I received the Monark Spray Nozzles (made in Germany) that I had purchased from Hessian Imports way back on Feb 5. But until yesterday and today I had the time to pull, rebuild and reinstall them.
While doing the Pop Testing (setting the nozzle opening pressure) I was pleasantly surprised to find that these nozzles were extremely consistent. They all had a good chirping (or what ever you want to call it) sound even when I worked the Pop tester handle very slow and passed the leak test; indicating that the seating area is good. They were all the same not one preformed worse than the others and they were all excellent.
I can’t say this for the last set of six new Bosch (VW Rabbit spray nozzles used in my Volvo; Made in Brazil @ $11 each) nozzles I tested. 3 were good, 2 were OK but borderline (no chirping sound) and 1 was poor (leaked slightly during the leak test).
After they were installed and the car test driven I found they are slightly quieter at idle and the idle was slightly smoother.
The quality appears to be high and the price is economical compared to Bosch or especially Bosio spray nozzles. If you are interested I purchased them through C Sean Watts, hessianimports@bellsouth.net . Contact them concerning price and shipping.
[Be sure to wash out the preservative oil that the nozzles are shipped in. I soaked mine in diesel fuel and pumped the pintal in and out to circulate the diesel in and the oil out. Of course do not mix the nozzle parts up; the pintal that came with a spray nozzles is fitted/seated only to that nozzle.]

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84 300D, 82 Volvo 244Gl Diesel

We are all glad you have a good experience, but you shoulda done a search and added to several of the threads that already exist about nozzles. Sean will soon have repeat business from me, but for everyone benefit long threads about one subject are much better than many short ones.
here's one
here's another
here's a third

To be honest I just did not think of adding to one of the other threads. Don't I get a little equal time after reading a lot of new threads concerning a member finally doing their Valve Adjustment, changing front wheel bearings or a Brake job on their car?
Several months ago severl members were asking questions about Monark nozzles and there is not alot of user information avaliable about them (even when I did internet searches on other sites). So I thought that there maybe some people who want some feedback about them.

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84 300D, 82 Volvo 244Gl Diesel

As a long time member I've found it to be the greatest help when people add to threads that keep the same topic rather than start new threads on the same topic. Sean did my injectors and I am very happy- pleased enough to send him a second set soon. Overriding that is the unwritten rules of shop forum- the best forum on the web with regards to MB diesels, tone of the members, and the ease of getting answers to MB diesel questions. I hope by adding to this thread that others will read and do two things- add to existing threads if they have a comment on topic, and get a positive impression of Sean @ Hessian imports. I have no financial interest here.

I do appreciate the candor on the parts of both of you. I regard this forum as one of the "good, productive and informative" corners of the web.

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1987 300D (230,000 mi on a #14 head-watching the temp gauge and keeping the ghost in the machine)
Raleigh NC - Home of deep fried sushi!

Since I dug up this old Thread I have to say I have had no issues with the Monark Nozzles and even though they were not made for it I rebuilt My Volvo Diesel Injectors with Monark Nozzles.

Unfortunately since I started this thread the Cost of the Monark Nozzles has gone up.

Also back in 2008 there was still some German and French made Bosch Nozzles available but at a higher cost than the Indian made ones.

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84 300D, 82 Volvo 244Gl Diesel

IF (and that is a big IF) you truly want your Mercedes to operate the way MERCEDES designed it to operate, you will purchase Bosch injectors DIRECT from the dealership. Bench tested and pop tested direct from the Gods at Mercedes Benz. Yes, you will pay substantially more $$$$$$$ for them but there is an old saying: "There is the PRICE and then there is the COST".

That seems so preachy. Considering there are those of us that have had such great results with the monarch nozzles, I question the validity of your position.
You had your monarchs bench tested and balanced? Did the same person do the new nozzles? Did you compare the results from the monarchs to the bosch? Was there a timing issue? Improper installation? Other defective parts?

I agree there is price and cost. If I don't fully understand or troubleshoot problems it will Cost me dearly in the price of random parts I throw at the problem.

I don't want to come off too strong but making your above statement causes me to inquire about the path you took to arrive there.

I paid a reputable diesel injection firm to install the Monark nozzles on the original injector bodies and to bench test and balance them. They checked out fine so I installed them in the car. They nailed loudly from the date of install and continued until I removed them last evening.

From the originator comes the original design which gives us best performance. Mercedes Benz created and designed THEIR cars, their parts, their components. In addition, the last advertisement I saw, Mercedes Benz is in possession of over 80,000 patents laying claim to various automotive design(s) and processes.

Neither you, nor I, nor anyone else posting on this forum can claim that. So, do we trust the originator to provide us with top quality parts DESIGNED to work best with the cars they CREATED and DESIGNED or do we go to outside third parties for said parts? When you purchase a part from the Mercedes Dealership, notice it is packaged with the Mercedes Benz logo and trademark notoriously posted for all to see. They have built an international empire on one word and word only;

TRUST.

Notice when you purchase a part from Autozone it does NOT have the Mercedes Benz logo and trademark notoriously posted. Granted, the Autozone part may be only one third of the price of a similar part at the Mercedes dealership, BUT IS IT THE SAME AS? I think we know the answer. Yes, your Mercedes Benz automobile will dog along on third party parts but in my experience it is not a happy camper. The big German Shepherd wants its' big German Shepherd designed specifically for it parts and components. Either give the doggie what he wants or get out of the game.

There is a Ford dealership right down the street.

sometimes true but ... there IS aftermarket parts that are better than factory ones ...

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current fleet
Ford f350 dully 7.3L 1990 . ats turbo , zf5
Mazda 4x4 b2600 with 617 20-26 mpg
Past fleet
1983 240D w123 232k 25-30 MPG
1984 Ford f250,1979 ford 150 300-6 (sold@ 251K )
81 300D, 79 240D , 2x 76 300D ,74 240D , 2x 89 grand prix , 85 grand fury , and several other fords

Custom machine shop work ..

Whatever.

I'm convinced!!

I guess my queston is: you wanna gimme those old crappy Monarch nozzles? I'll pay shipping...

Actually, I am going to take them and have them bench tested again and will retain them for future reference. I'll post photographs of them, I think after you see their condition you might reconsider your offer..........

you know .. they have a warrenty also ..

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current fleet
Ford f350 dully 7.3L 1990 . ats turbo , zf5
Mazda 4x4 b2600 with 617 20-26 mpg
Past fleet
1983 240D w123 232k 25-30 MPG
1984 Ford f250,1979 ford 150 300-6 (sold@ 251K )
81 300D, 79 240D , 2x 76 300D ,74 240D , 2x 89 grand prix , 85 grand fury , and several other fords

Custom machine shop work ..

Warranty against what? Warranty to attach to the injector bodies? Or, warranty to operate like original OEM injectors? One of them has a large area of black soot across the entire face of the injector, the others are sooted up but not as bad.