coolant coming out around a tube that supplies the heater core (told its the water pump just don't see how)
The supply and return heater hoses have an O ring below the clamp that holds them in place directly off the casting above and to the left of the water-pump. Now please listen to this: The actual aluminum water-pump is secured buy small metric hex nuts behind the water-pump pulley. Your water-pump may have a leaking gasket where it bolts to an aluminum distribution housing. Wish I could actually see the leak! Any more specific questions don't be afraid to E-mail.
That tube is part of the water pump housing. Essentially the water pump. You may be able to get the leak fixed but if it's that old just go ahead and replace the pump.
it could be a bad water pump or a hose split at the connection or a loose clamp on the hose
