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3900 Engine Specifications

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  • 3900 Engine Specifications

    3900 Engine Mechanical Specifications
    Application Specification
    Metric English
    General Data
    Engine Type 60 degree V-6
    Displacement 3.9L 238 cu in
    RPO LZ9
    VIN 1
    Bore 99 mm 3.90 in
    Stroke 84 mm 3.31 in
    Compression Ratio 9.8:1
    Firing Order 123456
    Spark Plug Gap 1.00 mm 0.040 in
    Block
    Camshaft Bearing Bore Diameter - Front and Rear 55.26-55.31 mm 2.175-2.177 in
    Camshaft Bearing Bore Diameter - Middle #2, #3 54.75-54.80 mm 2.155-2.157 in
    Crankshaft Main Bearing Bore Diameter 72.1535-72.0695 mm 2.840-2.841 in
    Crankshaft Main Bearing Bore Out-of-Round 0.008 mm 0.00031 in
    Cylinder Bore Diameter 99.000-99.018 mm 3.897-3.898 in
    Cylinder Bore Out-of-Round - Diameter - Production 0.026 mm 0.0010 in
    Cylinder Bore Out-of-Round - Diameter - Service 0.030 mm 0.0011 in
    Cylinder Bore Taper - Production 0.026 mm 0.0010 in
    Cylinder Bore Taper - Service 0.030 mm 0.0011 in
    Cylinder Head Deck Height 224 mm 8.818 in
    Cylinder Head Deck Surface Flatness 0.05 mm per 150 mm 0.0019 in per 5.905 in
    Valve Lifter Bore Diameter 21.417-21.455 mm 0.843-0.844 in
    Camshaft
    Camshaft Bearing Inside Diameter 51.500-51.525 mm 2.028-2.029 in
    Camshaft Journal Diameter 51.415-51.440 mm 2.024-2.025 in
    Camshaft Journal Out-of-Round 0.025 mm 0.001 in
    Camshaft Lobe Lift - Exhaust 6.9263 mm 0.2727 in
    Camshaft Lobe Lift - Intake 6.9263 mm 0.2727 in
    Cooling System
    Thermostat Full Open Temperature 195 degrees
    Connecting Rod
    Connecting Rod Bearing Clearance 0.018-0.062 mm 0.0007-0.0024 in
    Connecting Rod Bore Diameter 60.322-60.338 mm 2.375-2.376 in
    Connecting Rod Bore Out-of-Round 0.006 mm 0.00023 in
    Connecting Rod Length - Center to Center 150 mm 5.9 in
    Connecting Rod Side Clearance 0.200-0.241 mm 0.008-0.009 in
    Crankshaft
    Connecting Rod Journal Diameter 57.122-57.138 mm 2.248-2.249 in
    Connecting Rod Journal Out-of-Round 0.005 mm 0.0002 in
    Connecting Rod Journal Taper 0.005 mm 0.0002 in
    Connecting Rod Journal Width 21.92-22.08 mm 0.863-0.869 in
    Crankshaft End Play 0.060-0.210 mm 0.0024-0.0083 in
    Crankshaft Main Bearing Clearance - Except #3 0.019-0.064 mm 0.0008-0.0025 in
    Crankshaft Main Bearing Clearance - #3 Thrust Bearing 0.032-0.077 mm 0.0012-0.0030 in
    Crankshaft Main Journal Out-of-Round 0.005 mm 0.0002 in
    Crankshaft Main Journal Taper 0.005 mm 0.0002 in
    Crankshaft Rear Flange Runout 0.04 mm 0.0016 in
    Cylinder Head
    Combustion Chamber Depth - at Measurement Point 2.2 mm 0.087 in
    Surface Finish - Maximum 2.8 RA
    Surface Flatness - Block Deck 0.08 mm per 152 mm 0.003 in per 6 in
    Surface Flatness - Exhaust Manifold Deck 0.1 mm 0.004 in
    Surface Flatness - Intake Manifold Deck 0.1 mm 0.004 in
    Valve Guide Bore - Exhaust 8.01 mm 0.315 in
    Valve Guide Bore - Intake 8.01 mm 0.315 in
    Valve Guide Installed Height 16.6 mm 0.654 in
    Lubrication System
    Oil Capacity - with Filte 3.8 liter 4.0 quarts
    Oil Pressure - @ 1850 RPM 207-310 kPa 30-45 PSI
    Oil Pump
    Gear Diameter 38.05-38.10 mm 1.498-1.500 in
    Gear Pocket - Dept 30.52-30.58 mm 1.202-1.204 in
    Gear Pocket - Diameter 38.176-38.226 mm 1.503-1.505 in
    Gears Lash 0.094-0.195 mm 0.0037-0.0077 in
    Relief Valve-to-Bore Clearance 0.038-0.089 mm 0.0015-0.0035 in
    Pin
    Piston Pin Clearance to Connecting Rod Bore - Press Fit -0.004 to -0.021 mm -0.0001 to -0.0008 in
    Piston Pin Clearance to Piston Pin Bore 0.002-0.010 mm 0.00008-0.0004 in
    Piston Pin Diameter 23.952-23.955 mm 0.942-0.943 in
    Piston Pin Length 64.21-64.44 mm 2.57-2.53 in
    Piston
    Piston Diameter - Production 98.970-99.008 mm 3.896-3.897 in
    Piston Diameter - Service Limit 98.950 mm 3.895 in
    Piston Pin Bore Diameter 23.957-23.962 mm 0.943 in
    Piston Ring Groove Width 1.22-1.24 mm 0.048-0.049 in
    Piston to Bore Clearance - Production -0.008 to +0.048 mm -0.0003 to +0.0018 in
    Piston to Bore Clearance - Service Limit - Maximum 0.080 mm 0.003 in
    Piston Ring End Gap
    First Compression Ring 0.15-0.30 mm 0.006-0.011 in
    Second Compression Ring 0.25-0.45 mm 0.009-0.017 in
    Oil Control Ring 0.15-0.65 mm 0.06-0.025 in
    Piston Ring to Groove Clearance
    First Compression Ring 0.03-0.065 mm 0.001-0.002 in
    Second Compression Ring 0.02-0.055 mm 0.0007-0.002 in
    Oil Control Ring 0.01 mm 0.004 in
    Piston Ring Thickness
    First Compression Ring 1.175-1.190 mm 0.046-0.047 in
    Second Compression Ring 1.475-1.490 mm 0.058 in
    Oil Control Ring - Maximum 2.50 mm 0.098 in
    Valves
    Valve Face Angle 45 degrees
    Valve Seat Angle 46 degrees
    Valve Seat Depth - Exhaust - From Deck Face 8.9-9.1 mm 0.350-0.358 in
    Valve Seat Depth - Intake - From Deck Face 7.9-8.1 mm 0.311-0.318 in
    Valve Seat Width - Exhaust 1.70-2.0 mm 0.067-0.079 in
    Valve Seat Width - Intake 1.55-1.80 mm 0.061-0.071 in
    Valve Stem-to-Guide Clearance 0.026-0.068 mm 0.0010-0.0027 in
    Valve Lifters/Push Rods
    Push Rod Length - Intake 146.0 mm 5.75 in
    Push Rod Length - Exhaust 152.5 mm 6.0 in
    Valve Springs
    Valve Spring Free Length 48.5 mm 1.89 in
    Valve Spring Installed Height 43.2 mm 1.701 in
    Valve Spring Load - Closed 320 N 43.2 mm 75 lb 1.701 in
    Valve Spring Load - Open 1036 N 32 mm 230 lb 1.260 in
    Valve Spring Total Number of Coils 6.55

    Fastener Tightening Specifications
    Application Specification
    Metric English
    Camshaft Position Sensor Bolt 10 N·m 89 lb in
    Camshaft Sprocket Bolt 140 N·m 103 lb ft
    Camshaft Thrust Plate Screw 10 N·m 89 lb in
    Connecting Rod Bearing Cap Bolt
    • First Pass
    25 N·m 18 lb ft
    • Final Pass
    110 degrees
    Coolant Drain Plug 19 N·m 14 lb ft
    Coolant Temperature Sensor 23 N·m 17 lb ft
    Crankshaft Balancer Bolt 160 N·m 118 lb ft
    Crankshaft Main Bearing Cap Bolt/Stud
    • First Pass
    50 N·m 37 lb ft
    • Final Pass
    77 degrees
    Crankshaft Oil Deflector Nut 25 N·m 18 lb ft
    Crankshaft Position Sensor Stud - Side of Engine Block 10 N·m 89 lb in
    Cylinder Head Bolt
    • First Pass
    60 N·m 44 lb ft
    • Final Pass
    95 degrees
    Cylinder Head Plug 20 N·m 15 lb ft
    Drive Belt Tensioner Bolt 50 N·m 37 lb ft
    EGR Valve Assembly Bolt 30 N·m 22 lb ft
    EGR Valve Pipe Bolt - EGR 25 N·m 18 lb ft
    EGR Valve Pipe Bolt - Exhaust Manifold 30 N·m 22 lb ft
    Engine Front Cover Bolt
    • Large Bolt
    55 N·m 41 lb ft
    • Medium Bolt
    55 N·m 41 lb ft
    • Small Bolt
    27 N·m 20 lb ft
    Engine Mount Strut and A/C Compressor Bracket Bolt 50 N·m 37 lb ft
    Engine Mount Strut and Generator Bracket Bolt 50 N·m 37 lb ft
    Engine Mount Strut and Lift Bracket Bolt - Engine Lift Rear 50 N·m 37 lb ft
    Engine Mount Strut and Support Bracket Bolt 25 N·m 18 lb ft
    Engine Oil Pressure Indicator Switch 16 N·m 12 lb ft
    Engine Wiring Harness Bracket Bolt 13 N·m 115 lb in
    EVAP Purge Valve Bolt 10 N·m 89 lb in
    Exhaust Manifold Heat Shield Bolt 10 N·m 89 lb in
    Exhaust Manifold Nut 16 N·m 12 lb ft
    Exhaust Manifold Stud 18 N·m 13 lb ft
    Flywheel Bolt 70 N·m 52 lb ft
    Front Oil Gallery Plug - Small 19 N·m 14 lb ft
    Front Oil Gallery Plug - Large 33 N·m 24 lb ft
    Fuel Feed Pipe to Fuel Injector Rail Bolt 10 N·m 89 lb in
    Fuel Injector Rail Bolt 10 N·m 89 lb in
    Heated Oxygen Sensor 42 N·m 31 lb ft
    Heater Inlet Pipe Nut 25 N·m 18 lb ft
    Heater Inlet Pipe Stud 35 N·m 26 lb ft
    Ignition Coil Bracket Bolt/Nut/Stud 25 N·m 18 lb ft
    Intake Manifold Coolant Pipe Bolt 10 N·m 89 lb in
    Knock Sensor 25 N·m 18 lb ft
    Lower Intake Manifold Bolt - Center 20 N·m 15 lb ft
    Lower Intake Manifold Bolt - Corner 25 N·m 18 lb ft
    MAP Sensor Bolt 10 N·m 89 lb in
    Oil Filter 30 N·m 22 lb ft
    Oil Filter Adapter Bolt 25 N·m 18 lb ft
    Oil Filter Bypass Hole Plug 19 N·m 14 lb ft
    Oil Filter Fitting 39 N·m 29 lb ft
    Oil Level Indicator Tube Bolt 25 N·m 18 lb ft
    Oil Pan Bolt 25 N·m 18 lb ft
    Oil Pan Drain Plug 25 N·m 18 lb ft
    Oil Pan Side Bolt 50 N·m 37 lb ft
    Oil Pump Cover Bolt 10 N·m 89 lb in
    Oil Pump Drive Clamp Bolt 36 N·m 27 lb ft
    Oil Pump Mounting Bolt 41 N·m 30 lb ft
    PCV Tube Clip bolt - Foul Air 10 N·m 89 lb in
    Piston Oil Nozzle Bolt 10 N·m 89 lb in
    Rear Oil Gallery Plug - 1/4 inch 19 N·m 14 lb ft
    Rear Oil Gallery Plug - 3/8 inch 33 N·m 24 lb ft
    Spark Plug 15 N·m 11 lb ft
    Thermostat Bypass Pipe to Engine Front Cover Bolt 10 N·m 89 lb in
    Thermostat Bypass Pipe to Throttle Body Nut/Bolt 10 N·m 89 lb in
    Throttle Body Bolt 10 N·m 89 lb in
    Throttle Body Stud 6 N·m 53 lb in
    Timing Chain Dampener Bolt 21 N·m 15 lb ft
    Upper Intake Manifold Bolt/Stud 25 N·m 18 lb ft
    Valve Lifter Guide Bolt 10 N·m 89 lb in
    Valve Rocker Arm Bolt 32 N·m 24 lb ft
    Valve Rocker Arm Cover Bolt 10 N·m 89 lb in
    Water Outlet Bolt 25 N·m 18 lb ft
    Water Pump Bolt 10 N·m 89 lb in
    Water Pump Pulley Bolt 25 N·m 18 lb ft
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