disappearing radiator water

Got new radiator cap, old one was missing part of the rubber. Overflow bottle does not leak. Flushed radiator & heater core, heater core is fine, heater works good, not smelly. A little puff of white smoke & a little water out the tail pipe. Haven't started it for 2-3 weeks. Started great, ran fine, filled up radiator last night. Today the water was down past the core again. 2 small wet places under car. Still can't see/find where.
Thanks for all the helpful suggestions
Will wait to work on door panel & window after water leak solved.
Autogirl

Well, are the puddles the car makes under the rad, water pump, hoses, or the engine itself? I bet I could find the leak in a few minutes, unless you have to pull a head or something...

If you can't see any leaks, check ypor engine oil for water. If it is foamy, or white on the dipstick, you could have a porous or cracked block, or it could be a head gasket. certainly wish you luck. Park on a nice clean and dry area, let it run for twenty, shut it off and let it sit awhile to see if it is hopefully a small leak you missed.