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My car recently started over heating so I replaced the thermostat yesterday and drove it around. It was fine till today it started over heating again but once I stepped on the gas all the way and let of it would go back to normal temp. I looked under the hood and found radiator fluid splattered on the hood and battery but can find no leaks. What could be the problem?

 
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Head Gasket

Click this and read:
https://www.civicforums.com/forums/3...reference.html

 
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Thanks Collin I looked at the link and it sounds exactly like the problem I'm having

 
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Fluid was forced out of the overflow bottle.

Needs a head gasket job.

 
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i thought we were going to a set a new record for overheating/head gasket threads,

its been how long now?.....a whole week since one has been started?

 
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Are you sure that your radiator is still okay? I had some major overheating issues too and ended up with radiator fluid all over the engine. See this:

https://www.civicforums.com/forums/1...erheating.html

The initial cause ended up being a busted radiator. While the car was at idle, everything seemed just fine. I thought the radiator was okay. After continually losing fluid, I figured I was missing something. So, I pressure tested the cooling system and it was leaking like crazy. The leak was at the seam of the plastic and metal, so it was very difficult to see. I would hate for you to replace the head gasket only to overheat again and end up having to replace it again.

To pressure test the system, I did the loaner tool program from Advance Auto. You can buy the Powerbuilt Tools Cooling System Pressure Kit (22 Piece) #940427 and then return it for a full refund when you are done.

I am not sure if others agree with taking this step. But, it is free and it takes all of about 15 minutes to do. So, I figure it cannot hurt.

 
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Okay guys here's a new update it turned out to be just the hose clamps that needed to be replaced. I since then replaced them all and it hasn't over heated since. I guess I got lucky?

 
Rep Power: 518

So there WAS a leak?


Drive it several hundred miles and keep an eye on what the fluid level in the plastic reservoir does, before you say it's all good!

 
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UPDATE: it no longer over heats I had to replace the cooling fan sensor but now I have a different problem. When the car is in park it idles rough I took it to get checked but no codes came up for misfiring. I replaced all spark plugs and that didn't seem to help. What else can I try to resolve this problem?

 
Rep Power: 518

What are you calling rough?
Lopes? Misses? Vibrates? Noises?

What did the mechanic say about the "idles rough"?

What codes does it have?

 
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Has no codes at all and the car vibrates roughly.

 
Rep Power: 518

What did the mechanic say about it? He's the one who had the opportunity to experience the problem in person.



I can only guess at things from my recliner. Motor mount(s)?