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-   -   After replaced water pump and thermostat truck overheats why? (https://www.askmehelpdesk.com/showthread.php?t=770071)

  • Oct 5, 2013, 12:08 PM
    scbrown65
    After replaced water pump and thermostat truck overheats why?
    I already replace the water pump, bypass hose and thermostat but the 2000 mercury mountaineer still is overheating why?
  • Oct 5, 2013, 12:34 PM
    TxGreaseMonkey
    You may need to replace the radiator, due to mineral build-up blocking the passages. Replace the radiator and refill with a 50/50 mixture of antifreeze and distilled water; otherwise, buy premix.
  • Oct 5, 2013, 12:34 PM
    hernandezv86
    Sounds to me like the impeller on the water pump is turning the wrong way, not circulating the coolant
  • Oct 5, 2013, 04:08 PM
    odinn7
    Was it over heating before you did this work? It could be the radiator is bad or you could have a bad head gasket even.
  • Oct 5, 2013, 04:59 PM
    TxGreaseMonkey
    Did you install the thermostat correctly? Was it an OEM thermostat?

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