I noticed the SD #6 injector has a plastic shield around it. The shield has splines to mesh with the lockring. It's a directional shield meaning that you can clock it along the splines. I recall some discussion on this shield but I can't find it in the archives. Anyone know what this shield is for?

Thanks,
Sixto
93 300SD

Not sure what it was used for, but I know that MB USA has discontinued the part. Tried to get a set a few weeks back as mine had broken apart after last injector rebuild..stealership showed them as deprecated.

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1982 300TD 210K miles ("The Replacement" aka "The Anvil") - SOLD
1979 300SD 245K miles (never ending project)
2007 Pinarello F3:13
1995 Ducati 916 (SOLD, sniff)
1999 Ducati 900SSie (SOLD)