WRX overheating issues
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This is a discussion on WRX overheating issues within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; Hello all, I'm having some trouble with my subby. It's a WRX wagon 2002 with a ej205 engine, everything stock ...

  1. #1
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    Jun 2014
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    1

    WRX overheating issues

    Hello all,

    I'm having some trouble with my subby.
    It's a WRX wagon 2002 with a ej205 engine, everything stock except for modified exhaust system, walbro pump and adjustable fuel regulator.

    While driving for short periods, car runs fine. But while i'm on a long ride, lets say 30 minutes or longer, and being pretty hard on throttle, car starts overheating and coolant spitting out of reservoir. Then I let the car cool down, fill up the missing coolant, and continue slowly to the destination with no issues.

    Coolant cap looks ok but, rated at 90 kpa (0.9 bar). Now after a little search I find out that the pressure needs to be 108 kpa (1.1bar).

    Do you thing that the low rated cap can cause those issues?

    Any thought/help from you expert about the problem?

    Thanks in advance!

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  3. #2
    Registered User
    Join Date
    Jan 2014
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    phoenix,az
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    36
    4 issues come to mind 1st would be the cap
    2nd would be the thermostat is its just partially opening or going through bypass when not hard throttle pull it out and throw in a pan of boiling water should open at like 190F
    3rd would be that there is an air bubble in the system somewhere
    4th most costly but would be that the radiator is plugged and needs to be replaced look donw the cap and see it there is alot of calcium build up in the tubes AFTER ITS COOLED!!! dont learn the hard way

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