There are 2 types, and each "type" has a 115 BAR and 135 BAR version. I will try to get some pictures.

I had a look at the injectors in my 300D -- the part number is NA31X, which I believe is for turbo engines. Forgot to mention that while the car is originally N/A, it came with a shotty ghetto-looking aftermarket turbo unit and I assumed by what a terrible job they did that the injectors were still original but perhaps not.

Maybe I'm better off cleaning the injectors and replacing the nozzles myself...hopefully someone in this town can pop-test them.

__________________
1985 190D 2.2L 717.411 5-speed
1983 300D Euro OM617.950

NA31X is the older part number for NA34X These are for the Turbocharged Engine.

NA30X is the older part number for NA33X These are for the Engine with no Turbocharger.

Those numbers will be on a Plastic Band that covers the original numbers stamped on the Rebuilt Injector Body.
I have assumed that that the numbered Plastic Band is used so that they can use any upper Injector Body regardless of what bar pressure is stamped n the Injector Body.

__________________
84 300D, 82 Volvo 244Gl Diesel

Notice the difference in the size of the Parts between the 2 Injector Bodies. The internal parts are also a different size.

If you take these Injectors apart keep all of the parts that came from that one Injector together.

If they are used as whole/complete Injectors and the Injector Nozzles are the same and the Pop Pressure is the same both style Injectors can mixed together and used on the same Engine (that is in the Manual).

The one on the bottom is the older style.

Attached Thumbnails

 

__________________
84 300D, 82 Volvo 244Gl Diesel

Ah, a picture says a thousand words! I have seen both types, then. I thought Greezer was talking about the part below the threads.

Still, I don't think OM60x injectors will work in a OM61x and vice-versa.

__________________
1991 F250 super-cab 7.3 IDI. (rebuilt by me) Banks Sidewinder turbo, hydroboost brakes, new IP and injectors.
2003 S430 - 107K
1983 300SD - Tanoshii - mostly restored ~400K+.
1983 300SD - Good interior. Engine finally tamed ~250K.
Monark Nozzle Install Video - http://tinyurl.com/ptd2tge

The Engine that have Angle Injection have Injectors with the Threads near the Bottom and the diameter is smaller.

If you look at the pics supplied by the internet sellers you can see what Engine Models use what Injector Body.

__________________
84 300D, 82 Volvo 244Gl Diesel

Are these the NA33X/NA30X or NA34X/NA31X injectors?

__________________
1985 190D 2.2L 717.411 5-speed
1983 300D Euro OM617.950

NA34X/NA31X are for the Turbo Diesel

NA33X/NA30X are for the Non-Turbo Diesels

The "X" indicates that they are rebuilt.

Why did the change the Number on both of the turbo and non-turbo Injectors????
I really don't know but My best guess is that they changed the Numbers when they started using the Indian made Bosch Nozzles during the Rebuild.

The older or newer style Injectors can be built into turbo or non-turbo Injectors and they use a Plastic Band to cover up the original stamping on the Injectors and that Plastic band is going to have the NA**X number on it.
The original stamping numbers are coverd up so that they can randomly use the non-turbo or turbo upper Injector Bodies to make any Injector they want.

As far as the Older and new style Bodies as long as they are used as complete assemblies and are set to the Proper Opening/Pop Pressure they are interchangable with the New style Injectors and can be mixed in the same set.

The above is not to be confused with the even older type that does not have the little Fuel Return Hose Nipples.

__________________
84 300D, 82 Volvo 244Gl Diesel

When they went to the Angle Injection the Injector Bodies changed and they are threaded closer to the tip on the Injector Nuts.

If there was any 606 Engines made without the Angle Injection the Injector Bodies are compatiable with the older 60* Engines.
I don't know enough about it to know if the Injector Nozzles are the same or not so I cannot comment on that.

__________________
84 300D, 82 Volvo 244Gl Diesel

Over the past few months, I acquired a set of injectors from both a 240D/OM616 and a 190D/OM601. It would appear the injector bodies are identical but the part numbers are different:
OM601: KCA30S46
OM616: KCA30S35/4 244

Attached Thumbnails

 

__________________
1985 190D 2.2L 717.411 5-speed
1983 300D Euro OM617.950

The naturally aspirated Engines have similar Pop Pressures after that it is if the Nozzles are the same or not. On the naturally apiritate Engines you should find on the Upper Injector Bodh bar 115.

In the first Pic depending on the age of the 616 Engine it could have one of 2 Injector Nozzles.
And there is also 2 types of DNO SD 240 Nozzles. The DNO SD 240 has a smaller central Hole drilled into the end of the Pintel than the DNO SD 240/. does.
The DNO SD 220 has no hole drilled in the Pintle of the Injector.

As near as I can tell the OM601 Engine has DNO SD 261 Nozzles.

That is about as much as I can find out. I think greazzer would know more you might PM Him.

Attached Thumbnails

 

__________________
84 300D, 82 Volvo 244Gl Diesel

I found this I did not read through it.
http://www.peachparts.com/shopforum/mercedes-used-parts-sale-wanted/177582-mercedes-diesel-injectors-nozzles.html

__________________
84 300D, 82 Volvo 244Gl Diesel

Interesting....the other thread does say they take the same 261 nozzle. I'm cleaning my injectors this weekend and installing new Bosio 314 nozzles, which are supposed to be a size larger for a little more power. Can't wait to experience the difference!

__________________
1985 190D 2.2L 717.411 5-speed
1983 300D Euro OM617.950

Where does this sort of rumor type infomation come from; I have never read this anywhere?

The Fuel Injection Pump is entirely responsible for the amount of Fuel Undetected and except for alterations in the Pop Pressure when the Fuel is delivered.
Since the Plunger in the Fuel Injection moving and pushing the Fuel allong determins how fast or flow of the Fuel I don't see how having an Injector with a larger hole in it whill increase that.

Read up on the several stages it takes for the Fuel to burn and I think that you will see that delivering more Fuel too soon can actually cool down the burning of the Fuel during certain stages of the Fuel burning and effect how efficiently the Fuel is burned.

This is not a description of the several stages of the Diesel Fuel burning but the short story is that it is that the atomized Fuel needs to be turned into a Vapor for it to burn. The heat of the compressed Air in the Cylinder is some what used up during that conversion from atomized Fuel to Vapor and what is in the Cylinder gets cooled until the Vapor ignits.

On the other end of this Injector Nozzles with smaller holes in the atomize the Fuel better. Finer atomized particals means they turn to Vapor easier.

__________________
84 300D, 82 Volvo 244Gl Diesel

I've only been able to find the Bosio nozzles on IDParts. They carry SD 265 and 314, and claim the latter is "one size larger than OE nozzles, providing a small boost in power output for OM616, OM617, OM601, OM602, OM603 motors."
Bosio Injector Nozzles (SD 314) - IDParts.com

__________________
1985 190D 2.2L 717.411 5-speed
1983 300D Euro OM617.950