Oil Temperature Sensor Removal

Assuming that the radiator is just held on by that bracket and the radiator hoses are flexible then I would undo the bracket and lower it enough to get a spanner on the sensor. If the hoses are rigid then I would just disconnect the radiator and catch the coolant in a clean container and then you can reuse it.

That what I assumed.  Was trying to avoid removing fluids but looks like there is no way around it. I also noticed that the torque is 15nm vs the Coolant temp sensors, which are 7nm.  Unless I am reading it wrong.

Oh well, time to get wet. Appreciate the advice!!!!

You could always clamp the hoses to minimise the coolant loss.