Minor amount of coolant on passenger floorboards ('68 cuda, '94 360 mag)

magnumdart said
It is leaking from somewhere. It wont fix itself. Any chance the new core was damaged during replacement?

It was fine all last year and the year before, it's about 2 years old.

I noticed the small fluid after leaving for home, and there was no more on the ride home or at home, when I ran it in the driveway checking for leaks.

I was hoping someone would say "known to happen after winter" or something reassuring like that.

Dammit.