Hard to tell in the dark, but I assume that the coolant level sensor is supposed to thread into a pipe-lookin' thing that sticks out of the radiator ... and said pipe should not turn, right? 
The sensor is all gunked up, it's been leaking ... figgered I'd take it out, wire brush it, and put it back in ... but now the entire assembly, i.e. the sensor and the little stub it's on, are turning.
I suppose one could rebraze the thing back onto the radiator... but I suspect it's new radiator time.
Any input?
-- A

The sensor is all gunked up, it's been leaking ... figgered I'd take it out, wire brush it, and put it back in ... but now the entire assembly, i.e. the sensor and the little stub it's on, are turning.

I suppose one could rebraze the thing back onto the radiator... but I suspect it's new radiator time.
Any input?
-- A