Ha! Paydirts!
I had another look around the shed and found a 6 sided socket…but as I might have let slip, the nut was way beyond that sort of thing. I should really have looked harder in the first place before I buggered it completely.
The chisel wouldn’t work, not enough room in beside the frame rails, so I grabbed an old screwdriver (my pop just rolled in his grave!) but that wouldn’t budge it either.
So I think, in for a penny, and with a LITTLE file, make two flat sides to fit a 13 mm OE spanner. (If this doesn’t worked I’m all for emptying it by upturning the thing!)
Thank Christ that worked :woohoo:
Now, I need a new alloy sump plug. These things look like they’re spun, can anyone recommend a turner in Penrith? Luckily the filler is (or was) exactly the same dimensions!!!