Thanks to everyone who replied to my other posts. I took it to a garage and he supposedly fixed it, but after a couple of drives around the block, the temp was up in the red again.
But it gets worse... The water in the coolant tank is now dark, murky grey/black stuff, instead of the clear orange water it used to be.
How could this happen? (I've got a really bad feeling about it).
I'm taking it back to the garage tonight but I would appreciate your thoughts too.
thanks Owen