You may not necessarily blown a gasket, but may have done some damage to the gaskets.
You didn't say what your engine is or mileage. I'd like to be positive about this, but you asked. Before my gaskets blew, I had temp readings all up and down. Found out the t-stat failed. There was no steam or smoke. It went directly to the shop. Gaskets had just started to fail.
Edit: Check your oil for a light tan foam. That would indicate coolant in the crankcase and a blown gasket.
Hope that yours are safe.
Last edited by soop; 10-09-2002 at 10:30 PM.