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Overheating 2007, Mk6

MUS7494
MUS7494
in Ford Fiesta Club

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This appears to be a common problem.

Anyone found the cause?

My car symptoms- cooling fan doesn’t operate when it should.

Engine is sound, no compression/power loss.

No water in oil or from exhaust(head gasket ok).

Engine flushed.

Thermostat changed

Relays changed

All connections cleaned

still overheats after a run.

Ive now fitted a manual switch inside the to turn on the fan. This stops it boiling over.

still want to find the cause and make a proper repair.

Could it be the ECM?

Any ideas? 
Thanks for your help in advance people.

  • Quote


    Check thermostat if ts an after market as had faulty ones of them

    Poss air lock in pipes

    Do all coolant pipes get hot (including hot air in car)

  • Quote

    If it's a two-speed fan, check the resistor on the corner of the cowling.

    Have you got an accurate temp reading for how hot it's getting when it boils over?

  • Quote

    Is this really a thermal problem. Could it be anything with a gasket leaking combustion into the waterway. Pressure test 

    Unusual to have a boiling situation. Remove radiator and reverse flush. Remove and check sensor, is the relay being powered.

    A multimeter  comes in handy. 

    Wife has a 2008 1.6 tdci 70k goes like a watch 

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