Alan wrx-sti

I put a post on here a couple of weeks ago stating I was losing coolant through the expansion tank, well took it to my local subaru dealer they said there was a fault with the Radiator Cap so they replaced that and the car has been running great for about the last week.
Took it out for a run this morning stopped at lights and there was lots and lots of steam coming from under the bonnet pull over and checked to see what was going on and all the coolant has escaped from some where on the left hand side as you can see from the picture.



Not sure where it could be coming from or what could be causing this?? any idea's out there....

thanks in advance.

911

The only wartery bits down there are the hoses you can see and the one end cap of the radiator.
It could be a split end cap or a split expansion tank.
Best course is to have it pressure checked.

Be happy, probably not a head gasket!

Graham.