Should I disconnect the battery when doing thermostat???

[xsx450]

Hey guys so I just did my T Stat, When refilled it i didnt know about this special burping sequence... Today (2 days later) I burst my ET.

My Indy says its easier if he uses some "Vacuum" tool to suck the air out. I would prefer not to pay him right now.

I am getting another tank but I want to make sure I do not do this again. So when i replace the tank All i need to do is turn the heater on 90 (three red dots up top)

Start the engine (Do i run it like this while off at all??). And then slowly fill until the floating dipstick thing is in the full position?

Is that IT??

I do not want to pay for this air vacuum service but I really do not want to pay for another expansion tank either.

thanks!!