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Engine Mechanical - 3.9l - Specifications Chevrolet Impala IX

Mechanical

Fastener Tightening Specifications

ApplicationSpecification
MetricEnglish
A/C Compressor Bracket Bolt50 N.m37 lb ft
Camshaft Position Actuator Assembly Bolt16 N.m12 lb ft
Camshaft Position Actuator Magnet Bolt10 N.m89 lb in
Camshaft Position Sensor Bolt10 N.m89 lb in
Camshaft Thrust Plate Screw10 N.m89 lb in
Clutch Pressure Plate Bolt25 N.m18 lb ft
Connecting Rod Bearing Cap Bolt
First Pass25 N.m18 lb ft
Final Pass110 degrees
Coolant Crossover Pipe Bolt50 N.m37 lb ft
Coolant Drain Plug19 N.m14 lb ft
Coolant Temperature Sensor20 N.m15 lb ft
Coolant Vent Pipe Bolt10 N.m89 lb in
Crankshaft Balancer Bolt
Installation Pass Using the Old Bolt to Ensure the Balancer is Completely Installed125 N.m92 lb ft
First Pass - Install a NEW Bolt After the Installation Pass and Tighten as Described in the First and Final Passes125 N.m92 lb ft
Final Pass130 degrees
Crankshaft Main Bearing Cap Bolt/Stud
First Pass50 N.m37 lb ft
Final Pass77 degrees
Crankshaft Oil Deflector Nut25 N.m18 lb ft
Crankshaft Position Sensor Stud10 N.m89 lb in
Cylinder Head Bolt
First Pass60 N.m44 lb ft
Final Pass140 degrees
Drive Belt Idler Pulley Bolt - 13 mm30 N.m22 lb ft
Drive Belt Idler Pulley Bolt - 15 mm50 N.m37 lb ft
Drive Belt Idler Pulley Bolts50 N.m37 lb ft
Drive Belt Tensioner Bolt50 N.m37 lb ft
Engine Block Heater/Plug60 N.m44 lb ft
Engine Front Cover Bolt25 N.m18 lb ft
Engine Lift Bracket Bolt70 N.m52 lb ft
Engine Mount Bracket Bolts58 N.m43 lb ft
Engine Mount Bracket to Engine Mount Bolts50 N.m37 lb ft
Engine Mount Bracket to Oil Pan Bolts58 N.m43 lb ft
Engine Mount to Frame47 N.m35 lb ft
Engine Mount Strut Bracket Through Bolt50 N.m37 lb ft
Engine Mount Strut to Engine Bolts50 N.m37 lb ft
Engine Mount Strut to Radiator Support Bolts (M8)26 N.m19 lb ft
Engine Mount Strut to Radiator Support Bolts (M10)58 N.m43 lb ft
Engine Mount Upper and Lower Nuts50 N.m37 lb ft
Engine Oil Pressure Indicator Switch16 N.m12 lb ft
Engine Wiring Harness Bracket Bolt13 N.m115 lb in
EVAP Purge Valve Bolt12 N.m106 lb in
Exhaust Manifold Bolt20 N.m15 lb ft
Exhaust Manifold Heat Shield Bolt10 N.m89 lb in
Exhaust Manifold Lower Heat Shield Bolt10 N.m89 lb in
Flywheel Bolt70 N.m52 lb ft
Front Oil Gallery Plug33 N.m24 lb ft
Fuel Injector Rail Bolt10 N.m89 lb in
Heated Oxygen Sensor42 N.m31 lb ft
Heater Inlet and Outlet Pipe Bolt - 10 mm10 N.m89 lb in
Heater Inlet and Outlet Pipe Bolt/Nut - 13 mm25 N.m18 lb ft
Ignition Coil Bracket Bolt/Nut/Stud25 N.m18 lb ft
Knock Sensor25 N.m18 lb ft
Lower Intake Manifold Bolt - Center
First Pass7 N.m62 lb in
Final Pass16 N.m12 lb ft
Lower Intake Manifold Bolt - Corner
First Pass13 N.m10 lb ft
Final Pass25 N.m18 lb ft
Oil Filter30 N.m22 lb ft
Oil Filter Adapter Bolt25 N.m18 lb ft
Oil Filter Fitting39 N.m29 lb ft
Oil Level Indicator Tube Bolt25 N.m18 lb ft
Oil Pan Bolt25 N.m18 lb ft
Oil Pan Drain Plug25 N.m18 lb ft
Oil Pan Side Bolt
First Pass50 N.m37 lb ft
Final Pass50 degrees
Oil Pan Support Bracket Bolt50 N.m37 lb ft
Oil Pump Cover Bolt10 N.m89 lb in
Oil Pump Drive Bolt36 N.m27 lb ft
Oil Pump Mounting Bolt41 N.m30 lb ft
Piston Oil Nozzle Bolt10 N.m89 lb in
Rear Oil Gallery Plug - 3/8 inch33 N.m24 lb ft
Spark Plug15 N.m11 lb ft
Throttle Body Bolt/Nut10 N.m89 lb in
Throttle Body Stud6 N.m53 lb in
Timing Chain Tensioner Bolt21 N.m15 lb ft
Transmission to Engine Bolts75 N.m55 lb ft
Transmission to Engine Brace Bolts43 N.m32 lb ft
Transmission Torque Converter Cover Bolts10 N.m89 lb in
Transmission Torque Converter to Flex Plate Bolts63 N.m47 lb ft
Upper Intake Manifold Bolt/Stud25 N.m18 lb ft
Valve Lifter Guide Bolt10 N.m89 lb in
Valve Lifter Oil Manifold Cover Plate Bolt25 N.m18 lb ft
Valve Rocker Arm Bolt34 N.m25 lb ft
Valve Rocker Arm Cover Bolt10 N.m89 lb in
Water Inlet Bolt/Stud10 N.m89 lb in
Water Pump Bolt25 N.m18 lb ft
Water Pump Pulley Bolt25 N.m18 lb ft
Wiring Harness Clamp Bolt20 N.m15 lb ft

Engine Mechanical Specifications

ApplicationSpecification
MetricEnglish
General Data
Engine Type60 degree V-6
Displacement3.9L (E85)238 cu in
RPOLGD
VINM (LGD)
Bore99 mm3.90 in
Stroke84 mm3.31 in
Compression Ratio9.8:1
Firing Order123456
Spark Plug Gap1.00 mm0.040 in
Block
Camshaft Bearing Bore Diameter - Front and Rear55.26-55.31 mm2.175-2.177 in
Camshaft Bearing Bore Diameter - Middle #2, #354.75-54.80 mm2.155-2.157 in
Crankshaft Main Bearing Bore Diameter72.1535-72.0695 mm2.840-2.841 in
Crankshaft Main Bearing Bore Out-of-Round0.008 mm0.00031 in
Cylinder Bore Diameter99.000-99.018 mm3.897-3.898 in
Cylinder Bore Out-of-Round - Diameter - Production0.026 mm0.0010 in
Cylinder Bore Out-of-Round - Diameter - Service0.030 mm0.0011 in
Cylinder Bore Taper - Production0.026 mm0.0010 in
Cylinder Bore Taper - Service0.030 mm0.0011 in
Cylinder Head Deck Height224 mm8.818 in
Cylinder Head Deck Surface Flatness0.05 mm per 150 mm0.0019 in per 5.905 in
Valve Lifter Bore Diameter21.417-21.455 mm0.843-0.844 in
Camshaft
Camshaft Bearing Inside Diameter51.500-51.525 mm2.028-2.029 in
Camshaft Journal Diameter51.415-51.440 mm2.024-2.025 in
Camshaft Journal Out-of-Round0.025 mm0.001 in
Camshaft Lobe Lift - Exhaust6.9263 mm0.2727 in
Camshaft Lobe Lift - Intake6.9263 mm0.2727 in
Cooling System
Thermostat Full Open Temperature195 degrees
Connecting Rod
Connecting Rod Bearing Clearance0.018-0.062 mm0.0007-0.0024 in
Connecting Rod Bore Diameter60.322-60.338 mm2.375-2.376 in
Connecting Rod Bore Out-of-Round0.006 mm0.00023 in
Connecting Rod Length - Center to Center150 mm5.9 in
Connecting Rod Side Clearance0.200-0.241 mm0.008-0.009 in
Crankshaft
Connecting Rod Journal Diameter57.122-57.138 mm2.248-2.249 in
Connecting Rod Journal Out-of-Round0.005 mm0.0002 in
Connecting Rod Journal Taper0.005 mm0.0002 in
Connecting Rod Journal Width21.92-22.08 mm0.863-0.869 in
Crankshaft End Play0.060-0.210 mm0.0024-0.0083 in
Crankshaft Main Bearing Clearance - Except #30.019-0.064 mm0.0008-0.0025 in
Crankshaft Main Bearing Clearance - #3 Thrust Bearing0.032-0.077 mm0.0012-0.0030 in
Crankshaft Main Journal Diameter67.240-67.256 mm2.6473-2.6479 in
Crankshaft Main Journal Out-of-Round0.005 mm0.0002 in
Crankshaft Main Journal Taper0.005 mm0.0002 in
Crankshaft Rear Flange Runout0.04 mm0.0016 in
Cylinder Head
Combustion Chamber Depth - at Measurement Point2.2 mm0.087 in
Surface Finish - Maximum2.8 RA
Surface Flatness - Block Deck0.08 mm per 152 mm0.003 in per 6 in
Surface Flatness - Exhaust Manifold Deck0.1 mm0.004 in
Surface Flatness - Intake Manifold Deck0.1 mm0.004 in
Valve Guide Bore - Exhaust8.01 mm0.315 in
Valve Guide Bore - Intake8.01 mm0.315 in
Valve Guide Installed Height16.6 mm0.654 in
Lubrication System
Oil Capacity - with Filter3.8 liter4.0 quarts
Oil Pressure - @ 1850 RPM207-310 kPa30-45 PSI
Oil Pump
Gear Diameter50.749-50.800 mm1.997-1.999 in
Gear Pocket - Depth26.274-26.332 mm1.034-1.036 in
Gear Pocket - Diameter50.902-50.952 mm2.004-2.005 in
Gears Lash0.094-0.195 mm0.0037-0.0077 in
Relief Valve-to-Bore Clearance0.038-0.089 mm0.0015-0.0035 in
Pin
Piston Pin Clearance to Connecting Rod Bore - Press Fit0.004 to -0.021 mm0.0001 to -0.0008 in
Piston Pin Clearance to Piston Pin Bore0.002-0.010 mm0.00008-0.0004 in
Piston Pin Diameter23.952-23.955 mm0.942-0.943 in
Piston Pin Length64.21-64.44 mm2.57-2.53 in
Piston
Piston Diameter - Production98.970-99.008 mm3.896-3.897 in
Piston Diameter - Service Limit98.950 mm3.895 in
Piston Pin Bore Diameter23.957-23.962 mm0.943 in
Piston Ring Groove Width1.22-1.24 mm0.048-0.049 in
Piston to Bore Clearance - Production0.008 to +0.048 mm0.0003 to +0.0018 in
Piston to Bore Clearance - Service Limit - Maximum0.080 mm0.003 in
Piston Ring End Gap
First Compression Ring0.15-0.30 mm0.006-0.011 in
Second Compression Ring0.25-0.45 mm0.009-0.017 in
Oil Control Ring0.15-0.65 mm0.06-0.025 in
Piston Ring to Groove Clearance
First Compression Ring0.03-0.065 mm0.001-0.002 in
Second Compression Ring0.02-0.055 mm0.0007-0.002 in
Oil Control Ring0.01 mm0.0004 in
Piston Ring Thickness
First Compression Ring1.175-1.190 mm0.046-0.047 in
Second Compression Ring1.475-1.490 mm0.058 in
Oil Control Ring - Maximum2.50 mm0.098 in
Valves
Valve Face Angle45 degrees
Valve Seat Angle46 degrees
Valve Seat Depth - Exhaust - From Deck Face8.9-9.1 mm0.350-0.358 in
Valve Seat Depth - Intake - From Deck Face7.9-8.1 mm0.311-0.318 in
Valve Seat Width - Exhaust1.70-2.0 mm0.067-0.079 in
Valve Seat Width - Intake1.55-1.80 mm0.061-0.071 in
Valve Stem-to-Guide Clearance0.024-0.064 mm0.0009-0.0025 in
Valve Lifters/Push Rods
Push Rod Length - Intake147.51 mm5.81 in
Push Rod Length - Exhaust154.87 mm6.10 in
Valve Springs
Valve Spring Free Length52.88 mm2.08 in
Valve Spring Assembly Installed Height46.75 mm1.84 in
Valve Spring Load Check Height45.75 mm1.801 in
Valve Spring Load - Closed - Without Damper340±19 N 43.2 mm76.4 lb 1.701 in
Valve Spring Load - Open - Without Damper1,023±44 N 32 mm230 lb 1.260 in
Valve Spring Total Number of Coils8.01

Adhesives, Fluids, Lubricants, and Sealers

ApplicationType of MaterialGM Part Number
United StatesCanada
Camshaft Rear Bearing Hole PlugSealant1237790110953504
Coolant Drain PlugSealant1234600410953480
Coolant Temperature Sensor ThreadsSealant1234600410953480
Crankshaft Balancer KeywaySealant1237852188901148
Crankshaft Position Sensor Bolt/Stud ThreadsThreadlock1234538210953489
Engine Block Coolant Drain Plug ThreadsSealant1234600410953480
Engine Block Oil Gallery Plug ThreadsSealant1234600410953480
Engine Front Cover Bolt ThreadsSealant1234600410953480
Engine Oil5W-30 SAE Engine Oil12345610993193
Engine Oil5W-30 Dexos1 Engine Oil1929300019386321
Engine Oil Cooler Fitting ThreadsSealant1234600410953480
Engine Oil SupplementLubricant1052367992869
Intake Manifold Bolt Threads - Upper and LowerThreadlock1234538210953489
Intake Manifold Coolant PipeSealant8902129710953488
Intake Manifold to Engine Block Mating SurfaceSealant1237852188901148
Intake Manifold Tuning ValveLubricant1051344993037
Oil Filter Bypass Hole Plug ThreadsSealant1234600410953480
Oil Pan Surface at Front Cover - Block Mating AreaSealant1237852188901148
Oil Pan Surface at Rear Crankshaft Main Bearing CapSealant1237852188901148
Oil Pressure Switch ThreadsSealant1234600410953480
Oil Pan Side BoltsSealant1234600410953480
Oil Pump Suction PipeSealant1234600410953480
Piston and Piston PinEngine Oil12345610993193
Rear Crankshaft Main Bearing CapSealant105294310953491
Throttle Body Stud and BoltsThreadlock1234538210953489
Valve Lifter and Camshaft PrelubeLubricant8886258688862827
Valve Lifter Guide Bolt ThreadsThreadlock1234538210953489
Valve Rocker Arm Cover Notch at Cylinder Head and Lower Intake ManifoldSealant1237852188901148

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