Quick update, soon as I hit "post", shop called. Apparently they pressure tested system and ran at temp, they say it is the coolant cap (apparently there have been revisions). I don't know if I accept answer, as when I added water, some poured out immediately underneath; granted, I spilled some, but appeared more leaked than was spilt. Also, my trunk carpet was totally dry.
Is it possible to loose that much coolant via cap within 30 min???
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