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