The 2.3-liter Mitsubishi 4D55 diesel engine was produced by the concern from 1980 to 1986 and was installed on both Galant passenger cars and Pajero SUVs, L200 pickups. This power unit is known for numerous problems with the cylinder head.
4D5 family: 4D55, 4D56.
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 |
The engine was installed on:
- Mitsubishi Delica in 1982 – 1986;
- Mitsubishi Galant in 1980 – 1983;
- Mitsubishi L200 in 1982 – 1986;
- Mitsubishi Pajero in 1982 – 1986.
Disadvantages of the Mitsubishi 4D55 engine
- In engines until 1982, the cylinder head cracked in the prechamber area even at low runs;
- After 1982, the cylinder head lasted longer, but the problem remained;
- Most of all, owners complain about frequent oil leaks from gaskets and seals;
- In second place is strong engine smoke due to wear of the injector nozzles;
- Monitor the condition of the timing belt, if it breaks, it will at least break the rocker.
Frequently asked questions about the Mitsubishi 4D55
How much power does the Mitsubishi 4D55 make?
Power output of the Mitsubishi 4D55, hp: 65 - 75 (4D55 Non-Turbo); 80 (4D55T Non-Wastegated Turbo); 84 - 95 (4D55T Wastegated Turbo). Torque, Nm: 137 - 147 (4D55 Non-Turbo); 169 (4D55T Non-Wastegated Turbo); 175 - 182 (4D55T Wastegated Turbo).
How much oil does the Mitsubishi 4D55 take and which one?
Engine oil capacity: 5.4 liters. Recommended oil: 5W-40.
Does the Mitsubishi 4D55 have a timing belt or chain?
The Mitsubishi 4D55 uses a timing belt.
Is the Mitsubishi 4D55 turbocharged?
Yes, the Mitsubishi 4D55 is turbocharged (no (4D55 Non-Turbo); MHI TC05 (4D55T Non-Wastegated Turbo); MHI TD04 (4D55T Wastegated Turbo)).
Does the Mitsubishi 4D55 need valve clearance adjustment?
Yes, there are no hydraulic lifters, so the valve clearances have to be checked and adjusted periodically.
How long does the Mitsubishi 4D55 last?
The typical lifespan of the Mitsubishi 4D55 is ~275 000 km with proper maintenance.
What is the fuel consumption of the Mitsubishi 4D55?
Mitsubishi Pajero 1984: city 12.5, highway 8.8, combined 10.3 L/100 km.
What cars was the Mitsubishi 4D55 installed on?
Mitsubishi Delica in 1982 - 1986; Mitsubishi Galant in 1980 - 1983; Mitsubishi L200 in 1982 - 1986; Mitsubishi Pajero in 1982 - 1986.
What are the common problems of the Mitsubishi 4D55?
In engines until 1982, the cylinder head cracked in the prechamber area even at low runs. After 1982, the cylinder head lasted longer, but the problem remained. All known problems.
What engines are related to the Mitsubishi 4D55?
4D5 family: 4D56.
