Did you purge the Air out of the Car after changing the Expansion bottle?
Press Start (without pressing Brake)
Turn AC OFF
Turn Interior Temp to Max
Interior Fan speed to 1.
Press Gas Pedal all the way to the floor for 10 Sec.
Now Water Pump will start a purge cycle.
Keep Drive Door Open, do not close all the way.
total Purge time 11 to 12 min.
Do it twice if you want.
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