Produced between 2006 and 2020, the Mitsubishi 3B20T 0.7-liter 3-cylinder turbo engine was fitted to popular Kei vehicles like the eK Custom, eK Wagon, and the comparable Nissan Dayz. This power unit comes in two generations: one for the i model and another for the eK line of Kei vehicles.
The engines 3B20, 3B21, and 3B21T are also members of the 3B2 family.
The engine was mounted on:
- Mitsubishi i 1 (HA1) in 2006 – 2013;
- Mitsubishi eK Custom 1 (B11) in 2013 – 2019;
- Mitsubishi eK Space 1 (B11) in 2014 – 2020;
- Mitsubishi eK Wagon 1 (B11) in 2013 – 2019;
- Nissan Dayz 1 (B21) in 2013 – 2019;
- Nissan Dayz Roox 1 (B21) in 2014 – 2020.
Specifications
| Production years | 2006-2020 |
| Displacement, cc | 659 |
| Fuel system | distributed injection |
| Power output, hp | 64 |
| Torque output, Nm | 94 – 100 |
| Cylinder block | aluminum R3 |
| Block head | aluminum 12v |
| Cylinder bore, mm | 65.4 |
| Piston stroke, mm | 65.4 |
| Compression ratio | 8.8 – 9.0 |
| Features | DOHC |
| Hydraulic lifters | no |
| Timing drive | chain |
| Phase regulator | MIVEC |
| Turbocharging | MHI TD02M2 |
| Recommended engine oil | 5W-30 |
| Engine oil capacity, liter | 3.4 |
| Fuel type | petrol |
| Euro standards | EURO 4/5 |
| Fuel consumption, L/100 km (for Mitsubishi eK Wagon 2015) — city — highway — combined |
5.7 3.6 4.3 |
| Engine lifespan, km | ~180 000 |
| Weight, kg | 69 (without attachments) |
Disadvantages of the Mitsubishi 3B20T engine
This engine has no weaknesses and is very dependable for a small turbo engine;
Monitoring the cooling system is crucial because it prevents the head from overheating right away;
Oil consumption and timing chain stretch are common after 150,000 kilometers; hardened o-rings frequently cause grease to pour into candle wells;
Every 100,000 kilometers, valve clearances must be changed because there are no hydraulic lifters.