Right after that pic, I put the fan in and started pouring coolant only to find a steady light drip (one drop every 23 seconds) from the lower radiator outlet.
I then dropped enough F-bombs to make Nagasaki look like a birthday cake and went and found something else to do.
Once I got the energy to face my situation, I drained the fluid, capturing what I could, and yanked the cooler which had been in place since prepping for the move 17 months ago.
My first suspicion was, is it out of round? Well, it was...
This was handily remedied with a large wood clamp. Then, I laid it frontside down and filled it up with water to see if there were any compromises to the hull. There was one.
Slowly seeping at about the same rate as what I observed installed in the car.
Peering inside the outlet, I can clearly see and feel this hairline crack...
So now I seek the wisdom of the council elders. Can it be soldered? Brazed? Some nefarious goo? Guide me, wise ones.