I have a 2011 328i 3l convert/hardtop. I have had nothing but rotten luck the past 3 months with this thing. All the previous post were because I bought a brand new starter that was no good. I assumed it was because it was new in the box. Just because it's new don't mean a thing. So now to the present mess. I got it all back together and cranked it and she run fine so I drove it to the store. When I got back and pulled into the drive I heard a loud spraying sound and steam coming from the hood. I shut it down opened the hood but saw nothing but a little steam. Then all of a sudden a blast of steam comes out of the left side of the motor towards the front and it blast then quite then a couple of seconds latter it did it again and it sounded exactly like a pressure relief valve. I'm praying that there is one because if not and it not some sort of hose then guess what (head gasket). But I have been working on motors for over 50 years (mostly 50's & 60's & 70's) but I have never seen or herd of this. Does anyone know what it is? It was late and I have not taken anything down to see what it might be. Thanks Roger