[brcidd]

Of course- you are fine- just be glad it wasn't hot weather....The oldest trick in the book is that when you have a leak in a system- and you have to "get" somewhere- is to loosen the cap, to take pressure off the system, to slow the leak...and make it home--- in the old, old days, there was no pressurized systems, so you just ran like that, probably lost a little coolant due to evaporization, but no big deal.