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Engine Mechanical Specifications

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Application Specification
Metric English
General Data
  • RPO
 LM2
  • Engine Type
 6-Cylinder Inline
  • Displacement
 3.0 L 183 cu in
  • VIN
 T
  • Bore
 84.0 mm 3.307 in
  • Stroke
 90.0 mm 3.543 in
  • Compression Ratio
 15: 1
  • Compression
 1800 kPa (261 PSI)
  • Firing Order
 1 - 5 - 3 - 6 - 2 - 4
  • Glow Plug Voltage
 5.4 V
Cylinder Head
  • Deck Surface Flatness at the complete length
 0.10 mm 0.004 in
  • Deck Surface Flatness at a length of 150x150 mm (5.9055x5.9055 in)
 0.05 mm 0.0019 in
  • Intake/Exhaust Valve Guide Internal Diameter
 5.00 - 5.02 mm 0.197 - 0.198 in
Lubrication System
  • Oil Pressure @ 1000 rpm 19 - 126°C (66 - 259°F)
 152 - 218 kPa 22 - 32 psi
  • Oil Pressure @ 2500 rpm 19 - 126°C (66 - 259°F)
 177 - 280 kPa 26 - 41 psi
  • Oil Pressure @ 4000 rpm 19 - 126°C (66 - 259°F)
 320 - 400 kPa 46 - 58 psi
Valves
  • Valve Stem Diameter - Exhaust
 4.955 - 4.975 mm 0.195 - 0.196 in
  • Valve Stem Diameter - Intake
 4.965 - 4.985 mm 0.195 - 0.196 in
  • Valve Face Diameter - Intake
 28.09 - 28.35 mm 1.106 - 1.116 in
  • Valve Face Diameter - Exhaust
 24.29 - 24.55 mm 0.956 - 0.967 in
  • Valve Length - Intake/Exhaust
 95.17 - 95.43 mm 3.747 - 3.757 in
  • Intake and Exhaust Valve Seat Angle
 46.0 degrees ± 0.25 degrees
  • Valve Spring - Free Length
 41.64 mm 1.639 in
  • Valve Spring Load @ 31.8 mm (1.252 in)
 240 N 54 lbf
  • Valve Spring Load @ 23.8 mm (0.937 in)
 450 N 101 lbf
Engine Block
  • Engine Block Height
 295 mm 11.614 in
  • Connecting Rod Length
 140 mm 5.512 in
  • Compression Height/Piston Protrusion
    
  • Deck Surface Flatness at a length of 150 mm (3.94 in)
 0.05 mm 0.001 in
  • Cylinder Bore - Primary Target @ 42 mm (1.65 in) below deck surface
 83.992 - 84.008 mm 3.3068 - 3.3074 in
  • Cylinder Bore @ 10 mm (0.39 in) below deck surface
 83.987 - 84.013 mm 3.3066 - 3.3076 in
  • Cylinder Bore @ 140 mm (5.51 in) below deck surface
 83.987 - 84.013 mm 3.3066 - 3.3076 in
Connecting Rod
  • Connecting Rod Bushing Internal Diameter
 30.02 - 30.03 mm 1.1819 - 1.1822 in
  • Connecting Rod Big End Bore Diameter
 54.992 - 55.008 mm 2.165 - 2.1656 in
Crankshaft
  • Axial Clearance
 0.05 - 0.65 mm 0.0019 - 0.0256 in
  • Axial Thrust Bearing - Standard Size
 2.425 - 2.475 mm 0.0955 - 0.0974 in
  • Main Bearing Clearance
 0.026 - 0.045 mm 0.001 - 0.0017 in
  • Bearing Bore Diameter in Cylinder Block
 62.993 - 63.007 mm 2.48 - 2.481 in
  • Main Bearing Diameter - Standard Size
 57.992 - 58.008 mm 2.2831 - 2.2838 in
  • Main Bearing Thickness - Class A - 1 Line Marking
 2.473 - 2.479 mm 0.0974 - 0.0976 in
  • Main Bearing Thickness - Class B - 2 Line Marking
 2.479 - 2.485 mm 0.0976 - 0.0978 in
  • Main Bearing Thickness - Class C - 3 Line Marking
 2.485 - 2.491 mm 0.0978 - 0.0981 in
  • Crankshaft Journal Width for Thrust Bearing - Standard Size
 30.3 - 30.9 mm 1.1929 - 1.2165 in
  • Crank Pin Bearing Clearance
 0.014 - 0.062 mm 0.0006 - 0.0024 in
  • Crank Pin Diameter
 51.992 - 52.008 mm 2.0469 - 2.0476 in
  • Upper Crank Pin Bearing Thickness - Standard Size
 1.477 - 1.487 mm 0.0581 - 0.0585 in
  • Lower Crank Pin Bearing Thickness - Standard Size
 1.477 - 1.483 mm 0.0581 - 0.0584 in
Piston Ring
  • Piston Ring Closed Gap
  • First Compression Ring
 0.25 - 0.035 mm 0.0079 - 0.0138 in
  • Second Compression Ring
 1.3 - 1.5 mm 0.0512 - 0.0591 in
  • Oil Control Ring
 0.25 - 0.50 mm 0.0098 - 0.0197 in
  • Piston Ring to Groove/Axial Clearance
  • First Compression Ring
 0.13 - 0.17 mm 0.0051 - 0.0067 in
  • Second Compression Ring
 0.055 - 0.10 mm 0.0022 - 0.0039 in
  • Oil Control Ring
 0.025 - 0.065 mm 0.0010 - 0.0026 in
  • Piston Ring Thickness
  • First Compression Ring
 1.470 - 1.490 mm 0.0579 - 0.0587 in
  • Second Compression Ring
 1.470 - 1.495 mm 0.0579 - 0.0589 in
  • Oil Control Ring
 1.970 - 1.990 mm 0.0776 - 0.0784 in
Piston
  • Piston Diameter
  • Measured 13 mm (0.512 in) from lower piston skirt area and perpendicular to the piston pin axis
 83.933 - 83.947 mm 3.3044 - 3.3050 in
  • Measured 38 mm (1.496 in) from lower piston skirt area and perpendicular to the piston pin axis
 83.831 - 83.849 mm 3.3004 - 3.3011 in
  • Measured 68.2 mm (2.685 in) from lower piston skirt area and perpendicular to the piston pin axis
 83.193 - 83.217 mm 3.2753 - 3.2763 in
  • Piston Overlap
 0.43 - 0.78 mm 0.0169 - 0.0307 in
  • Piston Ring Groove Width - First Compression Ring
 1.62 - 1.64 mm 0.0638 - 0.0646 in
  • Piston Ring Groove Width - Second Compression Ring
 1.55 - 1.57 mm 0.0610 - 0.0618 in
  • Piston Ring Groove Width - Oil Control Ring
 2.015 - 2.035 mm 0.0793 - 0.0801 in
  • Piston Pin
  • Piston Pin Diameter
 29.995 - 30.000 mm 1.1809 - 1.1811 in
  • Piston Pin Eye Diameter
 30.013 - 30.018 mm 1.1816 - 1.1818 in
  • Clearance Piston Pin in Piston
 0.013 - 0.023 mm 0.0005 - 0.0009 in
  • Clearance Piston Pin in Con Rod
 0.020 - 0.035 mm 0.0008 - 0.0013 in
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