Hi! New here. We are thinking of buying a diesel Excursion. I know the 6L has issues and have a very basic idea of what to look for. Is there a place I can see pictures of what I should be looking for?

Here is the link to the one we are thinking about - anything stand out? I'm asking for more pictures and will likely go see in person tomorrow. Thanks

https://www.chapmandodge.com/Phoenix-Used-Cars-2003-Ford-Excursion-7D0015A.htm

 

I would not tell anyone without a basic knowledge of what to look for in a 6.0, and no way to monitor one during a test drive, to go buy one. At the least, one needs to be educated about potential issues and what readings are normal on something like a Scangauge II that many here use to monitor data live.
Here is one example. You test drive it, it drives nice and tight with good power.
A month down the road you discover you have a clogged oil cooler that you might have caught during the test drive when you noticed the temp spread between the engine coolant and the engine oil was 20+ degrees.

These are good engines when taken care of and very dependable. The example you gave us could very well be one of those trucks, it could also be something that the previous owner knew has issues and rather than fix them, trades it in a Dodge dealer to a salesman who has not even a remote clue about a 6.0

On the flip side, if you discover on your test drive, it has something that is not normal, can be a good tool for negotiating a lower price rather than the dealer sticking money into something they would rather not

A few obvious things would be any oil leaks under the engine
EGR cooler deleted
Any type of white residue around the cap on the degas bottle.
Take off the oil fill cap when it's warmed up and idling, if there is a good amount of blow by then something else is going on
Any previous repair records, anything.
The correct Ford oil filter cap, if not then the PO did not care about the fact it should only have an OEM cap and filter
How easy does it start, cold and hot.

 

Great advice Mike.

Records, records, and more records. Did the PO replace the problem hpop? EGR delete? Studded? Tunes?
I would get some diagnostics when driving if possible to get a head start on potential problems Before that wallet flies out of your pocket.