From the submitter:
A roll of plastic and three hours later, we could completely turn off one of the cooling units, which had been on full blast for years. The servers now breath in only cold air from the cooling units, and the cooling units only warm air from the servers.
Frankly, I am shocked and appalled that they found the blueprints to TIFI's server room.
Submitter Jax describes this fix: The bearings in this fan failed months ago. I kept it running by coating the shaft and bearings with oil as the fan spun. Today the bearings finally failed and the shaft kept popping out of the bearing sleeve, so I took the ink out of a pen, pressed it against the shaft, and put a rubber band against it to hold it in: a 100 dollar motor temporarily repaired with a 50 cent pen.