Not really following you Inuendo? But the crux of it is, you need to loosen the belt. I only put the rad back in my ute the other day, and you can’t get to all four bolts that hold the fan onto the water pump with out turning it (that’s the vicious fan).
Do you mean the pulley will pop off with the bolts out and the belt tensioned? Yes that would be a bit of a risk to the fingers when the tension was released.