after car not running for a couple of days, coolant level was at "low". I thought there was a leak but could not finds any wetspots around. I was going to fill it up but not just yet so I can observe if it continues to go below the "low" level. After I came home, I noticed the level was back up to "Mid" which was it's original level.

Is this normal? I'm thnking there's tons of air in the system?

What do you think?

TIA

what's the best remedy? run the engine with the coolant cap off? and for how long?

how the heck do I do that?

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