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HOMESERVICE MANUALSOLDSMOBILE2004BRAVADA RWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1335 (ENGINE MECHANICAL - 3.1L UNIT REPAIR)SPECIFICATIONSENGINE MECHANICAL SPECIFICATIONS
2004 Oldsmobile Bravada RWD

Engine Mechanical Specifications

2004 Oldsmobile Bravada RWDSECTION Engine Mechanical Specifications
WARNING: This page is about a different car, the 2002 Pontiac Grand Prix. 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° V-6
  Displacement 3.1L 191 cu in
  RPO - VIN Code LG8 - J
  Bore 89 mm 3.50 in
  Stroke 84 mm 3.31 in
  Compression Ratio 9.6:1
  Firing Order 1-2-3-4-5-6
  Oil Pressure 103 kPa 15 psi @ 1100 RPM
Cylinder Bore
  Diameter 89.016-89.034 mm 3.5046-3.5053 in
  Out Of Round Maximum 0.014 mm 0.0005 in
  Taper - Thrust Side Maximum 0.020 mm 0.0008 in
Piston
  Diameter-Gaged on the skirt 12 mm (0.47 in) below the centerline of the piston pin bore 88.981-89.009 mm 3.5029-3.5040 in
  Clearance 0.07-0.053 mm 0.0013-0.0027 in
  Pin Bore 23.006-23.013 mm 0.9057-0.9060 in
Piston Ring
  Top Groove Side Clearance 0.04-0.086 mm 0.002-0.0033 in
  Second Groove Side Clearance 0.04-0.09 mm 0.002-0.0035 in
  Top Ring Gap 0.15-0.36 mm 0.006-0.014 in
  Second Ring Gap 0.5-0.71 mm 0.0197-0.0280 in
  Oil Ring Groove Clearance 0.046-0.201 mm 0.008 in
  Gap with segment at 89.0 mm (3.50 in) 0.25-1.27 mm 0.0098-0.05 in
Piston Pin
  Diameter 22.9915-22.9964 mm 0.9052-0.9054 in
  Clearance In Piston 0.0096-0.0215 mm 0.0004-0.0008 in
  Fit in Rod (-0.0469)-(0.017) mm (press fit) 0.0006-0.0018 in
Crankshaft
  Main Journal Diameter 67.239-67.257 mm 2.6473-2.6483 in
  Main Journal Taper 0.005 mm 0.0002 in
  Out Of Round 0.005 mm 0.0002 in
  Flange Runout-Max 0.04 mm 0.0016 in
  Cylinder Block Main Bearing Bore Diameter 72.155-72.168 mm 2.8407-2.8412 in
  Crankshaft Main Bearing Inside Diameter 67.289-67.316 mm 2.6492-2.6502 in
  Main Bearing Clearance - except number 3 0.019-0.064 mm 0.0008-0.0025 in
  Main Thrust Bearing Clearance - number 3 0.032-0.077 mm 0.0012-0.0030 in
  Crankshaft End Play 0.060-0.210 mm 0.0024-0.0083 in
  Crankshaft Flange Runout-Max 0.04 mm 0.0016 in
Connecting Rod
  Connecting Rod Bearing Journal Diameter 50.768-50.784 mm 1.9987-1.9994 in
  Connecting Rod Bearing Journal Taper 0.005 mm 0.0002 in
  Connecting Rod Bearing Journal Out Of Round 0.005 mm 0.0002 in
  Connecting Rod Bearing Bore Diameter 53.962-53.984 mm 2.124-2.125 in
  Connecting Rod Inside Bearing Diameter 50.812-50.850 mm 2.000-2.002 in
  Connecting Rod Bearing Journal Clearance 0.018-0.062 mm 0.0007-0.0024 in
  Connecting Rod Side Clearance 0.18-0.44 mm 0.007-0.017 in
Camshaft
  Lobe Lift - Intake and Exhaust 6.9263 mm 0.2727 in
  Journal Diameter 47.45-47.48 mm 1.868-1.869 in
  Camshaft Bearing Bore Diameter-Front and Rear 51.03-51.08 mm 2.009-2.011 in
  Camshaft Bearing Bore Diameter-Middle #2 and #3 50.77-50.82 mm 1.999-2.001 in
  Camshaft Bearing Inside Diameter 47.523-47.549 mm 1.871-1.872 in
  Journal Clearance 0.026-0.101 mm 0.001-0.0039 in
  Journal Runout-Max 0.025 mm 0.001 in
Valve System
  Roller Lift Hydraulic
  Rocker Arm Ratio 1.60:1
  Valve Face Angle 45°
  Seat Angle 46°
  Valve Seat Runout 0.025 mm 0.001 in
  Seat Width-Intake 1.55-1.80 mm 0.061-0.071 in
  Seat Width-Exhaust 1.70-2.0 mm 0.067-0.079 in
  Valve Margin - Minimum Intake 2.10 mm 0.083 in
  Valve Margin - Minimum Exhaust 2.70 mm 0.106 in
  Valve Stem Clearance 0.026-0.068 mm 0.0010-0.0027 in
Valve Spring
  Valve Springs Free Length 48.5 mm 1.89 in
  Valve Springs Load - Closed 320 N @ 43.2 mm 75 lb @ 1.701 in
  Valve Springs Load - Open 1036 N @ 32 mm 230 lb @ 1.260 in
  Installed Height Intake-Exhaust 43.2 mm 1.701 in
  Approx. # or coils 6.55
Oil Pump
  Gear Lash 0.094-0.195 mm 0.0037-0.0077 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
Oil Pump Gear
  Length 30.45-30.48 mm 1.199-1.200 in
  Diameter 38.05-38.10 mm 1.498-1.500 in
  Side Clearance 0.038-0.088 mm 0.001-0.003 in
  End Clearance 0.040-0.125 mm 0.002-0.005 in
  Valve to Bore Clearance 0.038-0.089 mm 0.0015-0.0035 in
RENDER: 1.0x

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  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.