when you changed the oil cooler did you flush the cooling system? your new cooler could be plugged up with the same sediment that killed your first one. I did the full flush procedure recently and couldnt believe how much crap was in the system. if it is plugged up, you might be able to save it with the reverse flush procedure. I found this very useful
http://www.powerstroke.org/forum/6-0-maintanence-info/203548-flushing-cleaning-6-0-a.html
http://www.powerstroke.org/forum/6-0-maintanence-info/203548-flushing-cleaning-6-0-a.html
