The 0.7-liter 3-cylinder Mitsubishi 3B20 engine was produced in Japan from 2006 to 2020 and was installed on the eK Custom, eK Space, eK Wagon and similar Nissan Dayz and Dayz Roox kei cars. This power unit exists in two generations: for the i model and for the eK family of kei cars.
3B2 family: 3B20, 3B20T, 3B21, 3B21T.
Specifications
| Production years | 2006-2020 |
| Displacement, cc | 659 |
| Fuel system | distributed injection |
| Power output, hp | 49 – 52 |
| Torque output, Nm | 56 – 59 |
| Cylinder block | aluminum R3 |
| Block head | aluminum 12v |
| Cylinder bore, mm | 65.4 |
| Piston stroke, mm | 65.4 |
| Compression ratio | 10.8 – 12.0 |
| Features | DOHC |
| Hydraulic lifters | no |
| Timing drive | chain |
| Phase regulator | MIVEC |
| Turbocharging | no |
| 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 Custom 2014) — city — highway — combined |
5.2 3.2 4.0 |
| Engine lifespan, km | ~200 000 |
| Weight, kg | 67 (without attachments) |
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.
Disadvantages of the Mitsubishi 3B20 engine
- For such a volume, this unit is quite reliable and serves up to 200,000 km without problems.
- On long runs, oil consumption or timing chain stretching is often encountered.
- Keep the cooling system clean, from any overheating here leads the head.
- Hardened o-rings can cause grease to seep into spark plug wells.
- There are no hydraulic lifters and valve clearances will have to be adjusted every 100,000 km.
Frequently asked questions about the Mitsubishi 3B20
How much power does the Mitsubishi 3B20 make?
The Mitsubishi 3B20 develops 49 - 52 hp and 56 - 59 Nm of torque.
How much oil does the Mitsubishi 3B20 take and which one?
Engine oil capacity: 3.4 liters. Recommended oil: 5W-30.
Does the Mitsubishi 3B20 have a timing belt or chain?
The Mitsubishi 3B20 uses a timing chain.
Is the Mitsubishi 3B20 turbocharged?
No, the Mitsubishi 3B20 is naturally aspirated.
Does the Mitsubishi 3B20 need valve clearance adjustment?
Yes, there are no hydraulic lifters, so the valve clearances have to be checked and adjusted periodically.
How long does the Mitsubishi 3B20 last?
The typical lifespan of the Mitsubishi 3B20 is ~200 000 km with proper maintenance.
What is the fuel consumption of the Mitsubishi 3B20?
Mitsubishi eK Custom 2014: city 5.2, highway 3.2, combined 4.0 L/100 km.
What cars was the Mitsubishi 3B20 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.
What are the common problems of the Mitsubishi 3B20?
For such a volume, this unit is quite reliable and serves up to 200,000 km without problems. On long runs, oil consumption or timing chain stretching is often encountered. All known problems.
Hello, what is the intake and exhaust valve clearance on this engine?