Hi
The car was driving perfectly until the 'Engine running hot' Warning light came on, although the radiator fan had been operating at high speed after the engine was switched off for a few months. The Bubble test is another name for exhaust gas in coolant test.

Hi Hoping that someone with more knowledge than me can give me any ideas please. When driving at below 55mph the engine runs at 110 deg C. Any increase of speed and the temp rises until finally the 'Engine Hot' warning light comes on. I have driven it like this for 7k miles. The cooling fan runs at ...