So last night i hit a deer
i get home and notice the damage is actually minimal, bodywork-wise. however, the grille was toast, front of the hood looks like tinfoil, and when i shut the car off a high-pressure gas hissing noise was heard from the radiator area. however, no steam was observed, and i couldn't pin down the source.
i assumed it was my radiator, and the coolant system. i went in disgusted and figured i'd come out to a puddle of coolant in the morning.
this morning, no coolant loss, car starts ok, so i let it heat up to try and reproduce the hissing noise. i got it into normal operating temp and left it for a while, shut it off, figuring that if it was steam in the coolant system or radiator i would be able to reproduce the sound.
question: is there some other gas besides steam from the coolant system that would've made the noise? is the radiator filled with something that could've leaked once and now is depleted?
i'd appreciate hearing from anyone with any insight on this.
thanks ahead of time.
edit: the car is a 2005 Legacy GT base model