Well she ran all day at 160 degrees! SHE IS FIXED!!! If i had to point my finger at one thing that caused this issue I couldn't. I guess it is possible that there was debris inside the engine that a flushed out and didn't see, but their was not that was obvious. There was a small amount of rust shale that came out of the motor but that was it. I was really concerned that a cylinder head had cracked or a head gasket had failed. Thanks again for everyone's input on this.