The Mitsubishi 6B31 3.0-liter V-shaped 6-cylinder engine has been produced since 2006 and is installed only on two well-known models: the Outlander crossover and the Pajero Sport SUV. This power unit is considered the top in the line of gasoline engines of the Japanese concern.
Specifications
| Production years | since 2006 |
| Displacement, cc | 2998 |
| Fuel system | injector |
| Power output, hp | 220 – 230 |
| Torque output, Nm | 276 – 291 |
| Cylinder block | aluminum V6 |
| Block head | aluminum 24v |
| Cylinder bore, mm | 87.6 |
| Piston stroke, mm | 82.9 |
| Compression ratio | 9.5-10.5 |
| Features | no |
| Hydraulic lifters | at exhaust camshaft |
| Timing drive | belt |
| Phase regulator | MIVEC |
| Turbocharging | no |
| Recommended engine oil | 5W-30 |
| Engine oil capacity, liter | 4.5 |
| Fuel type | petrol |
| Euro standards | EURO 4 |
| Fuel consumption, L/100 km (for Mitsubishi Outlander 2011) — city — highway — combined |
15.1 8.0 10.6 |
| Engine lifespan, km | ~300 000 |
| Weight, kg | 170 |
The engine was installed on:
- Mitsubishi Outlander CW in 2006 – 2012, Outlander GF since 2012;
- Mitsubishi Pajero Sport KH in 2010 – 2015, Pajero Sport KS since 2015.
Disadvantages of the Mitsubishi 6B31 engine
- For engines of the first years of production, there was a recall on replacing the intake manifold flap;s
- The engine often suffers from leaks, usually the cause is cracked valve covers;
- Timing belt life of 90,000 km can be drastically reduced if oil gets on it;
- The most dangerous problem is the drop in oil pump performance to 120 thousand km;
- First, hydraulic lifters knock, if you do not pay attention, then the engine wedges;
- On a run of more than 200 – 250 thousand km, the camshafts and their bed are usually already worn out;
- The power unit supports last up to 50,000 km, the catalyst crumbles after 150,000 km.
Frequently asked questions about the Mitsubishi 6B31
How much power does the Mitsubishi 6B31 make?
The Mitsubishi 6B31 develops 220 - 230 hp and 276 - 291 Nm of torque.
How much oil does the Mitsubishi 6B31 take and which one?
Engine oil capacity: 4.5 liters. Recommended oil: 5W-30.
Does the Mitsubishi 6B31 have a timing belt or chain?
The Mitsubishi 6B31 uses a timing belt.
Is the Mitsubishi 6B31 turbocharged?
No, the Mitsubishi 6B31 is naturally aspirated.
How long does the Mitsubishi 6B31 last?
The typical lifespan of the Mitsubishi 6B31 is ~300 000 km with proper maintenance.
What is the fuel consumption of the Mitsubishi 6B31?
Mitsubishi Outlander 2011: city 15.1, highway 8.0, combined 10.6 L/100 km.
What cars was the Mitsubishi 6B31 installed on?
Mitsubishi Outlander CW in 2006 - 2012, Outlander GF since 2012; Mitsubishi Pajero Sport KH in 2010 - 2015, Pajero Sport KS since 2015.
What are the common problems of the Mitsubishi 6B31?
For engines of the first years of production, there was a recall on replacing the intake manifold flap;s. The engine often suffers from leaks, usually the cause is cracked valve covers. All known problems.
Hydraulic lifters at exhaust camshaft
This is more understandable 🙂
Thank you!