I'm posting this in the wrong section for a reason, double the help, 2005 4.7 212000 miles just recently started eating antifreeze, no check engine light for mis fire, no smoke out of exhaust and when I remove radiator cap and start truck no bubbles, but everytime I fill over flow bottle it seems within a week its bone dry, did and oil change and seemed fine. and no visible odor when heat is on. I'm stumped.

 

Pressure test the cooling system....... see if anything drips.

 

Well, there are two things you can do immediately.

1. Rent a block tester from any auto parts store. It sniffs the coolant for any combustion gases and changes a liquid from blue to yellow/green if found. Plenty of videos on youtube and there is one I made in 2nd link below. If gases are found, your head gasket is leaking.

2. If #1 turns out to be okay and there are no gases, get a pressure tester and test to max PSI marked on radiator cap. See if it loses pressure outside of allowable limit, or if it leaks.

I'm well familiar with what you're going through, but was able to resolve it on the cheap...

https://dodgeforum.com/forum/2nd-gen...loss-4-7l.html

Block test video here...
https://dodgeforum.com/forum/2nd-gen...t-options.html