Volks,
bleeding my coolant today, and pull the grill to accss the radiator bleed screw and discover a 13mm bolt head in its place.  

Is this the correct setup?  It seems that there should be something that I could turn by hand..............I had to take to bolt out to get out the air and once that happened there was Mt Visuvius of coolant...kinda like trying to cap a well...........