The Cummins M11 is a straight six, water-cooled, turbocharged diesel engine originally manufactured in 1994 and painted red at the factory. Both the cylinder block and the cylinder head are of cast iron alloy. The M11 diesel features a wet sump oil system and its primary application is as a heavy-duty diesel engine. You will find the Cummins M11 engines for sale in large transit buses (40′ and larger) and large fire trucks, as well as anyplace a heavy-duty diesel engine is required. Electronic controls were added in 1996 and improved the efficiency of the M11 and caused the model to be renamed the M11 Plus.
Oil Pressure – 10psi at idle Bore – 125.0 mm/4.921 in Stroke – 147 mm/5.787 in Displacement – 10.8 L/659.1 cu. in Intake Valve Clearance – 0.25 mm/.010″ Exhaust Valve Clearance – 0.51 mm/.02″ Firing Order 1-5-3-6-2-4 Advertised hp – 280 to 500 Peak Torque 1150-1550 lb-ft @ 1200 rpm Governed speed – 2100 Engine Brake Piston Clearance – 0.38 mm/.015″ through 2006; 0.69 mm/.027″ 2007 and newer Turbocharger-Holset Variable Geometry
Oil, fuel and coolant filters are to be changed every 15,000 miles, 500 hours or 6 months. The particulate filter on models 2007 and later need to be cleaned at 240,000 miles, 6000 hours or 3 years. Valves need to be adjusted at 120,000 miles, 3000 hours or 2 years.
Cummins added the Interact System to the M11 Plus and renamed this engine once again. The new name became the ISM and four power options were available, ranging from 450 hp to 500 hp. The ISM initially had the CM570 fuel system but upgraded to the CM875 in 2002, and upgraded to the CM875 fuel system in 2007. The Interact System integrates electronics into the engine so that the engine, brakes, transmission and accessories deliver optimum performance and fuel economy.
Clessie Cummins, a chauffeur by trade, founded Cummins Engines in 1919 by building three diesel engines for Sears Roebuck & Co. He continued making the same engines until 1952 when the turbocharger was introduced, giving his engines a 50% increase in horsepower. Cummins primary focus remains the on-highway market, although some engines for off-highway vehicles are produced. To keep up with emissions regulations, the EGR (exhaust gas recirculation) system became standard on all engines.
Cummins has been providing diesel engines to the industry for almost a hundred years. Their diesels are hardworking, dependable and efficient. Check out one for yourself at www.GotEngines.com!