300tdi oil cooler pipe swap -- messy job?

Mornin!

Just bought myself a '98 300tdi Disco. Needs a few odds and sods sorting but generally looks pretty solid. Anyhow the oil cooler pipes are leaking at the rubber/metal joint. I'd like to swap them out so here's the question, with the engine stopped, (obviously! ), does the oil in the oil cooler siphon back into the sump or does it stay full/half full? Should I expect a gush of oil when I crack the nut on the bottom pipe?

Thanks.

It will leak out,but if you are quick you can have the new pipe ready to tighten onto the thread to minimise oil loss.

Thanks for that, I'll make sure I've got some rags handy then. The wench'll kill me if I get oil on the drive!

Remove the pipes from the block/oil filter first, let them drain into a container placed beneath filter housing (approx 1 litre will drain out), then remove cooler end of pipes.