This is why you shouldn't drive a 3.0L Roadster through water: The flywheel is exposed at 6 o'clock on the Series 1. Maybe this was revised with the gearbox change from Getrag to Ford.
Some time ago I fitted a plate to keep the road dirt out.
DaveW '05 Red Roadster S1 '16 Yellow (Not the only) Narrow AR GDI Plus 4