My head gasket recently blew up, as there was not enough coolant in the car. No warning light came on, what would be a reason no warning light came on and why would the temperature gage read as normal?

I am currently working through this being a warranty cost and not a personal cost. Any help would be appreciated.

Cheers John

every time I start the engine( I don't touch the pedal) the car revs up real fast and the dachometer needle goes up real fast and comes back to between 1 and 2. This happens everytime I start this car.