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This is a discussion on More problems!!!! within the New Member Hangout forums, part of the Community - Meet other Enthusiasts category; Ok i am having more problems out of my STI! I have researched it and still cant find an answer. ...

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    More problems!!!!

    Ok i am having more problems out of my STI! I have researched it and still cant find an answer. So I figured id make a post to see if anyone can help me out. I have a 2004 STI and the problem is that it keeps running hot. I have replaced the thermostate and coolant lines. My radiator is staying topped off with coolant. But the canister that holds the coolant for the trubo does not stay full of coolant, and when it does run hot the coolant that is in that canister tends to cook or boil. I also believe that it takes the coolant out of the canister and dumps it in the reservoir that is next to the radiator. I have no idea what this problem is so any help would be much appreciated. Thanks for your time in reading this post!

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    Captain James of the SS Impreza has gone down with the ship Drews's Avatar
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    Does it run hot at idle and then cool down under load?
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    It happens at idle, and normal driving. But when I run the car it never overheats, the temp gauge actually goes down lower than normal which makes sense. But everytime it has started to run hot i have pulled over and the turbo cooler canister i guess thats what its called, is boiling the coolant and its low and the reservoir is overflowing. I have no idea where to start.

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    Quote Originally Posted by Rallybluewrxsti View Post
    It happens at idle, and normal driving. But when I run the car it never overheats, the temp gauge actually goes down lower than normal which makes sense. But everytime it has started to run hot i have pulled over and the turbo cooler canister i guess thats what its called, is boiling the coolant and its low and the reservoir is overflowing. I have no idea where to start.
    Radiator cap. If the coolant is boiling out of the system and into the reservior, I would start there and have it pressure tested
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    My car has a koyo radiator do you think its the radiator cap or that canister cap that is the problem? Ill try both and hope for the best. I have tried everything except a new water pump and the caps. I really hope this fixes it. Thanks for the info ill keep everyone posted!

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    When did the problem start?
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    It happend fairly recently. The car has 105,000 miles on it so some problems are expected to arise at this point but this one i just really bugging me. I talked to the subaru dealership and they told me that it is a blown head gasket, but if it was a blown head gasket then i would start getting coolant mixed in with my oil, and that is not happening.

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    He simply abides. SD_GR's Avatar
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    So it didn't happen after you did some work on the car?

    If not, replace both caps and while you are burping the system (you are burping the system, right?) make sure you have circulation after the thermostat opens.

    If you have circulation, you have burped the system very well and repeatedly, and if replacing both caps doesn't fix it, the dealership may have a point.
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    No it didnt happen after I did some work to the car. I dont have much mods on the car as it sits right now. But it would make sense that maybe an air pocket got in there somehow. Ill try replacing the caps to see if the problem keeps hapening. But I have one more question: How do you go about burping the system?

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    He simply abides. SD_GR's Avatar
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    Not burping can explain every instance of overheating, except the first one. Here is how to burp (read entire thread):
    Subaru Overheating!!!!!!
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    Registered User jd92677's Avatar
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    Quote Originally Posted by Rallybluewrxsti View Post
    I talked to the subaru dealership and they told me that it is a blown head gasket, but if it was a blown head gasket then i would start getting coolant mixed in with my oil, and that is not happening.
    This is not always the case. It could be blowing compression into the cooling system. You can check that with a block tester quite easily
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    Well guys i really appreciate all the info! I just ordered a new cap, and it will be here on Friday. So im going to try burping the system and the new cap and see how it works. Hopefully my problem will fixed. Ill keep everyone posted. Thanks again guys!

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    You ever think it might be the radiator
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    Registered User starkall's Avatar
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    I've had similar probs with turbo cars. Make sure the turbine shaft on the turbo has no play in it showing signs of a blown turbo being the turbo is water cooled it could be getting hot due to being worn.

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