Engine Mitsubishi 4G37

The 1.8-liter Mitsubishi 4G37 engine was produced by the Japanese concern from 1983 to 1994 and was installed on such popular company models as the Lancer, Galant or Eclipse. This power unit was offered in both carburetor and ECI-MULTI injection versions.

The 4G3 family also includes engines: 4G32 and 4G33.

The engine was installed on:

  • Mitsubishi Eclipse 1G in 1989 – 1994;
  • Mitsubishi Galant E10 in 1983 – 1989;
  • Mitsubishi Galant E30 in 1987 – 1993;
  • Mitsubishi Lancer CV in 1987 – 1990;
  • Mitsubishi Lancer CA in 1988 – 1992;
  • Mitsubishi Space Wagon in 1983 – 1991.

Specifications

Production years 1983-1994
Displacement, cc 1755
Fuel system carburetor (4G37 carburetor)
injector (4G37B ECI-multi)
Power output, hp 86 (4G37 carburetor)
90 – 97 (4G37B ECI-multi)
Torque output, Nm 137 (4G37 carburetor)
138 – 144 (4G37B ECI-multi)
Cylinder block cast iron R4
Block head aluminum 8v
Cylinder bore, mm 80.6
Piston stroke, mm 86
Compression ratio 9.0 (4G37 carburetor)
9.5 (4G37B ECI-multi)
Features no
Hydraulic lifters no
Timing drive belt
Phase regulator no
Turbocharging no
Recommended engine oil 5W-40
Engine oil capacity, liter 3.9
Fuel type 92
Euro standards EURO 0 (4G37 carburetor)
EURO 1/2 (4G37B ECI-multi)
Fuel consumption, L/100 km (for Mitsubishi Galant 1990)
— city
— highway
— combined
10.3
6.1
7.9
Engine lifespan, km ~350 000
Weight, kg 135

Disadvantages of the Mitsubishi 4G37 engine

  • Short-lived belts cause the most problems: timing belt and balancer shaft belt;
  • Oil seals often ooze oil, which gets on the belts and reduces their life;
  • In second place are the failures of the electronic control unit and the ignition system;
  • The reason for the floating engine speed at idle is the contamination of the idle speed controller or throttle;
  • Valve clearances require frequent adjustment, power unit supports do not last long.

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