Hi rob, yes clicking/ticking there when air con off, it's not there when engine is cold, noise starts when car is at normal running temp (gauge half way) had it looked at buy a couple different Indy garages now and none can pinpoint it so think it's going to be prosses of elimination, iv just purchesed a cheap vacuum pump from eBay, swap them over and see if any difference, in mean time wile I'm waiting will get air con checked..
These things are sent to try us, and God dam this is trying me.ha.
Hate these types of problems, (if any) I much prefer somthing to break then can fix/replace it and move on.