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    scbrown65's Avatar
    scbrown65 Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Oct 5, 2013, 12:08 PM
    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?
    TxGreaseMonkey's Avatar
    TxGreaseMonkey Posts: 16,761, Reputation: 5597
    Uber Member
    		  
    #2

    Oct 5, 2013, 12:34 PM
    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.
    hernandezv86's Avatar
    hernandezv86 Posts: 13, Reputation: 1
    New Member
    		  
    #3

    Oct 5, 2013, 12:34 PM
    Sounds to me like the impeller on the water pump is turning the wrong way, not circulating the coolant
    odinn7's Avatar
    odinn7 Posts: 7,691, Reputation: 1547
    Entomology Expert
    		  
    #4

    Oct 5, 2013, 04:08 PM
    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.
    TxGreaseMonkey's Avatar
    TxGreaseMonkey Posts: 16,761, Reputation: 5597
    Uber Member
    		  
    #5

    Oct 5, 2013, 04:59 PM
    Did you install the thermostat correctly? Was it an OEM thermostat?
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