Any chance of the engine code. Regards Peter

More than likely the head gasget typical symptoms if it was the radiator then it would just run hot..

Depending on the engine code on some of them you can see the impleelor with the stat removed. This was most probably fitted with a plastic impellor to avoid sheering the Teeth off the cam belt if the car freezes up in colder climes. However it is not uncommon for the bond to fail and the impellor is spinning on the shaft. But I need the engine code to check. Regards Peter

I have replaced probably 30-50 head gaskets in my motoring life and never found one that was directly responsible for the engine boiling, the problem has always been due to loss of water as a result of the gasket leaking.

I presently have a Citoren XM 2.1 td with a leaking gasket which originally overheated due to water ejection, I have covered over 5,000 miles since without any overheating at all, as a result of leaving the pressure cap loose so no pressure builds up in the system.

This doesn't work in all cases, it depends how badly the gasket is leaking.

But I repeat, a leaking head gasket does not in itself cause an engine to boil.

Thanks for all the replies, Id forgotten where I posted this.

The radiator doesn't seem to be getting hot at all. I'm going to try investigation a few things over the weekend.

cheers