Stickyfinger wrote:From what I understand, it is carbonized diesel/oil mix. A chemical engineer (Classic Jag racer) once explained to me that with older mineral oils, the carbon particular formation was like a snow ball, round and layered. With Synthetic oils in the mix, it forms in a laminar shard-like form, this is harder to flush as it locks together. He exclusively only used Castor or 100% mineral dependent on the race......
Are you sure it's not debris from the broken turbo, it was on my 2004 2.0 HDI, my oil pick up was just like the one pictured, unfortunately after cleaning it all out, flushing the system and changing the filters it ran fine for a few weeks then threw up a low oil pressure warning and started to knock, I suspect there's a blockage in the oil galleries.
It's now been sitting on my yard since before Christmas waiting for me to make my mind up what to do next. (See my post 'Offers invited' in the for sale and wanted forum.)