Steam in expansion tank

The heater on my car is blowing cold, while steam comes from the expansion tank even when the car is cold. When warm, it bubbles (air escaping). I've tried normal bleeding up methods but they don't seem to work and tried running until hot and topping up next morning when cooled. So far replaced thermostat and water pump. However, what is most confusing is how steam comes immediately when fired up. Any ideas?

Asked on 8 November 2016 by westley liversidge

Answered by Test
Might be head gasket.
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