Strong smell of exhaust fumes inside car. on 2001 Subaru Impreza

while driving with the heater on, strong fumes in car- had to turn off heater and drive with windows open in freezing temps! think i saw a greenish liquid under car on road after I parked.

Asked by for the 2001 Subaru Impreza
Sounds like you may have blown the head gasket and it is leaking on the exhaust, thus the green fluid and the bad smell.

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