Hi! Everybody I am new to this website I would like to ask you all for help I have gs300 2001 the problem is when the car heat the water from radiator goes to reservoir and spill out and this happens when I stop the car I changed the radiator and check the headgasket and there is no problem please I would like someone to help me with this situation and tell me what's wrong

 

This is an ISF build thread. Wrong place to post your question

 

Check your thermostat, maybe it's not opening.

 

I took the termosat out still same thing