When I rebuilt my AC, I couldn't see anything in the sight glass. Today when looking, I could see it alternating between nothing and a moving milky something. What am I supposed to see in there? Is that what it is supposed to look like?

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My Primary Driver - '85 300CD - 4-speed conversion, 2.47 rear, lowered, euro headlights, rebuilding (not restoring so much)

Wife's - '08 Saab Sportcombi Aero

Riding a '03 Yamaha Warrior