Yes it can.
But be very careful not to let the other half drop into the radiator. Take the hose off behind the elbo and put something in there to catch all the little bits that come falling out. Believe me do this I did not and I had to take the radiator out to get the bits out.
Oh yea mine is now leaking again, however I do not know if it is the elbow or the hose connecting it. But I need to fix it again.