she hasnt posted back about how it blew in the first place but ez30 are also prone to head gasket failure albeit generally not in timeframe of first owner. overheating can be symptom of imminent fail, but it is def driveable for a block or two; if radiator is pressurised enough from exhast gauses then it cracks, and hereby atf line can be damaged.
this can be remedied with an aluminum radiator, which will hold through that pressure, and a separate cooler for the atf line; however, the drawback is that you may be filling coolant by the block as coolant blows through the exhaust, but it is manageable if you are driving limited distances, and these parts carry over if you service or replace the motor
in this contingency HG repair costs can essentially total the vehicle. the alternative is to replace motor outright; if you source it from lkq the pricing on anything over 100k makes it very affordable, but in comparison 100k almost seems brand new. i def want to help her out the most i can so just wanted to mention