This engine has known to have a few faults, which Isuzu to their credit have been rectifying, hence probably the new engine. Most of the vehicle is basically the same as the models before save the 3.0 engine. Many love it and it's a powerful engine when you get a good one. Must have the right oil in it though.
Ooooops!! Just read it's had a 2.8 bunged in, happy days then. There is a garage specializing in this conversion.

Oh bugger is it a 3.0 or a 2.8?