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Old 05-20-2013, 01:17 PM   #1
Mowin8603
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Default Turbo coolant reservoir low causing motor to run hot..?

I have done some searching and have yet to find anything helpful. I recently had my motor rebuilt in my 2007 STi and since I got the car back it runs fine until you drive it for a few miles and it starts to get hot (210* - 240*F). I have learned that the coolant reservior by the turbo gets low and once I add coolant to it, the car goes back to running at 180* - 207*F consistantly. Could something not be hooked up properly? There are 2 lines running from the radiator to the reservior and then a line from the turbo reservior to the turbo. Thats all I can see from the top side as I have yet to take anything apart. The fans initially kick on at 204*F. So far the rebuilt motor has 450 miles on it and the temperatures I am reading are from my AccessPort. Any ideas?
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Old 05-20-2013, 01:53 PM   #2
tuzzio
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It's entirely possible you have a coolant leak. Lets hope after a rebuild its not a bad head gasket.

Check the lines feeding into the turbo, they're known for it.
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Old 05-20-2013, 07:38 PM   #3
willyb524
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I also have this problem but the radiator itself gets low then the temperature gets close to redline for a minute then drops to normal, then a few minutes later it does the same thing. i use about a gallon of water in my radiator every few days now.
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Old 05-21-2013, 07:50 AM   #4
Mowin8603
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Well after doing some more searching it's hard not to think my heads have lifted. The car is at my local Subaru dealership now so we will see what they find.
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Old 05-21-2013, 09:09 AM   #5
Fir3Fighter
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Sounds like a leak somewhere, hopefully not the HG like Tuzzio said^… I'm sure the dealership will find it, hopefully it isn't anything bad! Good luck!
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Old 05-21-2013, 05:14 PM   #6
jaxscuby
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did you burp the coolant system?
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Old 05-21-2013, 05:52 PM   #7
Sypher
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Quote:
Originally Posted by Mowin8603 View Post
I have done some searching and have yet to find anything helpful. I recently had my motor rebuilt in my 2007 STi and since I got the car back it runs fine until you drive it for a few miles and it starts to get hot (210* - 240*F). I have learned that the coolant reservior by the turbo gets low and once I add coolant to it, the car goes back to running at 180* - 207*F consistantly. Could something not be hooked up properly? There are 2 lines running from the radiator to the reservior and then a line from the turbo reservior to the turbo. Thats all I can see from the top side as I have yet to take anything apart. The fans initially kick on at 204*F. So far the rebuilt motor has 450 miles on it and the temperatures I am reading are from my AccessPort. Any ideas?
The two hoses that go to the top reservoir can easily be switched around, if your car runs hot after a drive BUT goes cool while your idling then its a good possibility thats the problem. jsut to test switch them and see if it changes anything (HOWEVER) be warned it will heat up and it will not stop so just drive around the block you will notice really soon.
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Old 05-21-2013, 05:54 PM   #8
Sypher
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And Im abit lost with how you explained the hoses, now my information is coming from owning a 06 wrx. The Top reservoir by the turbo has a bottom hose and a top hose thats connected to the turbo.
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