Thanks for that. The viscous coupling on the fan has been replaced and fan operates okay. Am in Kununurra but the Nissan agent is booked out for three weeks and just doesn't seem interested in travellers. One mechanic told me he suspected a problem with the head gasket another told me probably...
My D22 has had a new radiator and new water pump but is still overheating. At slow speeds it heats up quickly and I have to either turn the ignition off or speed up. This morning it seems to have got worse and is now overheating at anything under 30kph (approx) Not using cooling fluid and no oil...