Hey everyone, been reading on this site for a few months since buying my first 6.0. Thanks for all the help and info already!
FYI: 2003 F250 190k miles

One thing I can't find is everyone's opinion when there is not a problem... The truck has been bulletproofed by the previous owner except that it still has the green coolant. My delta never runs more than 10 degree and the truck runs great. I picked up an external coolant filter and have been trying to decide if I should do the coolant flush also. I've got a gallon of Restore and 1 gallon of new coolant already. My biggest fear is doing the flush and stirring up a problem that I currently do not have. "If it's not broke, don't fix it" kind of thing. What are your thoughts? Right now I'm leaning toward installing the filter system and not messing with the flush. Thanks again for all the help!

 

Are you sure that those early 6.0's used the old traditional green coolant, not the common gold as spec'd by Ford on the later 6.0's?
I'd check, knowing the additives, including phosphates, don't do you any favors, keeping the oil cooler from plugging.
Definitely add your coolant filter, knowing that the filters used, don't have additives to help plug it up even more.
Also, Ford recommends changing out the Gold every 105,000 miles so it's probably about time. What kind of coolant did you already buy?

 

Thats something that never crossed my mind, this is definitely not gold-ish in color. Now Im really not sure what I should do. It obviously been changed before, possibly when the head gasket and studs were done?
I started to buy the Zerex Extended Life concentrated coolant. Maybe just to be safe I will get the green stuff out and do the whole flush any way.

 

Flush it with just water since your temps are good and go to a red elc coolant. Don't bother with the gold. If you use the chemicals you will more than likely plug your oil cooler. No 6.0 ever came with green coolant only the crappy ford gold.

 

Thanks for the help guys. Looks like my Saturday is booked