While trying to fill my system up with Freeze 12, the clutch lock up on my compressor cause the belt to squeal and smoke. This is the 2nd time it has locked up on me. The first time was about a month ago when I started the car. I was thinking it was the A.I.R pump because the bearings are going bad on that and making noise. So now that I am going to be replacing the A.I.R. pump and a/c compressor I decided to replace other items like the receiver dryer, orifice tube, belt, idler pully, maybe the tensioner, upper and lower radiator hoses (since I have to pull the radiator to get these pumps out), etc. Anyone have any advice on other items I should look at or replace and also any info on the dissasembly and reassembly to make it easier would be helpful. Thanks, Cadi197