From 1980 to 1986, the company produced the 2.3-liter Mitsubishi 4D55 diesel engine, which was used in Pajero SUVs, L200 pickups, and Galant passenger cars. The cylinder head of this power unit is known to have a number of issues.
The 4D56 engine is another member of the 4D5 family.
The engine was mounted on:
- Mitsubishi Delica in 1982 – 1986;
- Mitsubishi Galant in 1980 – 1983;
- Mitsubishi L200 in 1982 – 1986;
- Mitsubishi Pajero in 1982 – 1986.
Specifications
| Production years | 1980-1986 |
| Displacement, cc | 2346 |
| Fuel system | prechamber |
| Power output, hp | 65 – 75 (4D55 Non-Turbo) 80 (4D55T Non-Wastegated Turbo) 84 – 95 (4D55T Wastegated Turbo) |
| Torque output, Nm | 137 – 147 (4D55 Non-Turbo) 169 (4D55T Non-Wastegated Turbo) 175 – 182 (4D55T Wastegated Turbo) |
| Cylinder block | cast iron R4 |
| Block head | aluminum 8v |
| Cylinder bore, mm | 91.1 |
| Piston stroke, mm | 90 |
| Compression ratio | 21 |
| Features | no |
| Hydraulic lifters | no |
| Timing drive | belt |
| Phase regulator | no |
| Turbocharging | no (4D55 Non-Turbo) MHI TC05 (4D55T Non-Wastegated Turbo) MHI TD04 (4D55T Wastegated Turbo) |
| Recommended engine oil | 5W-40 |
| Engine oil capacity, liter | 5.4 |
| Fuel type | diesel |
| Euro standards | EURO 1 (4D55 Non-Turbo) EURO 2 (4D55T Non-Wastegated Turbo) EURO 2 (4D55T Wastegated Turbo) |
| Fuel consumption, L/100 km (for Mitsubishi Pajero 1984) — city — highway — combined |
12.5 8.8 10.3 |
| Engine lifespan, km | ~275 000 |
| Weight, kg | 183 |
Disadvantages of the Mitsubishi 4D55 engine
Even at low runs, the cylinder head cracked in the prechamber area of engines until 1982;
Although the cylinder head lasted longer after 1982, the issue persisted;
Owners most frequently complain about frequent oil leaks from gaskets and seals; strong engine smoke from injector nozzle wear comes in second; keep an eye on the timing belt’s condition because if it breaks, it will at least break the rocker.