I'm reinstalling the fuel filter housing on the OM615 out of my '76 206D, and came across something I forgot to properly document as I was taking everything apart. I've got three banjo fittings on the housing -- but one bolt is different! Compared to the two others which have multiple large holes, one bolt only has one very small hole:


I currently have it in the line going to the injection pump input -- is this correct? Is this bolt even correct, or should all three have the same large holes?

Small hole (restriction) should be on the tank return line.

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“Whatever story you're telling, it will be more interesting if, at the end you add, "and then everything burst into flames.”
― Brian P. Cleary, You Oughta Know By Now

That means it's the top one -- Thanks!

Would you recommend new brass washers?

New washers. Either copper or aluminum.

__________________
“Whatever story you're telling, it will be more interesting if, at the end you add, "and then everything burst into flames.”
― Brian P. Cleary, You Oughta Know By Now