PeachParts Mercedes-Benz Forum - View Single Post - injector heat shields for a 300D

surfblau · #2 08-13-2002, 01:29 PM

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.