Weird cooling issue---resolved
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This is a discussion on Weird cooling issue---resolved within the New Member Hangout forums, part of the Community - Meet other Enthusiasts category; For any one in the future who may have a weird cooling issue. My 2004 WRX cooling issue. I pulled ...

  1. #1
    Registered User Array's Avatar
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    Weird cooling issue---resolved

    For any one in the future who may have a weird cooling issue.
    My 2004 WRX cooling issue. I pulled the engine to do a ton of work, put it back in and ended up with a cooling issue. The coolant flowed, heater worked great, thermostat and pump worked great (all new) did not over heat, but the pressure would build up in the top and bottom radiator hoses (silicone) to the point were I thought they were going to burst. At this point the bottom hose would have so much pressure built up that it would leak, not a big leak but enough to smoke off the headers. I burped the system a few times to no avail. A mechanic buddy of mine told me to jack the front end up as high as I could and try burping it again (tires were off the ground about 4-6 inches) and whala! FIXED! I guess some cars may hold a small air pocket in the system that may not come out on a level burp? Or just the 3rd times a charm? Anyway this drove me nuts so I thought I would put it on here for the small few who may run into this situation.

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  3. #2
    Registered User nsibanez's Avatar
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    Thanks for that write up, I'm going to give this a try as well. I'm having a weird problem where the car will be warming up and at operating temperature but the heat comes out cool for a while and eventually after being at operating temp eventually gets hot. I'm also going to throw a thermostat at it as well because after burping on level ground yesterday the heat works better (still some bubbles in system though...) but once I tried to turn the heat cooler it stayed hot even when I was about a notch away from as cold as it would go. Only when you turn the dial to the coldest setting it would finally cool off.

  4. #3
    Registered User Array's Avatar
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    Yeah I would give it a try. It sounds pretty similar to the problem I was having. I would burp it a few more times and maybe put the front end up on a jack and try that too. Hope everything goes well

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