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Author: Subject: 5efe swap overheating issue!!
ma_audio_tercel
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icon_help.gif posted on 19-6-2016 at 08:14 PM
5efe swap overheating issue!!


I have a 1992 tercel with a 5efe. Running off the 92 harness and ecu. I can't seem to figure why its over heating because everything is brand new. Upper and lower rad hoses stay soft. Radiator fan does not kick on until after its way too hot. Relay is new as well. I still have the original cluster and I'm hoping I can't still use that for the Guages. If anyone has any ideas it would be much appreciated
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mulberry
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[*] posted on 19-6-2016 at 08:20 PM


Did you try to unplug the fan relay to see if the fan runs constantly at the turn of the key? Does the radiator have plastic tanks? If yes and the color of the top tank has changed from black to brown the radiator maybe clogged and needs to be changed. Is the radiator cap new? Does the radiator fill the overflow bottle when the car runs hot?
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ma_audio_tercel
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[*] posted on 19-6-2016 at 08:32 PM


Yes when I unplug the switch it turns on. The radiator is brand new same with everything else. I had the same issue with the first 5efe engine I swapped. Hoping I would fix the issues I replace every cooling part in the system.
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estabon23
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[*] posted on 20-6-2016 at 11:58 PM


mine was overheating recently, turned out to be thermostat...
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mulberry
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[*] posted on 21-6-2016 at 06:08 PM


Quote: Originally posted by estabon23  
mine was overheating recently, turned out to be thermostat...



Oops! I forgot about the thermostat!
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ma_audio_tercel
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[*] posted on 22-6-2016 at 08:36 AM


I wish is was that simple. Unless this brand new Murray thermostat I got from autozone is faulty..
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estabon23
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[*] posted on 22-6-2016 at 09:02 PM


how is the water pump...?
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ma_audio_tercel
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[*] posted on 24-6-2016 at 12:56 AM


I assume the water pump is fine? It doesn't leak. I learned if I plug in the fan relay only using the 2 parallel prongs the fan kicks on so in other words I install the relay half way in at an angle. Also for the fan switch, is there a certain one I should be using? They come in white and brown. I happen to have both.
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titaniumADRIAN
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[*] posted on 24-6-2016 at 04:16 AM


how did you confirm the engine is over heating?
because if everything is new and the fan does come on, maybe its not over heating and you just have a faulty gauge(or sender) that reads hotter than what it really is
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ma_audio_tercel
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[*] posted on 25-6-2016 at 09:33 AM


Good question. The sender is new but maybe there is a certain sender I should be using? I've just been seeing the temp spike through my cluster from the 92 tercel.
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[*] posted on 27-6-2016 at 11:53 AM


Quote: Originally posted by ma_audio_tercel  
Good question. The sender is new but maybe there is a certain sender I should be using? I've just been seeing the temp spike through my cluster from the 92 tercel.



Two ways to find out for sure get a mechanical temperature gauge or one of those temperature guns with the LED readout
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