i have changed water pump,radiator and thermotast and it still overheat
(In addition to the above suggestions) Are the hoses good? Old hoses can collapse, blocking water flow. They should have been changed with the radiator, but not everyone does. Has the radiator fan been checked out to be sure it's working properly? If the fan isn't working properly, enough air might not get through to cool it down properly. Is it actually boiling over, or is the temp gage just showing it hot? I ask because it could be a faulty temp sensor. I'll assume that there's no debris between the radiator and condenser since the radiator has been changed out already. This should also mean that nothing is in front of the condenser blocking airflow.
head gasket bad? engine timming off?
