ive got a 2001 fiesta 1.25,ive changed water pump,thermostat and radiator
but still have circulation and over heating problem

Hi have you bleed the system when re filling system, To do this Turn heater valve to hot leave header tank cap off fill with coolant, bring up to temp.by fast iddle check if heater is ****ing hot, allow to cool top to correct level.
If still overheating do a coolant pressure check, engine compression check,
Other causes of over heating Head Gasket Failure, Crack in Head or Block, in correct timing

small chance, but the parts you fitted may be faulty..?

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hi mark
not much i can add to here, our members seem to have covered all options, except one , does your electrical fans work as they should ie by thermostatic control, check it out mark. regards dj dave.

i would install nos its great for cooling intill it reachs the engin and increases the horse power cheaply heres how needcarhelp - CAR GUIDE TO NOS

If you wont to uninstall your nos needcarhelp - CAR GUIDE TO NOS

dear member
i'm intrigued, please elaborate /explain what is nos. regards dj dave.