I just wanted to say a general thank you to the posters in here as I was able to find all the information I needed to diagnose and change my thermostat (including finding an alfa parts shop on the internet)
Its never worked in all the time we've had it - I just thought 50-60 was the normal operating range.
Its made quite a difference to performance and fuel consumption!
I am just a little disappointed that the alfaworkshop didn't tell me it wasn't working when I had them do a major service and cambelt about month after we bought it.
Without this forum it would still be running cold.