2011 Pajero Sport 2.5L Eng Upgrades : Mu-7 4Wd Mode

[luwahn]

What are the upgrades of the Mitsubishi 2011 2.5L (Pajero Sport) engine?

Knowing that the 4WD mode of the MU-7 is not to be used on 'normal' dry pavement, what tell-tale indications of any mechanical / operational damage will be noticed if someone happens to drive a MU-7 in 4WD (high) mode on 'normal' dry pavement, let's say, up to 3 times a month?

[MoonRiverOasis]

The Jan 2011 upgrades to the Mistu 4D56 engine were a new head design, upgrade to a variable geometry turbo, and a new ECU (which also added support for the 5AT and paddle shifters). Power went from 140HP to 178HP, torque also increased to 400Nm, but is electronically limited 350Nm on 5AT models.

As for driving the MU-7 in 4H on dry pavement, all you can hope is that the transfer case gives some level of audible cruching/grinding warning before it lets go.... Absolutely not recommended, even if "only 3 times a month".

Note that the Pajero Sport 4WD and August 2008+ Fortuner both use viscous couplings, so are suitable for full-time 4WD.

Edit: Note that there was another minor revision for the 4D56 in Nov 2011, which added a particuate filter for Euro4 compliance. No change to power/torque with that revision though.

[luwahn]

The Jan 2011 upgrades to the Mistu 4D56 engine were a new head design, upgrade to a variable geometry turbo, and a new ECU (which also added support for the 5AT and paddle shifters). Power went from 140HP to 178HP, torque also increased to 400Nm, but is electronically limited 350Nm on 5AT models.

As for driving the MU-7 in 4H on dry pavement, all you can hope is that the transfer case gives some level of audible cruching/grinding warning before it lets go.... Absolutely not recommended, even if "only 3 times a month".

Note that the Pajero Sport 4WD and August 2008+ Fortuner both use viscous couplings, so are suitable for full-time 4WD.

Edit: Note that there was another minor revision for the 4D56 in Nov 2011, which added a particuate filter for Euro4 compliance. No change to power/torque with that revision though.

Thanks for the very informative answer, it really helps!