Bosio injector nozzles - PeachParts Mercedes-Benz Forum

turbobenz · #1 12-08-2007, 09:21 PM

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.

pawoSD · #2 12-08-2007, 09:43 PM

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.

C Sean Watts · #3 12-08-2007, 09:56 PM

Quote:

Originally Posted by turbobenz

I heard its a good idea to replace them every 100k.

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.

educate them · #4 12-08-2007, 10:51 PM

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

Diesel911 · #5 12-08-2007, 11:14 PM

Quote:

Originally Posted by turbobenz

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.

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

Mustang_man298 · #6 12-08-2007, 11:16 PM

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?

turbobenz · #7 12-09-2007, 12:18 AM

Quote:

Originally Posted by C Sean Watts

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.

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?

C Sean Watts · #8 12-09-2007, 02:32 PM

Quote:

Originally Posted by Mustang_man298

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?

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.

C Sean Watts · #9 12-09-2007, 02:48 PM

Quote:

Originally Posted by turbobenz

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?

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.

C Sean Watts · #10 12-09-2007, 02:54 PM

Quote:

Originally Posted by Diesel911

The Monark nozzles. That the other member used can be as low as $23 I only found to parts places on the internet that sell them.

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

C Sean Watts · #11 12-09-2007, 03:14 PM

Quote:

Originally Posted by educate them

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

I would have a look at these...

http://www.peachparts.com/shopforum/attachments/diesel-discussion/38670d1164899527-different-type-prechambers-prechamber4.jpg

and the other

http://www.peachparts.com/shopforum/attachments/diesel-discussion/38669d1164899014-different-type-prechambers-prechamber2.jpg

MayorDJQ · #12 12-09-2007, 06:18 PM

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.

pawoSD · #13 12-09-2007, 06:22 PM

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

oldiesel · #14 12-09-2007, 06:52 PM

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

Diesel911 · #15 12-09-2007, 07:53 PM

Quote:

Originally Posted by Mustang_man298

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?

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.