Question about 1991 Acura Legend

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Car Overheats after 12 to 15 minutes of running. Temperature decreaes when I accelerate.

1993 Acura Legend with 160K miles is overheating after 12 to 15 minutes of running. When I accelerate the temperature gauge goes back to normal. When it idles, it runs 3/4 of the way to red. Replaced thermostat and reservoir. When it starts to overheat, hot coolant is flowing into the reservoir. When I turn the car off and let it cool down, the coolant flows back into the radiator. Car doesn't smoke and drives perfectly with no engine noise. Is this the coolant temperature sensor or something else?? THANKS

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  • myron_jones Apr 24, 2009

    Thanks for your response. Yes, both fans work and seem to be spinning at normal speed. I suspected it could be a water pump, which I was hoping it wasn't because they are supposedly difficult to get to and expensive to replace on Legends.

  • VWdan
    VWdan May 11, 2010

    sounds like a weak water pump. does the cooling fan ever go on?

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Your fan is the problem...it's not turning fast enough to cool the engine off. I need more info on what type of fan you have....elec fan or a clutch fan?

Posted on Apr 24, 2009

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I have fought this problem for several years! Initially I had a radiator problem. The OEM radiator top is plastic and it cracked. I replaced it with an aftermarket radiator that was all metal (with a metal top). The problem surfaced again, and it turned out that my oil was slightly low. I needed to ensure that both radiator fluid and oil were topped off, which has solved the problem. (I also changed out radiator cap and thermostadt, which didn't affect the problem.)

Posted on Jul 23, 2009

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1. You need to replace your radiator cap. 2. You might have air trapped in your cooling system...which is causing your fans not to turn on when they should. I had the same problem on my 93 Integra.

Posted on Jul 07, 2009

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1 Answer

Overheating


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1991 acura legend idles fine forever but driven for a short distance overheats and overflows coolant tank, also noticed the fans don't go on. thermostat has been replaced.


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Help!


Well, an old hose can bust for several reasons. Would assume that the temperature change from driving raised pressure enough that a weakened portion finally broke. As for the fans, check fuses and connections, then verify voltage going to the fan. If there is voltage and it is still not working, you have a bad fan.

Jul 22, 2008 | 1993 Acura Legend

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1992 acura legend very weird problems


This particular model suffers with head gasket problems. I have had to replace head gaskets on several of these vehicles to solve the overheating problem. The two cylinders in the rear of the engine are the problematic ones. The head gasket goes bad in that area which sends combustion gas into the cooling system. This then creates air pockets which in turn causes the engine to run hot. The air pockets then shift and as water starts to circulate again, the temperature goes back down. This cycle repeats over and over.
Solution is to replace the head gaskets.

May 24, 2008 | 1992 Acura Legend

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