Thanks Aussie, you certainly know your stuff.
Overheating wasnt a problem but im kinda paranoid about it blowing the headgasket. The water pump gasket was slightly leaking, when I pulled off the pump, and spinning it by hand, it sounded and felt kind of 'rough'. Decided to replace it while I was there because as you probably know, its not exactly a fun job and I didnt particulary want to do it again the near future.
Same went for the radiator, may as well give a thorough clean when I had the chance.
Went to my local Ford dealer and they dont even stock the Dual Acting Thermostats. :oo1: :oo1: Do you have an idea on what aftermarket brand is the best?