I was doing some pondering on my drive home last night, and I got to thinking about my heater core. It's old, and has a lot of miles on it. I got to wondering, if the heater core blows, could a person just vice grip off the hoses after the expansion tank Tee as a "get home" repair, or would the hoses need to be looped so that coolant is still flowing through them? Do the heater hoses NEED to be a flowing part of the system, or can they be blocked off as long as the expansion tank is still in the system? Thanks for the info.