How long will cheap oil transfer pump survive pumping water?

Folks'll get a kick out you stopping, kid or? dunking bucket into trailer tank, running up and pouring in rad.
Leave the cap off, no pressure, less coolant loss, maybe just perch an old funnel in top, pour water in rad.
Probably be a big hit,
Sounds like fun,
Good luck.
(Marine pump is submersible, won't lose prime,
Go borrow neighbors bass boat pump .)