Hey! I'm Archer_111 and I am the proud owner of a 2004 Mazda 6i with the 5 speed manual. I just replaced my PCV hose and valve to try to deal with some oil loss and rough idle. While putting everything back together, I noticed a mystery hose that seems to have broken off of the radiator. Can anyone tell me what this is and if it is important or not? I'm not sure if I broke it in the process of doing the pcv job or if it was already broken. Thanks!