Have a good look and read http://www.ebay.co.uk/itm/111777726925?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1555.l2649 on September 21, 2015, 7:56 am, in reply to "Re: Citroen C5 - Turbo charger failure, Very high engine oil level"
If you decide to take this on explain all about these engines explain about my oil feed pipe (not a pitch) then also tell him he MUST return within 150 miles so you can check for swarf build up and extend that mileage a little at a time as you see fit. also tell him the job will come with NO WARRANTY and put this clearly on the invoice. No main agent around leeds area (mazda,volvo,citreon and peogeot will replace one of these units without a NEW ENGINE!!. Just cover your ass.
sean
http://media.wix.com/ugd/bff3d2_1307f92d7da342d4955dc4c73ddde15f.pdf