I did install the Subaru thermostat and it fit nicely. I did not have the Subaru running when i filled it back up though. No bubbles.
It is a 2.2 engine and is fairly new, not enough miles to worry about. We're in the middle of putting in a new water pump so the car is currently out of service.
Any idea on how to remove the left camshaft pulley? the nut is huge. The directions say to remove the left camshaft pulley, is that the pulley left of the first one on the right? Any way to stop the pulley from turning so i can loosen it?