We have mazda mpv 2000....it was overheating and we kept loosing coolant. We changed the thermostat. The van at first was running hot still...but now it is not running hot but we are losing coolant...please help! !
Check the water pump and the heater core
SOURCE: 3 liter mazda mpv overheating
You probably never cleaned the cooling system out.
If you have not get it done by pros.
It seems something is blocking the flow. If the water pump went bad you will know. Rarely ever heard a impeller breaks off like you think. The bearings and the seal break first.
Check and see also if the heater valve is working.
As for the over heating even new thermostats fail. Reverse flush is needed or the procan measure the pressure in the radiator cooling system and edetermine if there is a engine pressure problem. Tools and experience is the key in the game of diagnosis.
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