I figured I'd chime in with my story. I own a 2012 Durango, December 2011 build date, with the 3.6 Pentastar. Sure enough, it developed the tick a few months ago at ~4,000 miles. It did not however light a CEL. In any case, I took it to my local Chrysler/Dodge/Jeep dealer here in northern NJ, and it's been a fairly straightforward process. They gave me a loaner Liberty for a week while they did "performance tests" and contacted Chrysler. I got approved for a new head in late August. The head just arrived at the dealer, but I'll have to wait until late October to drop the Durango off again because the dealer has a backlog of heads to replace. He indicated that he's got four or five GCs in at the moment getting the head job done. Overall, while I'm not thrilled with the fact that my brand new $40k vehicle needs a head, at least the dealer and Chrysler have been very good about getting the repair done and not denying there's a problem despite there being no CEL. Regarding what's been reported in the press about this effecting very few vehicles (think I've heard 0.5%), I have my doubts. If my particular dealer, which is one of perhaps a dozen Jeep dealers in a 20 mile radius, has a backlong of head jobs, there must be many thousands nationwide getting it done.