Noticed a hissing sound coming from the back of the engine as well as a small coolant leak under the back of the engine. A little investigation shows a pinhole spray coming from a hose just above the EGR valve, almost dead center of the engine. Its not the top hose but the one just below it. This is a stock image from the online, I can't get a clear pic of the problem in the car. I think its the one I marked in the image. Can someone confirm this is a coolant hose and if so what the name is. Thanks.