Oil your water pump?

[raymr]

I started hearing a loud buzzing noise whenever the engine was running, and I was afraid it was transmission related. But when I checked further I found it was coming out of the water pump. The I recalled my dad saying the water pump needs oil once in a while. Sure enough theres a little hole on top of the pump casting, and when I put in a few drops of motor oil, the buzzing went away. Weird, but it doesn't seem like a normal maintenence item. I thought water pumps are self lubricating.