I've used seafoam on my OM617 before, same procedure as diesel purge and it works like a charm. I would never feed it into a vacuum line like on a gas car though, thats a sure way to ruin something.

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TC
Current stable:
- 2004 Mazda RALLYWANKEL
- 2007 Saturn sky redline
- 2004 Explorer...under surgery.

Past: 135i, GTI, 300E, 300SD, 300SD, Stealth