Does air get introduced into the system by removing the engine fill cap?
Its the degas bottle cap and I'm considering replacing the bottle as well. I have small coolant leak and the mechanic told me its the cap
Haha, I couldn't steal all of his thunder.
You could have. You just needed to post one or more links as requested...
... I'm guessing that would rule out the Fan Relay needing a replacement which Wheel Works suggested. ...