Are sure its rain water and not from a/c drain being clogged up or even anti freeze from heater core ......???
Do you have to add coolant very often ?
If not water leaks can be tricky ...have someone hold a hose over where you think its leaking while you are in car and watch for leak ......trace it to where leak is and seal .......can be a pain to find with having to remove interior things
bg
November 2005