hi thanks for getting back to me
No i havn't topped it up for a while as when the coolant returns its always just below the max mark.
I have checked the oil and the water and dosn't seem to have mixed together (the oil on the cap opening and the dip stick all look perfect normal no milky substance) the coolant also looks clean.
Nothing has been done to the car for about 3 months but I have also noticed a slight missing from the engine
since the coolant problem started, I'm not sure if these are connected?
I dont think i'm losing coolant, I'm not sure how to check for a airlock, all the pipes seem to be like new and no obvious sign of wear. I havn't noticed any wet patches under the engine when leaving the car overnight in the garage.
Is there any way I can check to make sure that my head gasket is not had it? If that goes I will have to say bye bye to my beloved alfa.