Mitsubishi 4D56 Engine Service manual Download

The Mitsubishi 4D56 diesel engine
The history of the much famed power plant manufactured by Mitsubishi can be traced back to 1972 with the introduction of the 4G5 as a collaboration between Aston and Mitsubishi. However in 1980, the 4 cylinder, belt driven overhead camp shaft diesel power-plant was introduced by Mitsubishi and is the much famed workhorse the "4D56". The production of this engine which began in 1980's is still continuing to this date with only minor variations while the most significant being the introduction of the common rail fuel injection system.
Mitsubishi engines are known for its power and the longevity of the 4D56 is due to many reasons, cost effectiveness in maintaining, reliability, power and a fairly easy engine to maintain. 
In Sri Lanka, where we have our set of wheels, the 4D56 is a workhorse, known by any mechanic around the country. So the chances of getting into a fix is fairly remote since the mechanics have decades of experience in maintaining these engines. 
How come Mitsubishi is still manufacturing this engine without discontinuing it like the other manufactures. The answer is simple. If it serves the purpose and can keep upto any new engine why change. Yes, it delivers good power (in comparison to any stock vehicle), cheap to maintain, reliable and if serviced properly with the fuel pump and injectors in good condition would provide a running economy of approx. 12-14 km per liter of diesel. 
However in the mid 90's Mitsubishi introduced a much powerful 4M4 engine which it fixed to its Pajero's, Montero's etc., though continuing to still fix the 4D56 to its UTE's citing reliability.
Mitsubishi 4D56 engine
Displacement - 2.5 L (2,476 cc)
Bore - 91.1 mm
Stroke - 95.0 mm
Fuel type - Diesel
Non-Turbo
Power - 55 kW (74 hp) at 4,200 rpm
Torque - 142 N�m (105 lb�ft) at 2,500 rpm
Engine type - Inline 4-cylinder SOHC
Fuel system - Distribution type jet pump
Compression ratio - 21:1
Non-intercooled Turbo
Power - 84 PS (62 kW) at 4,200 rpm[10]
Torque - 201 N�m (148 lb�ft) at 2,000 rpm
Engine type - Inline 4-cylinder SOHC
Non-intercooled Turbo (TD04 Turbo)
Power - 90 hp (67 kW) at 4,200 rpm
Torque - 197 N�m (145 lb�ft) at 2,000 rpm
Engine type - Inline 4-cylinder SOHC
Fuel system - Distribution type jet pump
Compression ratio - 21:1
Intercooled Turbo (TD04 watercooled Turbo)
Power - 78 kW (104 hp) at 4,300 rpm
Torque - 240 N�m (177 lb�ft) at 2,000 rpm
Engine type - Inline 4-cylinder SOHC
Rocker arm - Roller Follower type[12]
Fuel system - Distribution type jet pump (indirect injection)
Combustion chamber - Swirl type
Bore x Stroke - 91.1 x 95mm
Compression ratio - 21:1
Lubrication System - Pressure feed, full flow filtration
Intercooled Turbo (1st Generation DI-D)
Power - 85 kW (114 hp) at 4,000 rpm
Torque - 247 N�m (182 lb�ft) at 2,000 rpm
Engine type - Inline 4-cylinder
Fuel system - 1st Generation Common Rail Direct Injection (CRDi)
Compression ratio - 17:1
Intercooled Turbo (2nd Generation DI-D)
Power - 100 kW (134 hp) at 4,000 rpm
Torque - 320 N�m (236 lb�ft) at 2,000 rpm
Engine type - Inline 4-cylinder
Fuel system - 2nd Generation Common Rail Direct Injection (CRDi)
Compression ratio - 17:1
Intercooled Turbo (3rd Generation DI-D with variable geometry turbo)
With manual transmission
Power - 131 kW (178 PS) at 4,000 rpm
Torque - 400 N�m (295 lb�ft) at 2,000 rpm
Engine type - Inline 4-cylinder
Fuel system - 2nd Generation Common Rail Direct Injection (CRDi)
Compression ratio - 16.5:1
With automatic transmission
Power - 131 kW (178 PS) at 4,000 rpm
Torque - 350 N�m (258 lb�ft) at 1,800 rpm
Engine type - Inline 4-cylinder
Fuel system - 2nd Generation Common Rail Direct Injection (CRDi)
Compression ratio - 16.5:1
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