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Coolant getting stuck in resevoir tank

Old 16-May-2006, 05:21 PM
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Coolant getting stuck in resevoir tank

Hey guys, ive been having some overheating problems. Radiator fluid looks clean, I keep having to top it off every week because when the car gets warm it fills up the resevoir tank way past MAX (like 2 cm under the cap). When i let the car cool, it doesn't go back into the radiator so hence my car keeps overheating when i drive for over 45 minutes.

No leaks, rad in good condition, therostat replaced recently, no white smoke or smell, bled coolant. My previous civic blew its head casket so i checkd all those symptoms none present

Anyone come across the same problem?, or any suggestions?

I was thinking it would be the pressure sensor in the thermostat housing. Or am i totally off? Did a search, couldn't find anything on it.

any input would be greatly appreciated
Thank You!
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Old 16-May-2006, 05:24 PM
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prolly just need a new rad cap
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Old 16-May-2006, 09:28 PM
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rad cap and it also could be the way you filled the coolant in the first place.
did u fill up the radiator and fill up the resevoir aswell?
cuz thats wrong.
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Old 16-May-2006, 09:29 PM
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^^
Generally, a full resevoir with low coolant in the rad means a new cap is needed.

You MAY have to get one from the dealer.
My cousin had the same prob and couldn't find a proper cap anywhere. (maybe he didn't look hard enough)
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Old 16-May-2006, 09:56 PM
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I wouldn't go to c/t or napa for a rad cap anways.
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Old 16-May-2006, 10:03 PM
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yeah it's such a cheap part, just get the dealer one
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Old 17-May-2006, 02:44 AM
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stant caps are NipponDenso anyways...well atleast the ones I have ever bought
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Old 31-May-2006, 02:21 PM
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still overheating

hey guys, i replaced the rad cap, still the same. checked inside the rad and found some smallrubber peices inside. Just changed the entire radiator and all the hoses and flushed the system. Car is stil overheating, fan seems to only come on when it starts overheating and not when it reaches a certain temp. any ideas?

The resevoir tank keeps filling up to the top then starts squirting out once in a while and the coolant doesn't travel back into the rad when the car cools off.. dunno what else to try. was thinking of thermostat just for the heck of it. what else am i missing?
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Old 31-May-2006, 02:32 PM
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are you losing any coolant or burning any?

that's a tough one. How old is your water pump?
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Old 31-May-2006, 02:59 PM
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im not burning coolant or losing coolant at all, cuz when i pour the coolant from the resevoir back into the rad , it tops off completely. waterpump seems to be working, all my hoses get hot. last changed around 90,000km ago.

How do u tell if ur thermostat is not working without having to open it up?

and how bad is it to operate the car when the gauge 3/4's up. Hasn't gone any higher. Been driving like this for about a month already.

are there any sensors that affect the fan or coolent flow or pressure that could be changed? couldn' find any in the hanes manual.
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Old 01-Jun-2006, 12:52 AM
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Try this. Disconnect the wire from your thermostat housing and loop the plug. This will run the fan continuosly. Also I reccomend a colder thermostat. Jackson racing makes a 160 degree thermostat for a good price. If this doesn't work then I think it's a headgasket prob.
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Old 01-Jun-2006, 03:07 AM
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loop the thermostat wire like rick stated and this will tell u if the thermostat is bad or not by letting the fan run continiously i dont see it needing a racing thermostat cuz its a stock motor
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