Duramax I6 engine

The Duramax I-6 is a diesel engine available in select models of General Motors light duty trucks and SUVs. Applications include the Chevrolet Silverado 1500, Suburban, Tahoe, GMC Sierra 1500, Yukon, Yukon XL and the Cadillac Escalade.

Duramax I-6
Overview
Also calledLM2
Layout
ConfigurationInline 6
Displacement3.0 litres (180 in3)
Cylinder bore84 millimetres (3.3 in)
Piston stroke90 millimetres (3.5 in)
Block materialCast aluminum
Head materialCast aluminum
ValvetrainDOHC
Timing drive systemChains
Compression ratio15.0: 1
Combustion
Fuel systemCommon rail direct fuel injection
ManagementGM D1P-E98
Fuel typeultra-low-sulfur diesel and B20 biodiesel
Output
Power output207 kilowatts (278 hp)
Specific power69 kW/l
Torque output624 newton metres (460 lbf⋅ft)
Dimensions
Length908 millimetres (35.7 in)
Width914 millimetres (36.0 in)
Height903 millimetres (35.6 in)
Dry weight212 kilograms (467 lb)
Emissions
Emissions target standardTier 3 Bin 160

Engine details

  • Displacement: 3.0L
  • Configuration: I-6
  • Horsepower: 277 hp @ 3750 rpm
  • Torque: 460 ft-lb @ 1500 rpm
  • RPO code: LM2
  • Intercooler: liquid-to-air
  • Block: Aluminum
  • Head: Aluminum
  • Crank: Forged Steel
  • Rods: Forged
  • Pistons: Hypereutetic cast aluminum alloy
  • Cylinder liners: Iron

The engine's timing components are located at the rear of the engine, and feature timing chains to drive the camshafts and high pressure fuel pump, and a wet belt to drive the oil pump.[1]

Most of the development and engineering work for the LM2 Duramax, as well as primary calibration took place in Turin, Italy.[2][3] The engine is being produced at the GM Flint Engine Plant in Flint, Michigan, USA.[4] Multiple testing has shown 40 MPG is possible when hypermiling.[5]

References

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