Engine Mitsubishi 4D55

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.

The 4D5 family also includes engines: 4D56.

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.

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

  • 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.

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