[gde061]

I am working on SIMPLE replacement of upper radiator hose (failed when the plastic quick connect by the block cracked). However this simple job is not going so well because of the stupid stuck o-ring problem others have mentioned repeatedly. I managed to get 2 of the 3 quick connects off by a combination of twisting side to side with a channel-lock, tapping with a plastic pry bar... but I am stuck on the quick connect at the radiator, which doesn't want to rotate at all, and looks like it's attached to another plastic (i.e., easy to break) fitting from the radiator.

I was considering trying to use a cut-off wheel, or even just an exact-o knive to slice through the quick connect plastic. Has anyone been successful with this method?

Also, once they are disconnect, what is the appropriate solvent to use to clean off the residue from the old o-ring, and what is thestuff right lubricant to use on the new o-ring (e.g., little bit of old engine oil?)