Joe here from Orlando

I removed the water pump from my 1994 530i today. I was warned not to remove the long aluminum tubes. Well the smaller aluminum tube came out accidently. I can see the hole that the aluminum tube fits in. Do I just push it back into place or do I replace the O-ring at the very front of the engine near the firewall? Is it possible to place silcone around the end of the aluminum tube to ensure it seals or do I have to go through a mountain of problems to replace the aluminum tube and the O-ring? Have anyone run into this problem before?

Another thing I had to take the fan out with the water pump because I didn't have a 32mm wrench. How do I remove the fan since I already remove the fan from the belt?