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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