I'm changing out the coolant in my 02 expedition. Now I have read tech articles on how to do it on 5.4 trucks (drain radiator, drain block, flush with water, drain again, fill with coolant/water to liking, etc), but I was wondering if there was anything more to do on an expedition with all the extra rear heating-cooling stuff?

 

Since the filler bottle is the highest point of the cooling system, you should have no trouble getting any air out of the system. It hasn't been on my 99 5.4.