Please tell me you fixed. I had the same problem. Did not bleed properly.
2 blocks from home, needle on Red, trying to get over to the side of the road.
BOOOOOOM!!!!!! my plastic thermostat housing blew wide open!
BOOOOM!???... ummm. i suggest you have the car checked out. Check for water in oil... or oil in coolant. Unless the t-stat/t-stat housing was defective, for it go BOOOM tells me that engine compression is leaking into your cooling system. *sigh... i hate to be the bearer of bad news :-(
Either way, replace the part, bleed properly and let us see... with some luck it was just steam that did the t-stat housing in ;-) You will know if there's engine damage... rough idling sputtering, and the like. (I sure hope not)
Do a compression check on all cylinders, and while you are at it, check for traces of coolant in plugs.
Good Luck