So I'm a new member here that just bought a 2002 WRX sedan. love it. Excuse my low level of knowledge but yesterday after driving, my car would start producing white smoke from the hood scoop and right side (the side of the turbo). I had noticed a few days prior that I had replaced my coolant after my mechanic said it had leaked into the water pump but fixed it. Now after the smoke started showing up, I checked my coolant level and it went from 1/3 to almost empty, in a matter of a day. I am not sure what are the possibilities of this, maybe a head gasket? Sorry, but it would be great if you guys could add some input or perhaps give me a method to check other possibly affected components of the car. Thanks!