The 0.7-liter Mitsubishi 4A30 engine and the 4A30T turbo version were produced from 1993 to 2012 and installed on Japanese kei cars, including the relatively popular Pajero Mini. This power unit was offered both in carburetor and injector modifications.
The 4A3 family also includes engines: 4A31.
The engine was installed on:
- Mitsubishi Minica H30 in 1993 – 1998;
- Mitsubishi Pistachio H44 in 1998 – 2000;
- Mitsubishi Pajero Mini 1 (H51) in 1994 – 1998;
- Mitsubishi Pajero Mini 2 (H53) in 1998 – 2012;
- Nissan Kix in 2008 – 2012.
Specifications
| Production years | 1993-2012 |
| Displacement, cc | 659 |
| Fuel system | carburetor (4A30 carb) injector (4A30 inj) injector (4A30T turbo) |
| Power output, hp | 50 (4A30 carb) 55 (4A30 inj) 64 (4A30T turbo) |
| Torque output, Nm | 56 (4A30 carb) 60 (4A30 inj) 97 (4A30T turbo) |
| Cylinder block | cast iron R4 |
| Block head | aluminum 16v |
| Cylinder bore, mm | 60 |
| Piston stroke, mm | 58.3 |
| Compression ratio | 10.0 (4A30 carb) 10.0 (4A30 inj) 8.5 (4A30T turbo) |
| Features | SOHC (4A30 carb) SOHC (4A30 inj) DOHC (4A30T turbo) |
| Hydraulic lifters | no |
| Timing drive | belt |
| Phase regulator | no |
| Turbocharging | no (4A30 carb) no (4A30 inj) yes (4A30T turbo) |
| Recommended engine oil | 5W-30 (4A30 carb) 5W-30 (4A30 inj) 10W-30 (4A30T turbo) |
| Engine oil capacity, liter | 3.4-3.5 |
| Fuel type | petrol |
| Euro standards | EURO 0 (4A30 carb) EURO 2/3/4 (4A30 inj) EURO 3/4 (4A30T turbo) |
| Fuel consumption, L/100 km (for Mitsubishi Pajero Mini 2010) — city — highway — combined |
8.5 5.0 6.4 |
| Engine lifespan, km | ~200 000 |
| Weight, kg | 104 |
Disadvantages of the Mitsubishi 4A30 engine
- The aluminum block head often cracks from overheating or overtightening the bolts;
- With strong vibrations of the unit, most often it helps to replace one of its pillows;
- Some modifications of the motor are equipped with a turbine, the service life of which is short;
- Every 50,000 km, you need to adjust the valves, every 90,000 km, change the timing belt;
- After 100,000 km, oil burn begins due to wear of rings or valve seals.
