1995 Daewoo Lanos Water leaks from heater

Your heater core is the culprit here. It is located inside of dash, however you can bypass the hoses from under the hood near the firewall. There will be two hoses leading to the heater core through the firewall under hood. Disconnect the two hoses from the heater core on the firewall and join them together with another hose. They are not always the same size hoses so just keep in mind reducer fittings. Also recommend using hose clamps. Just don't forget about the heater core bypass if you have cold season in your location.

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