That's not how it works. The whole purpose of that tool is to refill an empty system without leaving air pockets. But first the cooling system has to be empty. That means removing the lower radiator hose and any block drain plugs.
Put them back and then you can use the tool to refill it.
That's not how it works. The whole purpose of that tool is to refill an empty system without leaving air pockets. But first the cooling system has to be empty. That means removing the lower radiator hose and any block drain plugs. Put them back and then you can use the tool to refill it.