If this is the wrong place for this, I do apologize, as I am new and easily confused.
I stumbled onto your forums by accident in my quest to find information that I was seeking, and by accident, I found an image that hopefully can explain my troubles.
The image is from this site, and from this thread: vacuum-line-removal-t556957.html
I picked up this 1982 Datsun 720 standard 2wd truck, and it is leaking anti-freeze from up under this manifold looking thing (I don't know what it is called). As near as I have been able to determine, there is some kind of tee connector/plug that is threaded into the underside of this unit, and it splits to the right and connects to the "y" off of the gooseneck from the water pump to the radiator.
The other part of the threaded tee is connected to what I believe is the heater hose that goes off to the left and into the firewall.
I've no idea as to what is leaking, be it the threaded fitting, or a hole in the hose, bu me being unable to tell the parts guys and girls what it is called, they cannot help me over the phone, and before I go and try to remove everything, I would like to be able to identify the part(s), so that I can call it in and see if they can order them for me.
Hopefully, someone can help and provide an answer for me.
I thank you in advance for any reply/help.