Ok to start with my 93 civic hatch has an LS/VTEC. head is out of an 00 SI and the block is out of a 93 integra. I bought the Thermostat for the 93 integra. It is very cold here and my car was not warming up at all. The heater was barely getting warm. I figured it was the Thermostat. I replaced it last night and started my car. The engine got really hot and the heater is blowing Ice cold air. Now what the crap do i do? Could it just be a bad Thermostat? Why would the air be blowing so cold when the engine is so hot? Please help I can't drive my car now because it will over heat.