AndraWint

i have an Audi 80 2.8 v6 that will not stop boiling up even after the fans have kicked in. work i have had done: new thermostat, and temperature control sensors. the car had been stood for 2 years when i bought it, and had oil in the water which turned out to be the oil cooler. The oil cooler has been changed and flushed but it keeps boiling over. It is not the head gasket. My mechanic suspects the rad? Has anybody any advice or come across this in the past?