My money's on a blown heater core.
NO! Not unless you bypass it as Behind-Bars suggested. Otherwise it will continue to leak all over your carpet as soon as you start the car.OK, so it's obviously my heater core... Am I safe driving JUST to work and back without the coolant leaking all over inside? (I work about a mile or less from home.)
Correct.the system is self purging
:tisk: Never, Never, Never fill it. Follow Subs advice.just fill it up until it wont take any more