Returning to this thread because I still have some coolant loss. But no obvious leaks.
Roy mentioned a possible head gasket issue. I attached here a bubbling video to describe what I wrote above. It will slowly rise until it just comes out of the radiator.
Video (Click to make bigger)
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Thursday, April 9th, 2020 AT 6:16 AM
ASEMASTER6371
MECHANIC
52,796 POSTS
Yep, I see.
I would have the leak down test done to check the head gasket.