Went back to the garage that replaced the radiator and the guy who owns
the place took a pair of pliers and twisted the drain cock tight and no
leaks. Told me to watch it for leaks. Am buying and carrying a
replacement cock and a gallong of coolant and a gallon of water.

Had this same thing happen on another honda radiator which I replaced -
someone said this is a common problem so watch for leaks around the
drain cock when you have a radiator worked on or replaced.