Thats a known failure for these cars, they all will do it eventually. The plastice becomes brittle with age, using the proper coolant helps but eventually the neck will just snap off. Do a search thier has been a lot of discussion about this in the past.

I hope your car comes threw alright, hopefully the insurance company doesn't try to total it.

__________________
2016 Corvette Stingray 2LT
1969 280SE
2023 Ram 1500
2007 Tiara 3200