Have a super hot day today in NSW and after getting to the place we are staying had coolant boiling out of the reservoir bottle.
Is this a sign of the dreaded head gasket problem?
A couple of trips after that incident the gauge would quickly shoot up to towards the upper white mark briefly but then come back down to the middle of the white marks. Twice now having to go up a super steep hill the temp gauge climbs and upon getting out can hear the reservoir boiling.
Car has 210k on it.
Thanks