i have recently took a 1996 impreza wrx in px
and iv had it 2 days and its throwing the water out of the expansion bottle near the battery but only when the car has been driven hard
the radiator hoses seem to pressure very hard

but if i leave it to idle for a hour it doesnt do it

im woundering if my head gaskets gone
i have no over heating
no oil in water
no water in oil
thermostat opens at right temp
fans come in then go straight off

i have it booked into a local garage for a pressure test on friday

iv been reading a few posts and some people seem to think it could be a crack in the turbo as it only does it when driven hard

hope this makes sense

thanks every one