Haha funny you should mention vacuum lines, the previous owner said he replaced a few, perhaps he messed something up? I'll try the coolant flush, using the bleeders, and I'll look up the procedure in Mitchell when I'm at work next time so I get the bleeding procedure right... apparently it's quite the process. Any ideas about the oil leak...? It seems to be coming from the rear of the motor... valve cover maybe?? And the idle is so much rough, it just fluctuates and sort of bogs I guess would be the term, typically when rolling to a stop, around 20-15 km/hr downward, seems worse under heavy braking, nearly stalls, most of the time when sitting still it's when the fan cuts in, which is worrying :S