The Mitsubishi 3B20T 0.7-liter 3-cylinder turbo engine was produced from 2006 to 2020 and was installed on such popular kei cars as the eK Custom, eK Wagon and the similar Nissan Dayz. There are two generations of this power unit: for the i model and for the eK line of kei cars.
The 3B2 family also includes engines: 3B20, 3B21 and 3B21T.
The engine was installed 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
- For a tiny turbo engine, this engine is quite reliable, it has no weak points;
- It is very important to monitor the cooling system, it immediately leads the head from overheating;
- Grease often pours into candle wells due to hardened o-rings;
- After 150 thousand kilometers, oil consumption and timing chain stretch are common;
- There are no hydraulic lifters and valve clearances need to be adjusted every 100,000 km.
