Heater not working

I have a 90 Cav. with 140,000, the fan works but I get no warm air unless the car has been running awhile. I assume that's from the warm engine. When it is very cold out I get no warm air.
I also have a major water leak coming from somewhere. It runs down the rear behind the back seat and pools behind the back seat on the passenger side. I've already spent 300 and 2 people trying to find the leak. Any one have any suggestions on either or both problems.

thanks
Donna

Heater core is leaking under the the passenger side dashboard... probably needs to be replaced.

yea had that problem on my old sunbird, but i trashed it :Q

I don't have to worry about a water leak or no heat any more. Some one hit me last Monday and totaled the car.

doh, hope you were covered