Solution to my leaking water pump weep hole?
Plug the weep hole with a foam earplug and see if it still leaks on the floor. (After cleaning the suspect area)
That leak could be coming from any of the other areas you described, and just appears to be coming from the weep hole.
That anti-freeze can run down, and you can't see the source.
I use a product for these annoying little leaks when it's not worth it to tear it down to try to find the source of the problem.
Saved me from having to put a head gasket in a farm tractor going on 20 years now, still no leaks.
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