Had a strange overheating incident this morning and not really sure what to do. I was pulled in a drive through grabbing some breakfast when my temp needle started to spike. Went up almost into the red before I was able to pull it into the parking lot and shut it down. Then I raised the hood to let it air out. Wasn't sure what to do really. I did notice the overflow from the rad had puked out a little antifreeze but not much.

After sitting for ten minutes I started it up and it registered 3/4 hot and started to rise. I only had two blocks left to work so I wasn't really worried. As soon as I gunned it and got out into traffic, it immediately went down back to where it normally sits at about half way. Once I got to work, I sat at park and attempted to recreate the issue but it stayed right about half way.

Not sure what to think. It was similar to what happened to me last summer in this thread so I posted it here. But it was super hot out that day and today its really cool, like 38 degrees out.

Since last summer I have replaced the water pump and belts along with the pulley. Rad was flushed right when I got it and the thermostat was replace OEM. I notice I need a OEM cap and none of my rad hoses have been replaced yet.

Did I past a chunk of crap through my cooling system or is my head gasket giving me warning signs?