dwlawson

Filter was Mahle OC593/3 tightened to 20Nm. Every other oil filter I do is as tight as I can get it by hand but I understand it is a bit more critical on this engine. When I took the filter off the bush was only in the filter a fraction of a turn as it was wobbling about. That's what initially drew my attention. I must say I'm reluctant to use any solvent on there but I dare say brake cleaner would evaporate pretty quickly.

Changed the oil the other day and the threaded bush came out with the oil filter. Luckily I noticed before I threw it in the bin. Should I screwlock it into the block or just keep an eye on it in fututre?

I read earlier in this thread about the Mann oil filter W 712/94 being recommended. I looked it up and see it is advertised as having two non-return valves. How does that work? Do the Mahle filters that I have been using only have one?