03 WRX overheating
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This is a discussion on 03 WRX overheating within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; Hey all! I've been dealing with this issue for a while now. My 03 WRX has been overheating, but only ...

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    Registered User dbswagon's Avatar
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    03 WRX overheating

    Hey all! I've been dealing with this issue for a while now. My 03 WRX has been overheating, but only after driving for at least an hour (freeway) and then when I exit and drive in traffic lights the temp starts going up. Turning the heater on helps. It all started a year and a half ago during a track day at Laguna Seca. The car didn't have quite enough coolant when I noticed it overheating (fully in red). After I added more coolant it seemed fine but now continues to overheat during slow driving on long drives. I have thought of water pump and thermostat but I believe both would cause the car to overheat faster. Also I guess I should disclose that I have catless turbo back and stage II COBB tuning as far as power mods. Thanks in advance for any help!!

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    He simply abides. SD_GR's Avatar
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    03 WRX overheating

    Check for circulation. If faulty or low find and fix obstruction. Check water pump for visible weeping. Pressure test system. Check fans for function.
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    Subaru Newb MainFrame's Avatar
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    Quote Originally Posted by SD_GR View Post
    Check for circulation. If faulty or low find and fix obstruction. Check water pump for visible weeping. Pressure test system. Check fans for function.

    ^this.. and make sure it's completely burped, just a little air in the system can cause problems. Honestly, I'm surprised it's still working this long after overheating.. most ej heads seem to warp really easily with just one overheat, then you end up having head gasket problems and eventually the engine gives out.

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    Registered User dbswagon's Avatar
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    Thanks for the respones!! Gonna give these a go and see what happens. The car hasn't overheated after a recent drive from bay area to Sacramento and back. Seems kind of random, so tough to diagnose. Btw when it first happened someone guessed at blown headgasket...

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