Going to look at an 08 kr 6.4. I know what to look for on diesel trucks but would like to what to check out on the 6.4 to hopefully get a problem free truck.
Look to make sure it hasn't been puking coolant out of the degas bottle.
Also look and see if there are any coolant leaks near the radiator or egr system. For the most part the computer is sensitive enough to throw a code for any engine or transmission issues.