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Old 08-13-2002, 01:29 PM
surfblau's Avatar
surfblau surfblau is offline
neue Dieseler
Join Date: Feb 2002
Location: san francisco - immer kalt, immer windig, I want to move
Posts: 382
my experience

When I opened up my 617 injectors because of nailing issues, I found that most of the heat shields were pretty coked up, but instead of having no heat shields, one of my injectors had two heat shields.

I removed the extra shield, and replaced all the rest with new (clean) shields and the nailing went away.

I am guessing that MB designed the heat shields to also provide an easy way to remove carbon from the prechamber area without having to clean more of the injector face. Just a guess.

In any case, I would go look at the factory manual that discusses injector R/R for your engine. That should make it clear whether you need shields or not.
84 300TD - 235k - Farbe "Surfblau" bought at 213k
87 300SDL - 131k - Farbe "PimpGold" bought at 115k
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