OverHeating 89

[OverHeater]

Have an 89 325 ic that was in storage for about 6 mos, took it out and was driving without issue for a few days, after about a 20 min drive, I stopped at home and left the car idling outside for 5 minutes (longer than i was expecting), when i returned, the car was overheating and steam was spraying into the footwell by the gas pedal. I let it cool off and checked the coolent level, which was now low (not sure how full it was before). I added some more coolent, but it's still overheating after running for more than a few mins.

What could this be? Is it anything simple enough to try to remedy on my own?

Thanks in advance for advice.

 

[echothreezero]

Steam inside the car? sounds like something to do with your heater core as that is the only place coolant enters the car.

Overheating could be caused by: Blown head gasket (look for milkyness in the oil)

Faulty thermostat (stays closed so no circulation) - need to remove to test.
Faulty water pump - ditto.
Cracked or blocked hoses.
leaky radiator
faulty heater core - most liekly scenario for you.