I whipped the sump off this morning. Oil pump belt broken as I suspected. Pump seems to be turning OK but it's hard to tell what caused the belt to break if the wasn't the pump so can't really conclude that it's up to manufacturer specs without replacing the belt to see, I guess. To do that is another couple of hours work removing the timing belt, crankshaft sprocket and it's oil seal which I'll probably do over the weekend, weather permitting.... sure, I've fuckall else to do! The belt is 40 notes from SMF so it'd mess with my OCD not knowing if replacing it might have fixed it if I didn't give it a try. Of course, without dismantling the top half of the engine there's no telling what damage the loss of oil pressure might have caused before the engine shut down so it's a bit of a long shot. I don't think it killed the turbo because the fault code for that is specific to the actuator module which would have been starved of vacuum when the belt broke - the oil pump doubles up as a vacuum pump, apparently, so that's a pretty logical code to get when the belt breaks at 80 kilos/hour, I guess.
