there is a purge valve on top of the thermostat housing that is used for getting all the air out of the system. should be 12mm with a hole on top. while you are filling the radiator, it should be open till you see coolant coming out. when this done. tighten up bleeder and top off radiator. then start the car. without bleeding off the air in this system, this car will overheat and you wont have coolant at the thermostat so it wont open. hope this helps