03 Navigator Cold Weather Operation
Just got a 03 Navigator (project) with 5.4 4 valve engine with 116K that suspension and some options were inop. After shop diagnosed and replaced fuse box, air compressor relay and door switch the air...
Forum Discussion
The coolant overflow wasn't low after this procedure so didn't add any antifreeze. HOAT??? Never heard of that before I guess I have to read up more, whatever happened to the days where there was just one coolant? lol
The temps dropped here to the negatives so won't be doing anything soon but will probably have a shop do a test and flush. Is the Ford recommended coolant good? I know many don't like the Ford Gold that is recommended for my 03 Excursion which has Amsoil ELC instead.
The temps dropped here to the negatives so won't be doing anything soon but will probably have a shop do a test and flush. Is the Ford recommended coolant good? I know many don't like the Ford Gold that is recommended for my 03 Excursion which has Amsoil ELC instead.
BenK wrote:
Be sure to flush the coolant system, as a 2003 will have HOATs (Hybrid Organic
Acid Technology) coolant...which does NOT like O2/Air in the system
What did you top up the coolant system with?
Since it is 11 years old and ask if you know the previous owner(s) ever flushed?
Suggest to be safe and flush with whatever your manual says (HOATs) since you have
opened up the system to expose O2/Air into it.
Always glad to hear someone's DIY success stories !!!
