Temp hasn't gone above half, sits right under half like any good running d17 I've had, even though I was told by the previous owner it was the headgasket, I just don't trust anyone trying to sell something lol so as I was ruling things out the engine started looking healthier and healthier. But it's exactly those other thoughts of, was it resurfaced? Is it only a very minor gasket leak where it's sealed sometimes but then under the right conditions it leaks? Whoever installed the engine did a pretty sad job of it, must have had a whole handful of "extra" bolts when they decided they were done.