The Mitsubishi 4G32 engine is one of the Japanese automaker’s most iconic motors, having been produced since the late 1960s. The 1.6 liter motor has been the basis for many Mitsubishi models, including the famous Galant, Lancer, as well as cars from other manufacturers such as Hyundai. Its simple design and good maintainability have made it a popular choice for passenger cars and small commercial vehicles.
Mitsubishi 4G32 engine specifications
| Characteristics | 4G32 carburetor 8v | 4G32T Turbo 8v | 4G32B ECI-multi 8v |
|---|---|---|---|
| Precise displacement | 1597 cm³ | 1597 cm³ | 1597 cm³ |
| Power System | Carburetor | Carburetor | Injector |
| Power | 65 – 85 hp | 120 hp | 80 – 90 hp |
| Torque | 115 – 135 Nm | 172 Nm | 125 – 140 Nm |
| Cylinder block | Cast-iron R4 | Cast iron R4 | Cast iron R4 |
| Block head | Aluminum 8v | Aluminum 8v | Aluminum 8v |
| Cylinder diameter | 76.9 mm | 76.9 mm | 76.9 mm |
| Piston stroke | 86 mm | 86 mm | 86 mm |
| Compression ratio | 8.5 to 9.0 | 7.6 | 9.0 – 9.5 |
| Transmission timing | Belt | Belt | Belt |
| Turbocharger | No | Yes | No |
| What oil to use | 3.5 liters 5W-40 | 3.5 liter 5W-40 | 3.5 liters 5W-40 |
| Environmental class | EURO 0 | EBRO 0 | EURO 1/2 |
| Example service life | 300,000 km | 200,000 km | 300,000 km |
| Engine weight | 130 kg | 130 kg | 130 kg |
The 4G32 engine features a simple design that made it one of the most maintainable engines of its time. The cast iron cylinder block provides high strength and durability, while the aluminum block head helps reduce weight and improve cooling.
Engine Modifications
- 4G32 carburetor 8v is the basic version with a carbureted power system. Power output ranges from 65 to 85 hp depending on the settings. It was one of Mitsubishi’s first mass-produced engines and was fitted to many models.
- 4G32T Turbo 8v – turbocharged version with up to 120 hp, which significantly increased performance over the atmospheric version.
- 4G32B ECI-multi 8v – injected version with improved performance and complying with more modern environmental standards. Engine power ranges from 80 to 90 hp.
Cars with engine
| Vehicle model | Period of production |
|---|---|
| Mitsubishi Galant A50 | 1969 – 1973 |
| Galant A110 | 1973 – 1977 |
| Galant A120 | 1976 – 1980 |
| Galant A160 | 1980 – 1984 |
| Galant E10 | 1983 – 1989 |
| Galant E30 | 1987 – 1993 |
| Lancer A70 | 1973 – 1976 |
| Lancer A140 | 1976 – 1979 |
| Lancer A170 | 1979 – 1983 |
| Lancer CV | 1983 – 1988 |
| Lancer CA | 1988 – 1992 |
| Celeste | 1975 – 1982 |
| Cordia | 1982 – 1990 |
| Tredia | 1982 – 1990 |
| Sapporo A120 | 1975 – 1980 |
| Sapporo A160 | 1980 – 1983 |
| Hyundai Pony | 1975 – 1990 |
| Hyundai Stellar | 1983 – 1987 |
The Mitsubishi 4G32 engine has been fitted to a large number of models including the popular Mitsubishi Galant, Lancer as well as cars such as the Hyundai Pony and Hyundai Stellar. This demonstrates the versatility and wide distribution of the engine.
Disadvantages and problems of the Mitsubishi 4G32 engine
Despite its simplicity and reliability, the 4G32 engine had its weaknesses:
- Carburetor problems. Many versions of this engine are equipped with a carburetor, which often became a source of malfunction due to the need for frequent adjustment and cleaning.
- Low timing belt life. Timing and balance shaft belts require frequent replacement due to their relatively low life.
- Oil leaks. Gaskets and oil seals tend to wear out, resulting in oil leaks, especially on timing belts.
- Short life of engine mounts and fuel pump. These components often require replacement before other elements.
- Lack of hydrocompensators. This means the need to adjust the valves every 50,000 km.
Repairability and operation
The 4G32 engine is easy to repair, making it a popular choice among both specialists and motorists who want to do their own maintenance on their car. Typical repairs include replacing gaskets, oil caps and valves.
Some works, such as cylinder block overhaul, boring and grinding, require specialized equipment and it is better to entrust them to professionals.
Oil for the 4G32 engine
For the 4G32 engine it is recommended to use oil labeled 5W-40 or 15W-40. Depending on the operating conditions and mileage of the car, mineral oil for high-mileage cars or synthetic oil to improve performance at extreme temperatures may be recommended.
Can the Mitsubishi 4G32 engine be considered reliable?
The Mitsubishi 4G32 engine has been the basis for many successful car models due to its reliability, ease of maintenance and durability. Despite its shortcomings related to the carburetor system and timing belts, this engine has proven to be a reliable powertrain for long term operation.