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Old 23 Nov 2009, 05:01 am
Dee Dee is offline
Join Date: Aug 2007
Posts: 32
Default my 00 civic over heats ideling?

I noticed my 00 civic ex for some random reason keeps over heating when its ideling. I checked the water pumps and thermostat and its fine. i recently did a full tune up oilchange ect. to but this kept happening for about 4 months now and its starting to bother the crap out of me but its fine when its cold out. I even took it to a shop and they keep saying its the thermostat when i replaced it the first time when i checked it. I also changed my water pump to and my radiator i changed it recently to. This only happens if i let the car sit still for about 15 minutes but the minute i drive it drops back down. Any reason what this happens?
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Old 23 Nov 2009, 05:16 am
Junior Member
Join Date: Nov 2009
Posts: 2

1 is ya thermo fan working

2 you might have a warped head on the engine so take head off get it machined flat and replace head gasket

it will be either ither
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Old 23 Nov 2009, 05:31 am
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Join Date: Aug 2007
Posts: 1,032

Not head gasket, which would be worse when driving. When the engine is overheating, open the hood and see if the radiator fan is running. (To tell the fans apart, turn on the A/C to identify the condenser fan.) I'm sure it is not. When the engine is cold and off, try turning the fan with your fingers (it may run automatically when the engine is hot even with the car turned off, so be careful). If it has a lot of friction it is bad, otherwise suspect the relay first. Both are common trouble areas but the fan is easier to give a basic check.
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Old 23 Nov 2009, 05:46 am
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Join Date: Aug 2009
Posts: 500

Check the following;

1. check your fan if its working properly

2. check your thermostat if its working properly

3. check your radiator if its clog

4. check your belt if loose

Hope this helps!
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Old 23 Nov 2009, 06:01 am
Join Date: Aug 2007
Posts: 56

it could be a faulty fan. Make sure your overflow bottle has water in it as well as your radiator. If it is low on water this can happen where it will overheat after a little while but then just cool down as you start driving since coool air is entering the engine bay also more water would enter the engine.
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