How to drain coolant from a Fiat Brava?
air in system then you got a bad head gasket or not filling it right way really to remove air just crank motor with cap off radiator let run a few minutes keep adding coolant or water til it stops taking it or by driving it and refilling shouldnt have to drain it but all car have a drain on bottom of radiator bottom side an dif you cant do it that way just remove radiator hose at bottom of radiator sorry dont think that wil help your air problem an dsure you can flush it any time now wouldbe great since yo u got it part of the way a part