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Old 10 Jan 2011, 10:16 pm
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Default 04 Civic heater problems.?

I noticed a small drip from the overflow tank for the engine coolant. Now it takes forever to heat the car. The engine temp will rise to an abnormal temp and then the heater will blow hot air and the engine temp goes down. It just started doing this today. There is plenty of engine coolant so i thought a line to the heating core may be loose but just when i thought the heat wouldn't work it kicked on. This is the first Honda I've ever had so I'm having a bit more trouble diagnosing the problem. What could this be? Hopefully it isn't expensive.
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Old 10 Jan 2011, 10:31 pm
bkg bkg is offline
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Usually when a car takes a long time to come up to operating temp, it is caused by the coolant thermostat being stuck in the open position. The water is constantly circulating through the engine block instead of being held in the block until it comes up to temp. They are pretty cheap parts and should be relatively easy to change. It is usually located in the water neck where the radiator hose meets the engine.
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Old 10 Jan 2011, 10:46 pm
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Change the thermostat probably sticking either closed or open would be the first inexpensive thing that it could be
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