Driving home from Florissant at midnight and it was 10 below. It started to get hot so I pulled over and shut it off. Let it cool down for a bit and fired it back up and temp was normal again. Drove like mad to get to Divide so I wasn't stranded in the middle of nowhere. Never got hot again but it started pinging right as I came into town and then died. Checked the coolant and it was full but it seemed really hot. Never ran again so I hiched a ride to Woodland Park in a snow plow. I could tell the head gasket was blown so I got a new one and took it apart and there you have it. I think the thermostat froze or something because there wasnt a drop of coolant in the head.