> 3900 Engine Specifications

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3900 Engine Specifications

3900 Engine Mechanical Specifications

Application	Specification
Application	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
Application	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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