To have or not to have?

[Elgrano]

Quick question guys...
I had an over-heating problem on my mustang...it was using all the water from the water container on a 30 min trip. I took my car to the mechanic and I he told me that my thermostat was the problem...so he took it out. Right now I don't have a thermostat, is this ok?

 

[Mach428]

As of right now thats fine, just make sure you get one in or else once there's cold weather you won't have any heat