Yeah, I used two wrenches –– one on the hex, one on the compression nut ––but the wrench I had on the line nut was way bigger and longer, and I just over-torqued it. Of course, the whole time, I was wondering why the cooler line was bending toward me –– ripping off gradually. That + 3 days of Liquidwrench and nothing. Looks like I'm in the market for another oil cooler, preferably one whose threads have been retapped.

__________________
1983 300CDT -- 177K