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 | petrol |
| 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.
