I recently got my 2018 FFE battery replaced under warranty. Despite me asking the dealership specifically to fill and bleed the coolant system, I'm now pretty convinced they didn't. The other day when charging cold it was making some pretty ugly buzzing noises which I suspect may be the battery loop pump running dry. I used this ForScan procedure to try to get the bubbles out and I heard a bunch of air bubbles, but it didn't seem to do much. I tried to use a vacuum fill and bleed device on the overflow tank but I couldn't pull a consistent vacuum on the system. I just opened up a coolant line between the bypass valve and the radiator near the top of the motor and it was bone dry. The funny thing is that the overflow is full. How do I actually get coolant into this thing?