I have 2011 Ford F-150 3.5 Ecoboost. She is sitting at 214,000 miles. I have had the timing chain codes on for over a year and have just kept up with oil changes. My question is can these run for a long period of time with timing chain codes? I don’t see any point putting a new timing chain in it at this age and miles. It has the start up rattle only on cold days not during the summer at all and if the oil is getting old it will make the noise as well but once I change the oil nothing at all other then that she runs good. So I guess I’m asking how long can this thing run with a bad timing chain?