I primed the turbo before connecting the hose, then turned it over with injectors disconected for 30 secounds or so for good measure. As for the resticter, not sure, the turbo only came back with a new union/adapter which has a hole straight through it, so guessing it's not a resticter, this was a new union supplied not the one i sent it away with. The car does have a high pressure oil pump, but this does not explain why it never smoked prior to fitting the t38. Colud it be a faulty seal in the turbo?