KL31 -
Did you figure out whether or not it was, in fact, a head gasket issue? I am having a very similar issue. Your situation is where it began for me, and now, I have another untraceable leak. It seems to be originating from under the throttle body somewhere, but I can’t seem to trace it down. After finding so many coolant leaks on my Kizashi, you’d think I’d be a pro by now… but no luck!
I drive a 2010 as well, with 250,000 miles. I’m trying to keep her alive!
