ok, this baffles me...my radiator is losing water somehow but idk where it's comming form...i've already checked all the hoses, none of those leak. There's never a puddle of water anywhere after it sits for a while. Could it be the cap maybe???

 

weep hole in water pump?

 

Check to see if your reservoir is cracked or your overflow tube{rubber} has a hole in it.I live where it gets cold in the winter and have both happer to people I know.