He dp! Good to hear from you, happy new year!
Nope, haven't fixed and may never; it's not leaking (yet). I'm not going to be proactive on that, I guess. If I have to pull an engine, then a lot of other stuff would get looked at, and that $cares me...for example, the exhaust manifolds look like rusted hulks, the turbo is blowing oil from someplace, and I've never replaced the o-ring at the back of the engine.
I did just finally (after 226,000 miles) have to repair the oil cooler on the driver side of the engine, and driving back from up northern MN way, it puked several quarts from someplace else on the other side that I've not found yet. No leaks now, so maybe it was frozen up in there from the deep freeze of the far north and thawed as I drove it south.
Am looking at new trucks these days, even drove a '17 platinum 250 for grins -- hate the 'chrome package' on new fords it's too much bling for me, and I like the painted bumpers and other goodies on the platinum package. There were plenty (too many) gadgets and gauges on that truck...but can't find one w/o a sunroof and that is not on my list of things to want or need!
One brother is pushing me to Cummins/Dodge, and I do like the box sidewall tool storage (mega storage, I think it's called) but they're expensive, and well...Dodges. And I admit to secretly looking at the GMC K2500 in Denali trim...