vauxhall vectra b 2.0i 16v possible over heating problem?
when i am driving around town my cooling fan keeps going on and off , i have done a gas test on the cooling system which come up negative and replaced the thermostat,the pump has been tested and is working , if i stay at 40 mph it runs at about 88'c soon as i hit traffic within seconds it goes up rather quickly and then the fan cuts in and when i pull up and turn the engine off and look under the bonnet you can see the water in the expansion tank bubbling when its at 92'c or above any idea's plz
matthew, July 2009