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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
25 N·m 18 lb ft
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
50 N·m 37 lb ft
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
60 N·m 44 lb ft
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
55 N·m 41 lb ft
55 N·m 41 lb ft
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
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