Pretty harsh on the earlier Hemi's. Not biased even though I have a 2008. Will have to better educate myself on the failures since I've had several Hemi's in this date range and never had an issue.
I assume you are talking about the valve seat issue? If not please expand your comments. Thx
Having just suffered and recovered from the valve seat issue...I've done a TON of research on this. I'd argue the 2006-2008 4.7s and 3.7 are safe. It's JUST the 5.7 you want to avoid. Not only are the 2008+ safe from the valve seat, you also get the newer VVT (variable valve timing) engine that has better fuel economy and more power...plus all the extras that the newer trim line will include.
It's actually not a Jeep or XK year range problem specifically for the 5.7. It's actually a Gen3 Hemi range issue from 2003 to 2008. ALL Hemi vehicles are at risk for the valve seats and actually up to 2015 (or around that year) for failed lifters that take out the cam. The issues start arriving as early as 75,000miles but usually average around lower 100k. Mine was 113k. And of course some haven't happened yet...Most of the failed lifters I hear about are on Durangos and the cars around 2010 or 2011, and the lifter design wasn't changed from 2003 until around 2015. Lifter failure is much less common than the valve seats, but both are worthy of the "catastrophic" tag. With that said, a hot engine is what drops the seats. That's why they always die when you stop for gas on a road trip or something, engine is already well heated up and you pulled right off the freeway and quickly stopped, so it cooled rapidly and the aluminum heads vs the steel (?) seats and the seat just falls out. SOOOO, if you've always been real easy on the motor, always in a cooler climate, let it idle before shutting it off, or even just had a cooler thermostat...might never have an issue! Yes, sometimes the seat drops BECAUSE of a radiator that blew, fan that failed, thermostat fail, etc etc....but ultimately riding the line on the hot engine crammed in a tiny space.
Any quick google search about the hemi seats (not vehicle specific) and you have pages of those LX cars, but not many (if any) XKs, maybe a few WKs. Because there is SO many of those cars out on the roads. So yaaa, our sample rate is a little biased here because this is all we are and have, haha.
I think the major point here is that our XKs aren't getting any younger, so prices/values are dropping, etc. Do you want to take the risk or just buy into a safer year, or the 4.7?