Coolant spraying... What is going on?

[dhirocz]

How full is the reservoir when you start it cold? Does it spray immediately and from where exactly?

I had a similar issue, come to find out it was because when the coolant started to get hot, the cap couldn't hold the pressure, so it just started spraying out of the overflow. Then when it cooled off, the bottle was low. New cap fixed it. Keep a spare under my bunk now.