on a long trip the mrs mx5 overheated. When she bought it, it had obviously had a new radiator core and electric fans which suggests its had coolant problems before.

 

Greenflag were rubbish when they came out to see her as he just topped up the water and sent her on her way, unsuprisingly it happened again (although he didnt bleed the system at all)

 

On her drive home she was sat in traffic for about an hour with the engine on and it didnt overheat at all, but as soon as she started driving above 60 it got increasingly hotter with speed which would have eventually resulted in overheating again so she slowed down.

 

The levels are fine on the car again now shes back, but its still overheating and we are confused as to whats going on really. Thermostat maybe? The electric fan is working fine, but strangely doesnt come on once the ignition is switched off. Water pump?

 

Ideas will be well received guys and gals...

Sounds like a circulation problem mate-get the rad checked out! ;)

Has the waterpump been replaced?

I've worked on a few different Mazda's MX-models and I've noticed on some of them the blades/rotors in the pump can dissolve completely due to rust/corrosion.

thanks guys, its still under warrenty but at least we have an idea what might be wrong as the warrenty guys will only payout up to about 500£ for cooling problems.

I used to drive a 323f GT with basically the same engine and had a similar problem.

Turned out it just needed a new thermostat.

:smw: