Done job. Needed an 8 mm square to undo the drain. Only about 1.5 litres came out but was clear. Found the breather cap just under the air pipe was easy to get to and fed new oil into it down a funnel and pipe. Put 2.5 litres back in. Did not look as though water could get past it to me if it was poured over it. 2007 x250 with 6 speed box