No heater core,what to do with lines?

[WFOVR4]

I am not running the haeter core on my VR4 rally car, what shoul I do with the lines. Plug them or loop it. I have been having an over heating problem with them plugged, is this whats causing it. Thanks WFO

 

[Agent Ezzard]

I had mine looped for a month or so a while back and experienced no overheating. It could be some air trapped in the cooling system.