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  #1  
Old 06-25-2008, 01:21 AM
yoterbenz's Avatar
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bozio nozzles

While in Iraq I did some forum searching and learned of the "famed" Bozio nozzles. Seems that most like em and some don't. Overrated perhaps? Maybe they are, but I went ahead and purchased them anyways.



I've also read that some prefer to have the injectors pop tested and adjusted. Some say it doesn't matter. Again I took the route to have them professionally installed and pop tested. In my opinion it's better to let a professional diesel shop perform the nozzle install and pop test.



While browsing forums I found a post where a guy in my area took his injectors and nozzles to a place called H&H diesel. So yesterday I decided to give them a call and see what kind of turn around and prices they charged. Their rate seemed fair at 25 dollars per injector and next day pick up. Shortly after the phone call I dropped them off and picked up this afternoon.



The gentleman who helped me had an interesting bit of information. For starters he said that the old nozzles had very little wear. I did not know the condition of those nozzles because I bought the injectors used on EBAY. He also told me that the new nozzles had a very very good spray pattern. That suprised me since these people replace nozzles on all sorts of injectors. In fact he told me to stop by and tell him how the new nozzles performed after I install the injectors. He had never heard of Bozio before but was impressed.



Here are a few pics of what I got back. Cleaned, lubed, and packaged injectors! They also threw in a set of heat shields! One might think they were new. From the looks of it the old nozzles are German made ones. I'm not sure if the Bosch nozzles made in other counties other than Germany have Germany printed on them, but these ones do. This leads me to believe that they were manufactured there.



When I install these I'm also going to adjust the valves at the same time. I figure I can knock two birds with one stone. This will be the last engine work I do to the ol OM616. Since there is no turbo to tweak with that's about the only thing I can do besides routine maintenance. Right now I'm averaging about 30 MPG and once I get these nice injectors installed and the valves adjusted, I'll post my results



The last pic is of the Fitch Fuel Catalyst I installed a few weeks ago. So far I'm impressed with it and the engine runs smoother with an improvement in fuel economy.

Attached Thumbnails
bozio nozzles-afterh-h.jpg   bozio nozzles-original_bosch.jpg   bozio nozzles-fitch_fuel_catalyst.jpg  
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  #2  
Old 06-25-2008, 01:43 AM
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Quote:
Originally Posted by yoterbenz View Post
While in Iraq I did some forum searching and learned of the "famed" Bozio nozzles. Seems that most like em and some don't. Overrated perhaps? Maybe they are, but I went ahead and purchased them anyways.



I've also read that some prefer to have the injectors pop tested and adjusted. Some say it doesn't matter. Again I took the route to have them professionally installed and pop tested. In my opinion it's better to let a professional diesel shop perform the nozzle install and pop test.



While browsing forums I found a post where a guy in my area took his injectors and nozzles to a place called H&H diesel. So yesterday I decided to give them a call and see what kind of turn around and prices they charged. Their rate seemed fair at 25 dollars per injector and next day pick up. Shortly after the phone call I dropped them off and picked up this afternoon.



The gentleman who helped me had an interesting bit of information. For starters he said that the old nozzles had very little wear. I did not know the condition of those nozzles because I bought the injectors used on EBAY. He also told me that the new nozzles had a very very good spray pattern. That suprised me since these people replace nozzles on all sorts of injectors. In fact he told me to stop by and tell him how the new nozzles performed after I install the injectors. He had never heard of Bozio before but was impressed.



Here are a few pics of what I got back. Cleaned, lubed, and packaged injectors! They also threw in a set of heat shields! One might think they were new. From the looks of it the old nozzles are German made ones. I'm not sure if the Bosch nozzles made in other counties other than Germany have Germany printed on them, but these ones do. This leads me to believe that they were manufactured there.



When I install these I'm also going to adjust the valves at the same time. I figure I can knock two birds with one stone. This will be the last engine work I do to the ol OM616. Since there is no turbo to tweak with that's about the only thing I can do besides routine maintenance. Right now I'm averaging about 30 MPG and once I get these nice injectors installed and the valves adjusted, I'll post my results



The last pic is of the Fitch Fuel Catalyst I installed a few weeks ago. So far I'm impressed with it and the engine runs smoother with an improvement in fuel economy.
Reminds me of when i used to work for my old job, i used to pop test injectors all day and shim when necessary. Those look great, what does the fitch catalyst do?
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  #3  
Old 06-25-2008, 07:29 AM
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I just had my Bosios pop tested after about 5k miles. The shop said they sprayed a little wide. But I'm not sure how qualified the guy was. He said that getting them within 5 bar was close to impossible for them. He said they balance to within 100psi.
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  #4  
Old 06-25-2008, 07:51 AM
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Quote:
Originally Posted by 777funk View Post
...But I'm not sure how qualified the guy was. He said that getting them within 5 bar was close to impossible for them. He said they balance to within 100psi.
Well at least it doesn't seem like the guy knows what a "bar" is.... 5 bar = 73 psi
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  #5  
Old 06-25-2008, 04:41 PM
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I guess I will repeat whad Cervan said as it looks like they did a Class A job on the injectors. And, what does the fFtch Catalyst do?

Also, please get a magnifying glass and see if there is a central hole drilled down the center if the pintle (15) tip and pull one pintel out and see if there is a hole cross drilled across the pintel (14). On my set of injectors and another set that I pulled from another car those little holes were completely plugged. Please see pic.
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  #6  
Old 06-25-2008, 05:25 PM
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An important thing to note on nozzles for OM616 and OM617 is that the central hole in the pintle provides a pilot injection. This helps reduce soot and improve power. Over the years Mercedes enlarged the central hole and increased power. If the replacement nozzles don't have this hole you aren't going to get out as much power as you can with correct nozzles.
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Old 06-25-2008, 06:14 PM
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AFAIK that center hole is only used for these old engines. Post OM617 engines don't use it.

I'm glad to hear the Bosios have a nice spray pattern. I wasn't able to test mine before installation because my pop tester broke.
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  #8  
Old 06-25-2008, 06:27 PM
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really what is a Fitch Fuel Catalyst??? I hearing Good's and bad's....
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  #9  
Old 06-25-2008, 06:29 PM
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Quote:
Originally Posted by DieselAddict View Post
AFAIK that center hole is only used for these old engines. Post OM617 engines don't use it.
That is correct. However I would be very interested to find out how these center hole nozzles worked in a newer engine. I speculate that the switch to the non center hole nozzles was an economic decision.
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  #10  
Old 06-25-2008, 06:54 PM
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Quote:
Originally Posted by ConnClark View Post
That is correct. However I would be very interested to find out how these center hole nozzles worked in a newer engine. I speculate that the switch to the non center hole nozzles was an economic decision.
Actually in my ex 87 300D I experimented with the Bosch 240/ nozzles which are for the OM616/7 engines. There wasn't much difference. Slightly quieter but more smoke. I don't miss the hole. It gets clogged easily.
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  #11  
Old 06-25-2008, 07:05 PM
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Quote:
Originally Posted by DieselAddict View Post
AFAIK that center hole is only used for these old engines. Post OM617 engines don't use it.

I'm glad to hear the Bosios have a nice spray pattern. I wasn't able to test mine before installation because my pop tester broke.
I am replacing my French ones with Bosio units. I checked the French OEM ones and they didn't have any center holes. I know they were original because I got the car at 50K and it was never changed.
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  #12  
Old 06-26-2008, 12:13 AM
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Quote:
Originally Posted by ConnClark View Post
An important thing to note on nozzles for OM616 and OM617 is that the central hole in the pintle provides a pilot injection. This helps reduce soot and improve power. Over the years Mercedes enlarged the central hole and increased power. If the replacement nozzles don't have this hole you aren't going to get out as much power as you can with correct nozzles.
I have my own theory. I believe they increased the size of the drilled hole because the smaller holes were plugging up too soon. The newer nozzles have a Facet (flat spot) on the side of the Pintel that serves the same function (as do Monark Nozzles) and is less pron to carbon buildup.
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Old 06-26-2008, 02:51 PM
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Nozzle Basics

The Original 'type' nozzle as fitted in the late 60's for the 615/6 series engines was the DNOSD220

This was a 'straight' pintle nozzle, and No Hole....

The central-hole Pintle nozzle is the DNOSD240/ type. They didn't alter the size of the pilot-injection hole in the 240/ nozzle at any time--If they did, It wouldn't be a 240/ nozzle anymore!

I have seen loads of these 240/ nozzles, many very old, and some newer and I have Never seen one with a blocked hole!!

The '240/ nozzle was developed to reduce Noise, 'Diesel-Knock' and smoother idling over the '220 nozzle, and is recommended as a replacement for any M.B. vehicle using the earlier DNOSD220 nozzle where complaints of excessive Noise were found...

The later nozzles like the DNOSD261 and DNOSD265 use a different technology to achieve the same thing,-- And More...

These later types are known as Throttling-Pintle nozzles. The flat-cut on the side of the pintle-needle can be tailored for different amounts of fuel delivery at given lifts, meaning that Torque can be altered due to fuel delivery Rates by changing the 'slope' and width/angle of the side-cut flat on the pintle needle....

These later nozzles are more sensitive to mis-adjustments in their 'pop' pressures, due to their 'throttling' nature....

There would be no advantage to be gained by replacing a later type '261 or 265 nozzle with the 240/ type.....
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  #14  
Old 06-26-2008, 03:35 PM
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Quote:
Originally Posted by Alastair View Post
The Original 'type' nozzle as fitted in the late 60's for the 615/6 series engines was the DNOSD220

This was a 'straight' pintle nozzle, and No Hole....

The central-hole Pintle nozzle is the DNOSD240/ type. They didn't alter the size of the pilot-injection hole in the 240/ nozzle at any time--If they did, It wouldn't be a 240/ nozzle anymore!

I have seen loads of these 240/ nozzles, many very old, and some newer and I have Never seen one with a blocked hole!!

The '240/ nozzle was developed to reduce Noise, 'Diesel-Knock' and smoother idling over the '220 nozzle, and is recommended as a replacement for any M.B. vehicle using the earlier DNOSD220 nozzle where complaints of excessive Noise were found...

The later nozzles like the DNOSD261 and DNOSD265 use a different technology to achieve the same thing,-- And More...

These later types are known as Throttling-Pintle nozzles. The flat-cut on the side of the pintle-needle can be tailored for different amounts of fuel delivery at given lifts, meaning that Torque can be altered due to fuel delivery Rates by changing the 'slope' and width/angle of the side-cut flat on the pintle needle....

These later nozzles are more sensitive to mis-adjustments in their 'pop' pressures, due to their 'throttling' nature....

There would be no advantage to be gained by replacing a later type '261 or 265 nozzle with the 240/ type.....
I was going by what I read on this page (I will put belog the text) concerning the nozzle numbers and the notes. What I got from it was that a DNO SD 240 has a central hole of 0.15mm. When the increased the central hole size to 0.20mm the added the (/) to the end and the number
became DNO SD 240/.
As far as nozzle plugged or not plugged; each persons experiences are different.
The last set of injectors I pulled from the Junk Yard came out of a 82 300SD. When I pop tested them 4 out of 5 seemed good until I looked and saw that the central holes were plugged. It may simply be that the car was neglected and I believe it had close to 300,000 miles on it. I think that if you do that Diesel Purge ounce in a while it would keep the holes clean.
Another comment is that the instructions on cleaning the nozzles shows using special tiny wires to clean out the holes so the holes must get something inside of them.
Here is the tech info top section of the first page:
http://www.pauldrayton.com/uploadfiles/merc/Service/W123/w123CD2/Program/Engine/617/07_1-135.pdf
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  #15  
Old 06-26-2008, 03:44 PM
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I wouldn't be in too much of a hurry to get one:

http://askville.amazon.com/fitch-fuel-catalyst-work/AnswerViewer.do?requestId=4602986

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