Your 2002 Mazda 626 4cyl keeps over heating when driving down the street not even 1 mile But when left to idle in park it will not over heat what could this be?

Your 2002 Mazda 626 4cyl keeps over heating when driving down the street not even 1 mile But when left to idle in park it will not over heat what could this be?
I'd start by checking the coolant and look for leaks. I'd go further by seeing if the thermostat was good. You can grab hold of the upper hose on many cars and feel if water is flowing or getting hot.
Is the fan working when your parked? Is there anything in front of your radiator. Is the water pu
mp working or leaking. yes this model has a big problem. i have worked on many and found that the radiator blocked as they were built with the cylinder head restricting the flow, so at speed it WILL OVERHEAT SO just do a good radiator clean,then reverse flush the motor with head every 12months or so.bazza