The gauge is OK since guess what happens after 120C
yes... you are right you can hear the boiling in the coolant tank and some coolant can be seen outside (pressure is pushing it out through the coolant tank safety opening.
Both of the fans are rotating. I changed the driver side fan last year (fall) and made sure all assembly is functioning properly. I just double checked fans yesterday.
Yes, at full speed (110C) you can hear the front fans rotating from the inside of the car (with radio off)
There is no dirt at all in the front or in the back of the radiator.
At highway speed I can hardly keep it 95C-100C.
I have a check engine on (but I checked on the computer and this is related to Air Flow Meter)
Thank you for helping me.