We got this car really cheap from a friend since it leaks coolant (it runs out in about ten minutes of driving). My wife noticed the other day this hose that is not connected to anything (shown below) when she was filling up the reservoir and it made a sucking sound and coolant leaked out of the hose.
For the life of me, I can't find anywhere to attach it to. Is it an air intake? Since coolant is leaking out of it does that mean there's back pressure from the engine?