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Old 22 Dec 2012, 02:04 pm
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Posts: 302
Default my civic overheats in idle after long drives?

i noticed when i drove to work yesterday i was kind of punching it and it was heating up on idle , but when i take off it goes back down??? i also noticed when i take long drives it starts to heat up as well, and like every other day i have to fill my water resivoir because its empty

i see no sign of leaks????
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Old 22 Dec 2012, 02:17 pm
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You have a leak genius.
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Old 22 Dec 2012, 02:31 pm
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Posts: 343

You can end up with the wrong distilled water and anti-freeze mixtures that can cause you to end up adding to the reservoir a lot.I'd suggest that you get a anti-freeze tester for 7-12 bucks from walmart etc and read it instructions carefully before you proceed.One thing you want is the engine totally cooled down , allow the hot engine to sit for 2-4 hrs then remove the reservoir cap.Use the tester to find out what quality and mixture the coolant is good to.For example here in Canada where I live you'd want it good for about -40C temperatures in the winter.Normally it should be a 50-50 mixture or 60% anti-freeze if extreme cold temperatures exist in your area etc.You may want to buy some anti-freeze and some pre-mixed coolant also this way it you need to add anti-freeze you can add some 100% anti-freeze until you get the 50-50 mixtures right then later if needed use the pre-mixed 50-50 jug.

Once you know the coolant is up to par and of good quality start up the engine and let it run but take notice to where the temperature gauge is at , once the engine warms up sitting idling a awhile you should then hear or see the low fan system engage.If the fan doesn't engage by the time the gauge gets close to half way the fan motor or fan motor fuse or fan motor relay or its wiring or a bad ground may exist. Also once the temperature gets up around or slightly above half way or if you turn on a functioning properly A/C system the hi fan system should engage , this will be either one or two fans coming on at higher speeds.Now if that hi fan system isn't working check what I mentioned plus check the coolant temperature sensor.

Hope that helps and best of luck.By the way if the coolant is old or dirty or is mixed wrong or even if the thermostat is sticking all these issues can cause over heating issues.Note if it's over heating when at hwy speeds too this might be a sign that the water pump is faulty.
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Old 22 Dec 2012, 02:47 pm
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Join Date: Nov 2012
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Let your car idle and Check if your cooling fans come on if not that might be your problem or it could be a defective ect sensor
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