I haven't been driving the car much the last two months. Yesterday when I moved my car (had some yard work done and had to move cars around), I noticed a sloshing/wooshing sound whenever I would hit the gas.

It was only when I was parked and not in gear. Once the car warmed up, it stopped.

I looked on line and it seemed to indicate there was air in the system. So I started the car up, took the cap off the reservoir, and let the car run for about 30 minutes (in theory to burp the system). I did notice some air bubbles coming up, but nothing out the ordinary.

I figured I was done with the issue. However today when I moved the car, it still made the noise.

The noise seems to come from the middle of the dashboard.

I do seem to have a super slow leak in the system, but super super slow.


Could it be the heater core? Maybe the hoses from the eater core that go back to the engine?
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1985 245. 246K Gone..but not forgotten. Sold in 2013, found 2018! Still running on the road. Of course. 1993 Volvo 850 soon to be gone