First of all my motor is a b18c with a t3/t4 turbo. My motor runs at normal temperature for about 30 mins to 2 hours sometimes, then it will go all the way up. I have a brand new water pump, thermostat, and headgasket on it. Thermostat was changed twice and tested on boiling water to make sure it's functioning and all passed. Radiator is a stock one with 2 12" universal fans, all working. What can be my problem? any help is appreciated.

 

are your fans kicking on?

 

yep