I have a 3.0L in a 87 300SDL, and I have a few 3.5L, but one has a bent rod, but the injectors only have about 17,000 miles on them. I have a leaking injector in the 300SDL, and was wondering, can I just replace those injectors as a set with the injectors from a 3.5L out of a 1991 350SDL?

Thanks.

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1987 300SDL #1, 1987 300SDL #2, 1980 240D, 1982 300SD, 1994 S350, 1990 350SDL, 1991 350SD, 1985 300D, 2005 E320CDI

Gone, but not forgotten: 1981 300SD, 1982 300SD, 1987 300SDL, 1983 300TD, 1980 300CD, 1981 300SD #2, 1987 300D, 1987 300TDT, 1980 300D

I doubt it.Injectors are made for a certain engine.Now I've heard of mixing VW diesel injector parts with a 617 turbo.

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1999 w140, quit voting to old, and to old to fight, a god damned veteran, deutschland deutschland uber alles uber alles in der welt

The nozzles are the same, the bodies are not (the ones on the 3.5 have different threads).

-J

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1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket

Tesla Model 3. 205,000 miles. Been to 48 states!
Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels.
2014 Cadillac ELR
2013 Fiat 500E.

If the injector threads are the same in my opinion and the threaded body length identical .They may be okay. The pop off presure requirements for both engines are the same I imagine or close enough.

If one type have a larger nozzle it is not that much larger. I would check to see if the replacement nozzles for both series of injectors quote the same part number.

The displacement of both engines is close enough they may be the same part. Superficially if the conditions above are met one set should replace the other. I am not sure of course as there may be something I am missing.

If this is so and I expect it is you could have the newer nozzles installed in the old injectors. They should be pop pressure tested though as well if this is done

. Perhaps easier and cheaper overall just to buy or find one injector to replace your problamatic one for now. Thats if money is a concern.

The older (#14) heads have the threads up higher on the injector bodies. The newer heads have the threads down at the base of the injector. I don't believe your 3.5 injectors will work on the 3.0 head. I have a set of good 3.0 injectors if you get stuck.

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Chief

1991 350SD

I believe they will if you swap the 3.5 head onto the 3.0 engine.

What a big Lemon of the day.

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Not MBZ nor A/C trained professional but a die-hard DIY and green engineer. Use the info at your own peril. Picked up 2 Infractions because of disagreements. NOW reversed.

W124 Keyless remote, PM for details. http://www.peachparts.com/shopforum/mercedes-used-parts-sale-wanted/334620-fs-w124-chasis-keyless-remote-%2450-shipped.html

1 X 2006 CDI
1 x 87 300SDL
1 x 87 300D
1 x 87 300TDT wagon
1 x 83 300D
1 x 84 190D ( 5 sp ) - All R134 converted + keyless entry.