Kent has them in now
 

Get some before they're gone.

Apparently only for the 1990-1993 300D 2.5 Turbo 5.

All others still bear the notice "Currently out of stock"

Does anyone understand the difference between each of the various nozzles?

I've seen model numbers like 261, 265, 320 (I'm making these up)...

Some are virtually the same. For example OEM German made Bosch 240\ are long gone - NLA except NOS. Their replacements are #261s #265s or even #314s. Per my measurements years ago they flow slightly different amounts and the cone pattern is slightly different. However those marginal differences do not really amount to something you can feel at the pedal or fuel tank. The #315s flow the most for a COTS item. COTS = commercial off the shelf. The #1930s the least. The latter are long gone too

Is there any advantage in installing monarks if your injectors have recently been serviced, but your nozzles are 200k original?

Depends if your nozzles are worn to the point of needing R&R. Nozzles are like any other wear item. Sometimes “worn” nozzles / injectors can be serviced because they in fact needed servicing , e.g. shimming, cleaning, et cet. However, once nozzles start to pee pre or post pop or both, it’s time for a R&R. Of course new nozzles will enhance performance. My favorite person is the 1 out of 100 who claims he sees no difference in new vs completely worn out nozzles. Of course it doesn’t matter if you show him a video of before and after and point out how it’s amazing the old German diesels still run when you would think it would be impossible with pissing nozzles or those which just weep. At some point all the German made nozzles will be gone.

I understand that people want "made in Germany" but there is potentially a difference between that and a label that just says "Germany" - "Germany" is the Febi trick - Febi might be a company that is German but that doesn't necessarily mean that their parts are actually made in Germany...

...now I don't wish to generate a Xenophobic out pouring (I assume there's enough of that on the OT section of the forum) but I do think people need to understand the difference if it is already not clear. I see no sense in individuals paying extra for something that might not be what they thought it was.

(Note also the real NOS is probably going to be labelled as Made in West Germany!)

Hey Stretch,

I'll take a peek, but pretty sure the old skool 240/ Bosch state "Germany" and pretty sure that means "Made in Germany" A lot of nozzles which I have recently seen have the Monark logo on them BUT they do not say "Germany" on the side on the nozzle. Older Monarks do in fact say "Germany" on the side. Those lathes were shipped off to eastern Europe and China so I am guessing that is the explanation with the logo but the ommission of the word "Germany" for those made in eastern Europe.

I have purchased FEBI, and a few others and no where on those parts is it stamped or labled, "Germany." I bought a TRUTEC part and it said "Packaged in Germany" which leads me to believe NOT made in Germany. So, as a consumer, if it says packaged or assembled in country X, I already assume it is Chinese manufactured junk.

In one instance, the "240" design - factory equipment for all W123 61x's from the power increase in '79 to the end in '85 - there's a tiny hole in the center of the pintle, and a cross bore just up inside. This causes a slight pre-spray that seems to make them run quieter and, possibly, burn better because the fire starts a split second before the main fuel charge comes along. 261's, the common Monark design which to my knowledge was developed by Bosch after 1985, instead have a small flat on one side of the pintle but don't seem designed to pre-spray like the 240's.


I've seen a set of the NOS German Bosch 240's on the test bench, and their behavior is unlike any of the newer nozzles I've seen. Super crisp, consistent release. That they can still run well after 40 years and 200-300,000 miles, even though they aren't truly "good" by their spray pattern and rust, etc. inside the injector, has me convinced that if you have original German Bosch injectors and they're still good, or can pick up a set of NOS, it's still the best option. Just be kind to the community and don't waste them on a beater car or one that will sit with water in the fuel for 5 years. :)

Got a small, but heavy package in the mail today :)

Dropped the rebuilt injectors in, replaced the return lines etc. Replaced the cigar hose because it was dry rotted.
Left the lines loose on the injectors, cranked the engine for 20 or 30 seconds to clear the air out.

Then it was time for the big moment.... Tightened the lines and turned the key. I have never seen an engine start so fast. It fired up literally the second the starter engaged, I couldn't believe it. Wow does it run quiet, I can't believe it. No more nailing, no more black smoke at idle, I'm dumbfounded. Runs so smooth down the road but still had a nasty shake at idle. After fully warmed up I replaced the rack damper bolt and now it runs like new.
My old rack damper spring was REALLY soft, probably broken. The new one is way stiffer and makes the engine idle like a dream.

Thank you for this explanation - I was under the impression there was a new improved design in the monark or Bosio nozzles due to those tiny pintle orifices clogging easily.