Hi ! What is this about ? Md-2 55 engine
			
			
			
				Seems to be the shut off cock for cooling water, same as on my d2-75. See screenshot  of EPC 
			
			
			
				OK but any clue what is it for?
			
			
			
				Looks like it is for draining the heat exchanger.
			
			
			
				Thank you all ! I don't like to be completely on the dark with my engine comportments!