Hi All I have now attached a video and have more information. In past weeks the vehicle has been well used and there are no performance issues, no smoke and no change in the noise. I removed the intake pipe this arvo and the compressor wheel is sound i.e. there is no movement. I went to a mechanic yesterday to talk about options and he threw straight to a new turbo at roughly $4800. I asked if he had ever fitted a kit or cartiridge?? He said "no - it's not the turbo that goes, it's the actuator and you can't separate them. He told me he put 5 2nd hand turbos into a Prado with the same engine but the problem wasn't resolved until he put the new turbo in. I won't say anymore about that. I am convinced it is not the bearings being worn and the compressor or turbine are not rubbing on the casing. My question therefore is - What the bloody hell is it?? Cheers Rory IMG_1262 Hilux.MOV