Ari,

I replaced mine a while back.  It seems that once the oil filter is
removed, you can remove a rather large flat nut, this holds the oil
cooler on.

What I did what to purchase both hoses, and the large O ring that seals
the oil cooler to the block. I then removed the items above, CUT both
coolant hoses on the van and slid the whole assembly off.

By looking at the setup, you'll need to determine which two hose
connections of the four, i.e. two per hose, that are best done while the
cooler is off the vehicle, and which two are POSSIBLE on the vehicle.

I feel this the best way, cutting the old hose in the middle somewhere,
since you don't have to try and break the adhesive nature of the old
hose on to the nipple. Plus with the cooler removed access improves dramatically,

I hope this helps,

Sincerely,

Mark Keller
91 Carat
Cowichan Bay, BC