I HAVE A 2002 FORD EXPLORER XLT I HAVE CHANGED THE WATER
PUMP,TEMP SENSOR&THE THERMOSTAT AND IT STILL OVER
HEATS.COULD YOU PLEASE TELL ME WHY?
Maybe air in system try bleeding air like this. Remove cap from overflow tank fill with antifreeze to full mark leave cap off and start vehicle and let idle you will notice level in tank start to rise this is normal once thermostat starts to open level in tank will drop add more antifreeze to full mark then put cap back on.
Is coolant passing through the radiator? Hopefully no one put stop leak in the system as an easy repair to a leak.