Leaking water pump... But not at weep hole.

You've already got it off do yourself a favor and just put a new one on and then you'll know what you've got! It's cheap insurance and peace of mind!

Absolutely!!

If that is the original water pump its over 50 years old! Its served its time, get a new one while everything is apart and enjoy your trip to Carlisle, not worrying if that old pump is about to fail at any time!