.060-0.095 in
Valve Seat Width - Intake0.8-1.2 mm0.03-0.06 in
Valve Stem Diameter - Exhaust9.431-9.449 mm0.3713-0.372 in
Valve Stem Diameter - Intake9.436-9.454 mm0.3715-0.3722 in
Valve Stem-to-Guide Clearance - Exhaust - Production0.03-0.079 mm0.0012-0.0031 in
Valve Stem-to-Guide Clearance - Intake - Production0.025-0.074 mm0.001-0.0029 in
Valve Stem-to-Guide Clearance - Exhaust - Service0.03-0.104 mm0.0012-0.0041 in
Valve Stem-to-Guide Clearance - Intake - Service0.025-0.099 mm0.001-0.0039 in
Rocker Arms
Valve Rocker Arm Ratio1.7:1
Valve Springs
Valve Spring Free Length56.35 mm2.218 in
Valve Spring Installed Height45.92-46.69 mm1.808-1.838 in
Valve Spring Load - Closed381-419 N at 45.92 mm86-94 lb at 1.808 in
Valve Spring Load - Open964-1056 N at 33.99 mm216-236 lb at 1.338 in

Engine Mechanical Specifications

Torque Values and/or Fastener Tightening Strategies

No torque or fastener tightening changes from the previous year. Refer to Fastener Tightening Specifications .

Changed Engine Specifications

No changed engine specifications. Refer to Engine Mechanical Specifications .

More articles — Engine Mechanical - 8.1L