It's been back and forth to mechanics, no idea what's wrong with it. I don't know much about engines which doesn't help. so far I've only taken it to a 'general' mechanic because they are close to my work. Ive had it pressure tested which came out fine apparently, I gave him the technical manual for bleeding the system, but he didn't get much air out. Most recently I had an auto electrician check my thermo fan's which weren't working. They've wired up one of the fans to a manual switch, which has helped a lot, but still not 100%. Im at a loss what to do now, and I don't have the money to chuck at it in hope for a fix.
I should really start my own thread up rather than keep going off topic in these meetup threads :P