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Cummins M Series engine

Cummins M Series
Overview
Manufacturer Cummins
Also called M11, M11 CELECT Plus, ISM, ISMe
Production 1994-2010 (M11, M11 CELECT, ISM)
1994-present (ISMe)
Combustion chamber
Configuration Straight six diesel engine
Displacement 10.8 litres (659.1 cu in)
Cylinder bore 4.921 inches (125.0 mm)
Piston stroke 5.787 inches (147.0 mm)
Cylinder block alloy

Cast iron

CGI Compact Graphite
Cylinder head alloy Cast iron
Combustion
Turbocharger Holset Variable Geometry Turbocharger (ISM)
Fuel type Diesel
Oil system Wet sump
Cooling system Water cooled
Chronology
Predecessor Cummins L10
Successor ISX11.9

Cast iron

The Cummins M Series engine is a straight six diesel engine designed and produced by Cummins. It displaces 10.8 litres (659.1 cu in). Introduced as the M11 in 1994, it was built on the previous L10 engine (same 4.921 inches (125.0 mm) cylinder bore, but a longer 5.787 inches (147.0 mm) piston stroke compared to the L10's 5.354 inches (136.0 mm) stroke).

Later M11's received the electronic CELECT and CELECT Plus fuel systems consisting of a gear pump and solenoid controlled injectors. The M11 CELECT Plus became the ISM when Cummins applied its Interact System (hence the "IS" in ISM) to the M11 CELECT Plus in 1998 to further improve the engine. The ISM is available in four different configurations, with slightly different emphasis on maximum power (450 horsepower (336 kW; 456 PS) vs. 500 horsepower (373 kW; 507 PS)) and peak torque.



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