It seems I'm spamming this forum, but I hope everyone takes this as a positive since I keep coming back for more help from the group.
On topic: since I just got a 2nd hand Pajero, obviously I've checked different units prior to selecting what I have bought, I've noticed the engine ticking/clicking sound all too common on this model (4th gen). Some had louder noise than others, but all seems to have this sound up to a certain extent. So I figured that the car I had selected is ok for it to have said sound since its a Pajero thing.
I've been reading about this and can see that its a common issue for Mitsu V6 engines. Culprit seems to be the valve lifters (lifter tick as its commonly referred to according to the internet). I've come across fixes as well, ranging from warming up (rev to 3000rpm for 15secs), to changing oil type, overfilling oil by 500ml, diesel flush, etc. etc., with each having positive and negative reviews.
For the 4th Gen owners out there, or even older models as it seems to be present on earlier Pajero iterations as well, do you also experience this? If yes, have you done something about it?
This video seems to be the closest to what I've been hearing: