Engine Mitsubishi 6B31

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.

The engine was installed on:

  • Mitsubishi Outlander CW in 2006 – 2012;
  • Mitsubishi Outlander GF since 2012;
  • Mitsubishi Pajero Sport KH in 2010 – 2015;
  • Mitsubishi Pajero Sport KS since 2015.


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
Engine lifespan, km ~300 000
Weight, kg 170

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.

2 thoughts on “Engine Mitsubishi 6B31”

Leave a Comment

Your email address will not be published. Required fields are marked *

Scroll to Top