2011 Aveo overheating, blowing out coolant

[avguy]

Have you or your mechanic been refilling coolant and bleeding air out of the system since this issue started? If not, it's likely that quite a bit of the coolant has been replaced by air that needs to be purged out.

[MuteMarmoset]

Have you or your mechanic been refilling coolant and bleeding air out of the system since this issue started? If not, it's likely that quite a bit of the coolant has been replaced by air that needs to be purged out.

The mechanics may have, I haven't. And I have put water in it twice this week. Is this something I can do myself today? before I take it out again? It only has water in it until we can stop the boiling/heating.