Hi Rainsey, the thermo fan is 240mm dia (ebay) and mounted on top of the intercooler, when BD were fitting the engine I asked for a larger air scoop (the truck was originally a 4.5 petrol, no scoop) so the fan fits nicely inside the scoop housing with enough space for air flow for normal driving. Living on the south coast, Shoalhaven, but travelling whenever possible.

regards

Peter