The Mitsubishi 4G32 engine is a four-cylinder, overhead valve (OHV) engine that was produced by Mitsubishi Motors from 1970 to 1980. It was used in a variety of vehicles, including the Mitsubishi Galant, Dodge Colt, and Plymouth Cricket.
The 4G32 engine was first introduced in 1970 as a replacement for the Mitsubishi 4G30 engine. It had a displacement of 1.6 liters and produced around 80 horsepower. Over the years, Mitsubishi made a few revisions to the engine, which resulted in improved performance and reliability.
In 1971, Mitsubishi introduced a performance version of the 4G32 engine, known as the 4G32B. This engine had a higher compression ratio, a larger carburetor, and a more aggressive camshaft, which resulted in an increase in horsepower to around 100.
Engine specifications for Mitsubishi 4G32 1.6 l
Modification: 4G32 carburetor 8v
| Displacement | 1597 cc |
| Power system | Carburetor |
| Engine power | 65 – 85 hp |
| Torque | 115 – 135 Nm |
| Cylinder block | Cast iron R4 |
| Cylinder head | Aluminum 8v |
| Cylinder diameter | 76.9 mm |
| Stroke | 86 mm |
| Compression ratio | 8.5 – 9.0 |
| Engine features | No |
| Hydraulic compensators | No |
| Timing Chain/Belt | Belt |
| Variable Valve Timing (VVT) | No |
| Turbocharger | No |
| Oil capacity/Recommended oil | 3.5 l 5W-40 |
| Fuel type | Regular |
| Euro class | EURO 0 |
| Average lifespan | 300 000 km |
Modification: 4G32T Turbo 8v
| Displacement | 1597 cc |
| Power system | Carburetor |
| Engine power | 120 hp |
| Torque | 172 Nm |
| Cylinder block | Cast iron R4 |
| Cylinder head | Aluminum 8v |
| Cylinder diameter | 76.9 mm |
| Stroke | 86 mm |
| Compression ratio | 7.6 |
| Engine features | No |
| Hydraulic compensators | No |
| Timing Chain/Belt | Belt |
| Variable Valve Timing (VVT) | No |
| Turbocharger | Yes |
| Oil capacity/Recommended oil | 3.5 l 5W-40 |
| Fuel type | Regular |
| Euro class | EURO 0 |
| Average lifespan | 200 000 km |
Modification: 4G32B ECI-multi 8v
| Displacement | 1597 cc |
| Power system | Injector |
| Engine power | 80 – 90 hp |
| Torque | 125 – 140 Nm |
| Cylinder block | Cast iron R4 |
| Cylinder head | Aluminum 8v |
| Cylinder diameter | 76.9 mm |
| Stroke | 86 mm |
| Compression ratio | 9.0 – 9.5 |
| Engine features | No |
| Hydraulic compensators | No |
| Timing Chain/Belt | Belt |
| Variable Valve Timing (VVT) | No |
| Turbocharger | No |
| Oil capacity/Recommended oil | 3.5 l 5W-40 |
| Fuel type | Regular |
| Euro class | EURO 1/2 |
| Average lifespan | 300 000 km |
The dry weight of the 4G32 engine is 130 kg
Engine number 4G32 is located on the joint between the block and the head
Fuel consumption Mitsubishi 4G32
The fuel consumption of the Mitsubishi 4G32 engine can vary depending on a number of factors, such as driving conditions, vehicle weight, and maintenance. However, on average, the 4G32 engine is known to have a relatively good fuel economy for its time.
The fuel consumption of the 4G32 engine can also be affected by the type of fuel used. It is recommended to use regular unleaded gasoline with an octane rating of 87 or higher for this engine.
According to some sources, the average fuel consumption of the 4G32 engine is around 8-10 liters per 100 kilometers (or approximately 20-25 miles per gallon) in city driving conditions, and around 6-8 liters per 100 kilometers (or approximately 30-35 miles per gallon) on the highway.
The table for Mitsubishi 4G32 engine maintenance:
| Maintenance Task | Frequency |
|---|---|
| Oil and filter change | Every 3,000 miles |
| Air filter replacement | Every 12,000 miles |
| Spark plug replacement | Every 12,000 miles |
| Coolant flush and refill | Every 30,000 miles |
| Valve clearance adjustment | Every 30,000 miles |
| Timing belt replacement | Every 60,000 miles |
It’s important to note that this table is just a general guideline and specific maintenance requirements may vary depending on the age, condition, and usage of your particular engine. Be sure to consult your owner’s manual for the recommended maintenance schedule and consult a qualified mechanic if you have any questions or concerns.
Which cars have the 4G32 1.6 l Engine
| 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 |
| Pony | 1975 – 1990 |
| Stellar | 1983 – 1987 |
Common Problems with the 4G32 Engine
The 4G32 engine has had some issues over the years, and here are some of the common problems that owners have reported:
Overheating
Overheating is a common issue with the 4G32 engine, and it can be caused by various factors, including a malfunctioning thermostat, clogged radiator, damaged water pump, or low coolant levels.
Oil Leaks
Oil leaks are another common problem with the 4G32 engine. They can be caused by a damaged oil pan gasket, worn out valve cover gasket, or faulty oil pressure switch.
Poor Fuel Economy
If you notice that your vehicle’s fuel economy has deteriorated, it could be due to a faulty carburetor, clogged fuel filter, or a malfunctioning fuel pump.
Rough Idle
A rough idle is a common problem with the 4G32 engine, and it can be caused by various factors, including a clogged air filter, worn out spark plugs, or a dirty carburetor.
Weak Acceleration
If your vehicle’s acceleration is weak, it could be due to a damaged distributor cap, faulty spark plug wires, or a clogged fuel filter.
Engine Misfires
Engine misfires occur when one or more cylinders fail to ignite properly. This can be caused by a faulty ignition coil, damaged spark plugs, or a clogged fuel injector.
Possible Solutions to the 4G32 Engine Problems
Here are some possible solutions to the common problems associated with the 4G32 engine:
Overheating
To solve overheating issues, you need to diagnose the underlying cause. If it’s a malfunctioning thermostat, replace it. If it’s a clogged radiator, have it flushed or replaced. If it’s a damaged water pump, replace it. Also, ensure that the coolant levels are topped up.
Oil Leaks
To solve oil leaks, identify the source of the leak and replace the damaged gasket or switch. Ensure that the engine oil is at the recommended level.
Poor Fuel Economy
To improve fuel economy, ensure that the carburetor is in good condition, replace the fuel filter, and check the fuel pump for faults.
Rough Idle
To fix a rough idle, replace the air filter, spark plugs, and clean the carburetor.
Weak Acceleration
To improve acceleration, replace the distributor cap, spark plug wires, and fuel filter.
Engine Misfires
To solve engine misfires, replace the faulty ignition coil, spark plugs, or fuel injector.
Prevention Tips
Prevention is better than cure, and here are some tips to prevent 4G32 engine problems:
- Change the engine oil regularly
- Use the recommended engine oil type
- Keep the coolant levels topped up
- Replace the air filter regularly
- Use high-quality spark plugs
- Avoid overloading the vehicle
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