2000 Mazda MPV Repair Question
Mazda MPV Heater Problem
Both are in the same system, fixing one is not going to work.
I would suggest fixing the radiator first. Test and ensure that it is the heater core that is leaking and the water is not from other sources. Once it is confirmed, that the heater core is leaking, disconnect the heater core hoses and plug them to disable the heater for the time being.
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