Hey Folks.

Been reading everything I can in my free time about the 6.4 and I'm almost certain I'll be picking up the one in the local Ford lot tomorrow. Seems like a good engine with meticulous maintenance and some tips & tricks. It was previously owned by an older gentlemen to tow his 5ver around. I've never owned a diesel and don't do particularly well under the hood. I've compiled a short list of things that I might be able to check before I sign on the line.

Miles vs Hours - Is this as simple as clicking through the dash menu?

Check the upper fuel filter for gunk buildups

Check the upper fuel filter for signs of rust spots or metal flakes

Coolant nitrite test

Check for signs of leaks at radiator hose connections and the radiator itself


Anything else please let me know.

 

That's pretty much it. The hour meter is displayed under the system check displays, buttons Setup then Reset. Divide the miles by the hours to get the average speed, the higher the better, under 25 is considered to be a problem. My truck is usually around 45 since I minimize idling and get plenty of highway time.

Check the tailpipes for soot, which indicates a cracked DPF (or previously removed DPF). A cracked DPF is a $1,500 or so replacement. A previously removed DPF typically indicates "tuning" and likely abuse.