Walk me through the cooling system?

[Markt213]

AZ986s is probably right. Try re draining the fluid into a very clean container so you can reuse it and use a vacuum system to check for leaks and refill. I bought a vacuum system from Amazon for $60 it makes refilling with out air pockets so much easier. I still left the bleeder open for a few days but only had to top off a cup or so of coolant.
Cheers