LEMON Manuals: Even more car manuals for everyone
Home >> Buick >> 2007 >> Lucerne CX >> Repair and Diagnosis >> External Pages >> Different car >> Section 237 (Engine Mechanical - 3.9L) >> Specifications >> Engine Mechanical Specifications

Engine Mechanical Specifications

WARNING: This page is about a different car, the 2006 Pontiac Montana SV6, 2006 Chevrolet Uplander, and 2006 Buick Terraza. However, it is still accessible from the selected car via links, so may be relevant.
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
  • Capacity
 12.4 liters 13.1 quarts
  • Thermostat Full Open Temperature
 195 degrees
Connecting Rod
  • Connecting Rod Bearing Clearance
 0.18-0.062 mm 0.0007-0.017 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 Journal Width
 23.9-24.1 mm 0.941-0.949 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 Diameter
 67.239-67.257 mm 2.6473-2.6483 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 Filter
 3.8 liter 4.0 quarts
  • Oil Capacity - without Filter
 3.3 liter 3.5 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 - Depth
 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
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
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
 -0.008-0.048 mm -0.0003-0.0018 in
  • Piston to Bore Clearance - service limit - Maximum
 0.080 mm 0.003 in
Pin
  • Piston Pin Clearance to Connecting Rod Bore - Press Fit
 -0.004--0.021 mm -0.0001--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
Valves
  • Valve Face Angle
 45 degrees
  • Valve Seat Angle
 46 degrees
  • Valve Seat Depth - Intake - from deck face
 7.9-8.1 mm 0.311-0.318 in
  • Valve Seat Depth - Exhaust - from deck face
 8.9-9.1 mm 0.350-0.358 in
  • Valve Seat Width - Intake
 1.55-1.80 mm 0.061-0.071 in
  • Valve Seat Width - Exhaust
 1.70-2.0 mm 0.067-0.079 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
scientia non olet · About LEMON Manuals