possibly, you can get a lot of condensation in the breathers if left lying around etc or short journeys, so that could be the cause,
you need to be watching your temp gauge for any unexpected movement
watch for the heaters going cold
and obviously keep an eye on the coolant level, if you need to keep topping it up
then you have a problem
but it could just be down to having been laid up
so try giving it a good run 1st