DI-D engines: operating characteristics

DI-D engines: operating characteristics

DI-D engines are diesel turbocharged engines equipped with a direct fuel injection system. They are installed in Mitsubishi cars. They were first featured on the third generation Mitsubishi Pajero SUVs in 1999. Nowadays, these engines are widely used.

Features of DI-D engines

DI-D engines have the inline-four arrangement. They have a cast iron or aluminium engine block. The cylinder head is always made from aluminium. Depending on the version, a chain or a belt is used in the valve timing mechanism. A distributor type pump was used for fuel injection on engines produced in the early 2000s. Later it was replaced by the more efficient and fuel-saving Common Rail system.

Popular DI-D engines

Engine code Engine capacity, l Number of valves Max. output, hp Max. torque, N⋅m Production start Mitsubishi models equipped with this type of engine
4D56 2.5 8 114 247 2004 L200 IV; Pajero Sport II
16 136 320
16 178 350–400
4М41 3.2 16 165 351 1999 Pajero II, III, IV; L200 IV
16 175–200 382–441
4N13 1.8 16 150 300 2010 Lancer VIII; ASX
4N14 2.2 16 150–177 360–380 2010 ASX; Outlander II and III; Delica D5
4N15 2.4 16 154–181 380–430 2015 Pajero Sport II; L200 V
F9Q 1.9 8 80–120 180–270 2000 Carisma DA2A, DAO; Space Star DG_A
8 110–130 260–300 2005
8 130 300 2008

Common malfunctions of DI-D engines

Malfunctions  Engines
The engine seals and gaskets often lose their tightness. 4D56
The fuel injectors get broken fast, especially if poor-quality fuel is used. 4D56; 4N15; 4N14
The crankshaft pulley has a short lifespan. 4D56
The balance shaft belt breaks down early. 4D56
The cylinder head often cracks at a relatively low mileage. 4D56
The pistons get damaged due to excessively high temperature. 4М41
The high-pressure fuel pump has a short lifespan. 4М41
The crankshaft pulley is prone to premature wear. 4М41
The EGR valve builds up carbon deposits quickly. 4М41; 4N15; 4N14
The intake manifold flaps get jammed due to formation of carbon deposits. 4N14; 4N15
The crankshaft bearings may spin at a relatively low mileage due to the oil pump wearing out and reduction of pressure in the lubrication system. F9Q
The low-pressure fuel pump breaks down rather often. F9Q
Clogging of the fuel pressure control valve leads to engine malfunctions. F9Q

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