ok, so it fills the box on the engine side? that makes sense why it gushed out. i was thinking to myself there was no way itd have come from the hoses, not that fast.
its almost fixed, had 20min during lunch to fix it, other 40 was spent in autozones stragely long line. just need to put the interior stuff back on and refill the radiator after work. im so glad my heater core is so easy to get to