Japanese kei cars, such as the comparatively well-liked Pajero Mini, were equipped with the 0.7-liter Mitsubishi 4A30 engine and the 4A30T turbo version, which were manufactured between 1993 and 2012. Both carburetor and injector modifications were available for this power unit.
The 4A31 engine is another member of the 4A3 family.
The engine was mounted 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
Overheating or overtightening the bolts frequently causes the aluminum block head to crack;
It usually helps to replace one of the unit’s pillows when it vibrates violently;
Certain motor modifications come with a turbine, which has a limited lifespan;
You must replace the timing belt every 90,000 kilometers and adjust the valves every 50,000 kilometers;
Oil burn starts after 100,000 kilometers because of valve seal or ring wear.