For reasons unknown the oil thermostat was replaced during the great motor debacle in the cars past (for those who don't have a photographic memory, the cars original motor and trans were lost in a fire, luckily the roller was outside the shop!).
It's been hanging on the wall (since what, 2015?) as an assembly including the trombone oil cooler and the old oil lines. Once in a while, it would drop a bit of oil for no reason at all.
I assumed it was going to be a huge PITA to break it free but surprisingly it wasn't. Not only that but it cleaned up with nothing more than a few minutes effort.
