This one has me stumped.Ĭlick to expand.Good point on the extra hot air when initially warmed up. Not a project I need on my list at the moment. I really hope I don't have to do the head gasket. The car started to get hot one time in heavy traffic, and I pulled over and let it cool down. And I can't come up with an explanation as to how combustion gas could get into the cooling system without also pulling coolant into the combustion chamber, resulting in loss of coolant. Though, I have never once had to top off the coolant over several thousand miles of driving with this issue (hearing water in the dash). I did the coolant combustion gas check with the blue liquid, and it didn't change color, suggesting it's no combustion gas in there (though I don't fully trust that little thing, it's kind of a lame setup that's hard to capture bubbles with, and very easy to suck coolant into, which means you have to start over. I have the front of the car up on ramps every time I've done it. I kept going and going but it just doesn't seem to change, so there's no "going until bubbles stop coming up". Then when idling it's a slow smallish burp every minute or two. Every time I rev it a pretty huge amount of air bubbles up through the radiator. And I'm now convinced running it is just pushing air into the system. I reved it like this dozens and dozens of times. I just did it once more, and really laid into with the revs up to 4k to push anything through. I bought the EPAuto spill proof funnel system, and have bled it seemingly thoroughly 4 times now. All of these changes in heater core temp are going on while the engine coolant temp is a steady 93 C going down the highway. Another symptom is that at first once warmed up the air is HOT, even when set to the low 60's on the temp setting, but then after 15-30 minutes of driving down the highway the air gradually cools down until you have to set it on the higher end to feel a lot of heat. Over the past couple of weeks I've been trying to get the air out of the cooling system that I can hear in the dash/heater core when it's cold. Hi, new to Subaru as of a few months ago (2011 Outback 2.5i Limited).
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