Bosio injector nozzles
 

Were do you get them? DO they really make a difference? My 300dt only has 119k on it, but from what Ive heard its a good idea to replace them every 100k. If the engine runs much better as they say they do, then Id buy them. I just dont know where to get them. I saw four on ebay though, and that diesel giant guy has em for a probably rip off price.

I got mine from diesel giant, they made a big improvement for my car....we put them on both of our SD's....they work great. Diesel Giant is probably the only place you will easily find them. And his prices aren't that bad.

True,
 

I have an older FSM in German that lists pulling and testing every 100K kilometers (62K miles) I think the replacement was something close to that. FWIW, I have a set of Monarks - purrs like a kitten at idle and went from the characteristic diesel clack under power to more of a subdued thump.

with the ball inside the combustion chamber you can run the original injectors until the pop pressure needs to be adjusted by adding shims. that is around 300 k miles. spray pattern is no issue what so ever with mb. don't listen to any of dieselgiant's sales talk

Web site
 

Here is the Bosio web site you might want to check the price there before you buy from someone else for my 300d I believe they were $37 each.
The Monark nozzles. That the other member used can be as low as $23 I only found tow parts places on the internet that sell them. Bosio web site below:

http://www.kermatdi.com/servlet/StoreFront

One thing I've never really seen distinguished upon in these nozzle threads that grabs my curiousity, do these nozzles make a difference in an NA 617engine and/or would it be worth it to install them in one?

One thing ive always wondered is if the clattering is a good thing. From what I understand, its the detonation of the diesel, causing a pinging on the cylinder walls. If it sounds soft, then that means that its a less powerful explosion right? Ive run a few gallons of vegetable oil through my car (with a setup under the hood like that when you do a diesel purge) for fun and noticed that at idle the clattering goes away also. With the monark nozzles does your car run better?

The big difference is
 

Pop (start of fuel ejection) pressure. NA = listed at 115 BAR, turbo = 135-145. Other matters like spray pattern, balancing, timing, etc. similar (but not identical) for the NA engines, too.

Good question - YES it does.
 

I'm not so sure loud always = more power. It still sounds like a diesel but it's smoother and more efficient. What you get when replacing worn out injectors = wide, stringy fuel jet, opening too soon even when the static timing is correct, inconsistent fuel delivery even when the IP is metering properly versus concise, controlled fuel jet delivered with good atomization consistently opening at the correct pressure for the correct duration. It adds up to the engine getting fuel the way it should. I need less throttle pedal to accelerate, it went from light smoke on start up to none at all and starting is just a tad quicker. To answer - Yes it runs much better but if your injectors test out OK I'm not sure you will see as big an improvement.

I get them for under $20 from HessianImports@bellsouth.net

You're sure?
 

I would have a look at these...

http://www.peachparts.com/shopforum/attachment.php?attachmentid=38670&d=1164899527
http://www.peachparts.com/shopforum/...rechamber4.jpg

and the other

http://www.peachparts.com/shopforum/attachment.php?attachmentid=38669&d=1164899014
http://www.peachparts.com/shopforum/...9&d=1164899014

There are threads on this site about people having problems with just replacing the nozzles.

Is just changing the nozzles a good idea? Metro Fuel Injection has complete rebuilt injectors for ~$40. Why put new nozzles on worn out old injectors? The springs and all the other guts will still have 150K, 200K, 250k, etc.

I only replaced my nozzles (the old ones were beyond shot) and saw a large improvement in power.

i replaced my nozzles in my 91 300d 2,5 with the bosio nozzles from Diesel Giant and they made a big difference.The engine starts better,sounds better,runs better and you have to look close to see smoke on a cold start (florida cold, not real cold).That said the car had 240k miles on it and no way to know when or if the injectors had been serviced so i suspect that any new injectors would have made a big improvement.I went with the Bosios because of the general bad opinion here of the India made Bosch and the good reputation the Bosios have at TDI club. My $.02 Don

Do a search on this site for Bosio nozzles. Several members believe that they recieved better preformance from them. A I believe they are considered higher performance nozzles. I have seen a few other articles about them on the internet claiming better performance.
One member did say that one of his nozzles went band and he sent it to Bosio and was told it was the fuel (WVO) that he was using causing the problem. Better to look at those threads.

Yeah WVO will probably destroy any nozzle over time....they are not meant for that. Nor is the engine itself....

When you get your rebuilds you send them your old injectors as cores. They reuse your "old guts" (except for a new nozzle) to make another set of rebuilds for the next customer. I other words when you by rebuilds except for the nozzle you are getting someone elses "guts".
The nozzle is the only part that really wears out.
I worked in fuel injection shop for 5 years. I have see 3 of the pressure springs break. Occasionaly the injector Nut cracks or gets eaten away when combustion gases get up there and ounce in awhile rust or erosion by the high pressure of the fuel eats through the interior sealing areas so badly that they cannot be lapped out. Those parts would be replaced.
Other than this there is no reason not to buy rebuilds.
Some sites sell Completely new Monark injectors (for a 84 300D) for around $80 each and should be replaced as a set. If you can find new Bosch injectors they are $125 each or more.

There is a thread somewhere about I believe it was 3 stages of combustion that the fuel goes through as it is injected; you might want to do a search on that. When and how much of the fuel is being burned at its various stages alters the noise it makes.
Again some of the threads of persons who have used Monarks nozzles say that they have quieter Idle. I have never tried them yet. I have cheap Itailan nozzles made by 7 Diesel in my car.

My question is, How do you tell 1 Bosch injector from another.
I have a set here, but from what I understand, the ones from India are not as good as those from Germany......How do I tell where these were made?

Well maybe:rolleyes:. They all have the same part # but there is 2 different #'s stamped above that......2 have something like 384 and the other 3 have 484......go figure

how well do they work?


My 300d needs new nozzles

Thanks! I just Emailed them. I knew a place that had them at $19.73 each but 2 months after I found them they were bought out by some one and never opened under the same name again. The new owners never answered 3 of my Emails.

There is no way to tell where the Bosch spray nozzle was made by looking at the body of the injector. You would have to unscrew the injector nut and take a look.
If your car was made in 84 like mine and you knew it had the origional injectors in it those injectors were made befor Indian made injectors came into the picture.

The number to be most concerned about is how many "bars" are marked on the body. They should all have the same pressure in bars stamped on them (and hopefully set at that pressure). After that as long as they fit it dose not matter.
If you pulled the injectors off of my car and looked at the numbers on the body you would be shocked. I built up a set of injectors for my 84 300d using VW rabbit injector bodys. I set the injector pressure to the proper pressure for my vehicle but the bodys are stamped with the bar reading for the VW rabbit.
I noticed that the Bosch rebuilt injectors have a plactic band with the rebuilt injector # on it. This plastic band covers up all the stamped letters and numbers on the injector body. I believe that they do this so the can grab any injector body regardless of the bar reading stamped on it and build it into what ever injector they want it to be leaving only the # on the plactic band for the customer to see.

Good question.
 

The nozzles and springs are the moving parts inside the injector. The thrust pin, spacer disk, shim and upper/lower halves don't really wear out. TRUE you can have a spring go bad or break but the part that wears out by design is the nozzle (body and needle.) Some people DO replace springs but the FSM doesn't list it as routine maintenance. It's covered in 07.1-6712 if you have the CD.

previous post
 

It still sounds like a diesel but it's smoother and more efficient. What you get when replacing worn out injectors = wide, stringy fuel jet, opening too soon even when the static timing is correct, inconsistent fuel delivery even when the IP is metering properly versus concise, controlled fuel jet delivered with good atomization consistently opening at the correct pressure for the correct duration. It adds up to the engine getting fuel the way it should. I need less throttle pedal to accelerate, it went from light smoke on start up to none at all and starting is just a tad quicker. To answer - Yes it runs much better but if your injectors test out OK I'm not sure you will see as big an improvement.

Sorry that happened.
 

Actually I'm apologizing for the other guy...the new company will be me on Jan 1. Monark is good manufacturer but I learned why US importers don't want to deal with them. Eu.1500.00 ($2250.00) minimum per order and they want suppliers to stock electrical parts, too. BUT... nothing ventured, nothing gained, right?

I'm waiting to see what they say this week - keep your fingers crossed.

With those so far poor quality made in India Bosch spray nozzles; Bosch has left the market open for another company from Germany in particular and other Euro countries to come in with a quality product.
If their quality dose not improve people will avoid buying their rebuilt injectors because they cannot tell where the spra nozzle is made.
Bosio has a decent Rep. but for my car the nozzles were $37 each; almost the cost of 2 Monark nozzles and you can get those Bosch rebuilt injectors for $40ish.

If you write to the Monark representative you might want to pass on what I said. Tell him Bosch has left a market open for them. I they would ease up on their rules and let you guys sell some of their product so that you have enough money to think about selling the rest of their line.
Also when I was polking around the internet I saw their electrical stuff also but from the impression I got from what I read the might have some sort of connection with Fram.
Good luck with your business.

I have new bosios for sale
 

I have 5 new injector nozzles that I purchased from DG and never used - car is gone - I will sell for 25.00 each as a complete set (125.00) Thanks!

Thank you.
 

Very true. There is a market gap BUT Bosch didn't quit altogether, they just moved to older design manufacturing from Germany. Companies other than Bosch have been there all along but not outside Europe (at least to any great extent.)

I think they know their market niche and this was evident two years ago. I went to visit a friend in Stuttgart and he told me about the small specialty businesses there that make "one off" runs of machine parts for many aspects of industry.

I don't know if they are affiliated with Fram but I would not be surprised since so many companies are intertwined in this business.

Wow, that`s scarry. how many miles were on those combustion
chambers?

Charlie

Did any raw fuel get down into the cylinders on the engine they came out of?

What year and model were they for; Bosio has different nozzles for turbo and non-turbos. Better, what is the number that is stamped on the nozzles. Also what state are you located in.

Yeah how many miles, because both of our SD's prechambers were in perfectly fine condition. One had 280k or so on it when we swapped them out for bosio nozzles, and mine had about 258k. All pre-chambers and pre-chamber balls were in tact.

Jesus...
 

If you read this, email me again. I deleted it accidentally.

Wasn't my car
 

But another member's. IIRC, there was an injector problem but I don't recall how many miles were on it.

On the case of injectors... what we used to do at my jobsite was take the pintle out and use a bench wire brush and polish it shiny, then ream the seat with the exact same pintle but some very very fine lapping compound it would work as if it were brand new.

I bought mine from DG and had them balanced by Gus at Pacific Fuel Injection - they were expensive and performance is good but I would still buy Monarks the next time for the other cars . . not convinced that they are that good -

Kermatdi I think sells the Bosios for less than DG.