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1999 buick century leak under the car only when heater is running I replaced the water pump already?
You may have a leak in the heater core. The Heater core is located inside of the car in a box (usually on the passenger side) The leak may be coming from the heater core, and down thru the drain hose (same hose for a/c condensation drainage). If its on the passenger side and its coolant that might be it. The easiest way to check is to use a pressure tester. With a COLD ENGINE I repeat COLD ENGINE you pressurize the cooling system (approx 12 to 14 PSI) and then look for leaks. Hope this helps.
What else can I help you with?
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replace heater core on 92 buick century
