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    overheating problem..help please.

    my wifes isuzu trooper 1995 has been overheating recently, new radiator new thermostat and new fan clutch and it still overheats? any ideas where to look next?







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    Re: overheating problem..help please.

    have you checked the water pump?

    im not sure about isuzu but i know audi's have more than one water pump, they have an internal water pump located some where the average person can't find...i sure the hell couldn't



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    Re: overheating problem..help please.

    I replaced the water pump, all hoses, thermostat, fan clutch (heavy duty), thermostat housing and mine still overheats from time to time.... how many miles are on it?




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    Re: overheating problem..help please.

    how many miles? possibly a head gasket going




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    Re: overheating problem..help please.

    about 135,000




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    Re: overheating problem..help please.

    Possibly a head gasket since its got a few miles on it. I mean dont jump to any conclusions lol but does it happen after being ran for a little while or just right away some times?




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    Re: overheating problem..help please.

    take it to a mechanic! I always spend 100's on my own repairs only to miss the problem completely



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    Re: overheating problem..help please.

    One thing you could do is test your coolant. I dont mean to see if it is protecting to certain temps. With there being two dissimilar metals and a chemical present all in the same place your coolant will actually produce voltage (same concept as a battery). You check this by taking a volt meter and placing the positive lead in the coolant and the negative lead on the negative terminal of the battery. If you have .2 volts or less you are good. If you are around .5 volts you are border line. If you are .7 volts or higher your coolant is bad and you need to get it flushed. If you are reading around the .7 range the coolant gets corrosive and it can eat away at parts in the engine such as the water pump. I have seen people pull out a water pump and the impeller was gone because the coolant was around the .7 or higher range. Just a thought.




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    Re: overheating problem..help please.

    ^^^ Good advice... maybe get a lower temp thermo??? What temp is the one you have now?




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    Re: overheating problem..help please.

    Quote Originally Posted by mike75356
    Possibly a head gasket since its got a few miles on it. I mean dont jump to any conclusions lol but does it happen after being ran for a little while or just right away some times?
    Could be it, but wouldn't it leak if it was the head gasket?




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    Re: overheating problem..help please.

    flush the radiator and make sure that it is topped off. after that, rebuild the pump or get a new one. then check the hoses for possible build up.




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    Re: overheating problem..help please.

    thanks all, water pump seemed to be working ok but i guess ill change it and see, coolant is new, and it overheats after driving for a 20 mins + or - a few.thanks 4 your help




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    Re: overheating problem..help please.

    Oh yeah I totally forgot about this one... you might have an air pocket in your coolant, you need to make sure the thermo opens when your adding coolant in it, the air pocket prevents the thermo from opening




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    Re: overheating problem..help please.

    Quote Originally Posted by 94bronco58
    Oh yeah I totally forgot about this one... you might have an air pocket in your coolant, you need to make sure the thermo opens when your adding coolant in it, the air pocket prevents the thermo from opening
    possible but not likely. if you end up changing the coolant though, then you would need to burp the system and lines.




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    Re: overheating problem..help please.

    Quick ??..how many core is your radiator?



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