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  #1  
Old 10-22-2006, 02:06 PM
C Sean Watts's Avatar
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Very interesting take on "rebuilt" injectors..

Anyone read the description care to hold forth?

http://cgi.ebay.com/ebaymotors/Mercedes-W123-300D-W126-SD-turbo-diesel-fuel-injectors_W0QQitemZ270040867727QQihZ017QQcategoryZ33554QQrdZ1QQcmdZViewItem

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  #2  
Old 10-22-2006, 02:19 PM
ForcedInduction
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Up for sale VIA buy it now is 5 Mercedes W123 W126 turbo diesel fuel injectors and a installation kit which includes heat shields OEM cloth fuel return line and an installation manual so you will get them installed correctly this installation kit cost $30 however I include it and shipping for one low buy it now price of $130.00 with a 30 day money back guarantee so you have plenty of time to have them independently tested which most BOSCH service centers will do for free or nearly free. These are the correct diesel fuel injectors for the 1982 to 1985 Mercedes W123 or 1981 to 1985 W126 300SD 5 cylinder turbo diesel engines. They have been ultrasonically cleaned using an industrial cleaner and aqua solution designed specifically for cleaning diesel injectors. All 5 have passed all bench tests required by BOSCH and Mercedes with results much closer to new than to used and test better than that required of a freshly rebuilt set. They pop between 135bar and 137bar. Included is enough OEM fuel return line to replace yours the correct end of line plug for the last injector and 5 new heat shields which are also crush washers therefore the must not be reused under any circumstance except to drive to the dealer to buy a replacement and change it in the dealers parking lot. If that is unclear reusing the heat shield will destroy your injector buy allowing hot combustion gasses to enter the precision valve enclosed in the virtually indestructible housing designated a KCA injector body . There is a fair amount of wrong information on eBay about these injectors like they work in W116 300SD wrong So I jotted a little information about the workings and testing of injectors first being a DYIR you may have tried disassembling cleaning and testing your present set of injectors using that nice equipment you bought off EBay of course there are no instructions for the equipment sold on eBay or any where this is simply because BOSCH charges a great amount of money for this information. So you are confused your injectors work worse after you carefully cleaned them following the little bit of instructions from MBZ.org or other net sources this is directed at those poor soles that have taken this path I bet it would have helped you a whole lot if you knew the pintal does not rotate in the seat. It just moves in and out wearing a sweet spot so when you put it back together your odds of having the pintal rotated so the wear in the nozzle matched the wear in the seat wear about 0 Mercedes recommends using the BOSCH cleaning kit with the appropriate size pin to clean out the pintal hole. Guess what that is not how BOSCH or any injector shop does it you can spend hours of trial and error trying to get the sweet spot lined up again not to mention pulling all your hair out. The way it is really done is with an ultrasonic cleaner KENT MORE tools is the major manufacturer of these. You dissemble the injector removing the nozzle assembly then with out rotating the pintal you pull it away from the seat set them in the cleaner tray and let the magic of ultrasonic cleaning remove all the carbon microscopically clean. Ultrasonic cleaners are truly amazing when used with the correct cleaning solution for the job. Some shops use very fine diamond lapping compound to reface the seats this is not recommend by Mercedes and I do not do it if cleaning does not do the job in the trash it goes., I strongly recommend you get any injectors you buy for your car tested by an authorized BOSCH service center If you buy so called new injectors there actually rebuilt in 2002 BOSCH took all there manufacturing out of Europe and have had a terrible time making decent rebuild parts you would be nuts at this time to put those in your car with out having them tested the reported failure rate is still around 2 out of 5. There are some aftermarket companies coming on line such as bozzoi which hold some promise. If you just need an injector to replace a knocking one email me I have a few single Mercedes turbo diesel injectors If you have any questions ask away even if your trying to fix your own and need advice feel free to ask. Some injector information do remember the injector is only one part of the fuel atomization the pre-chamber ball is as important and the installation instructions explain how to check this key part. The W123 injector is a center hole pintle nozzle sometimes called an ‘anti-knock’ nozzle injector. When ejection pressure is reached the needle is lifted against the spring releasing and atomizing fuel in a series of rapid pulses giving a characteristic ‘buzz’ as the needle opens and closes. The initial pulse comes through the 0,20mmØ pintle jet followed by the main charge releasing around the pintle and through the jet. Spray quality or degree of atomization this is really the bottom line for the injector’s serviceability and performance and the key to this is exclusively the condition of the nozzle needle seating and the pintle jet. Held at 90% of the ejection pressure there must be no sign of any seepage at the pintle. Assessing the spray quality is subjective and there lies the problem for a DIY’er you can’t learn from a book what the proper spray looks like or judge weather the buzz or chatter sounds right you need to be taught this by an expert in the field and with experience once you have been shown all the variables that come into play when judging chatter and spray quailty Leak-off is measured by pressurizing the injector to 90% of ejection pressure and then isolating it from the test pump. The time taken in seconds for the pressure to drop 20bar is recorded for comparison. Mismatched leak-off has exactly the same effect as a pump out of calibration What is referred to as pop pressure is the pressure measured in bar that fuel starts to spray past the pintal this is adjusted by special shims which are hardened through to 58 Rockwell and no substitute soft material may be used these shims are ground to the right thickness starting from the few standard thickness sizes available from BOSCH at least ten percent of all used injectors I come across have soft metal shims which are totally unacceptable Finally the right injector must be used for each application there are a lot of BOSCH KCA injectors that look just like the Mercedes injectors and even have the same pop pressure measured in bar that while they look open at the same pressure the internals are not the same and as an example the the W116 300SD turbo diesel injector seems to be the same as the Mercedes W123 turbo diesel injector they have a different angle of spray and are not interchangeable. The Mercedes BOSCH injector housing is known as a KCA housing and holds many manufacturers different pintal and seats that are totally incorrect for the Mercedes W123 even though the housing and pop pressure is the same they are not compatible that is not to say your car wont start and run in some cases much smoother and quieter than with the correct injector but you will have a loss or increase in performance a loss or increase in MPG plus small problems like coking your rings burning the pre combustion chambers expensive stuff like that. Finally any one that says the chatter test does not apply to the injectors made since 1976 must be selling untested junk yard injectors because they sure don’t know how to test them. Here are a couple of my almost 75 sets of injectors sold on EBay feedbacks I just have not and no longer will be doing it due to health concern shortly I will be selling all my equipment and parts including two BOSH test stations 2 industrial ultrasonic cleaners and if some one is interested lots of injectors that need to be cleaned lapped with a few hundred hardened washers. Here are a couple of feed backs. I can not say enough good about this ebayer. Highly recommended. Thank you! Buyer rock-ur-world ( 33 ) Oct-06-06 18:58 270034747416 AAA+++ ONE OF THE BEST I HAVE EVER DEALT WITH. TRUE ASSET TO EBAY! Buyer kdh333 ( 30 ) Dec-03-05 15:14 8011243408 Reply by davesidlauskas: Thank you very much another set of great injectors finds a good home Dec-03-05 15:48 Item better than listed very very happy will buy again thank you !!!!!! Buyer jeo25blue ( 78 ) Dec-19-05 16:58 8019905281 Reply by davesidlauskas: Your welcome he got a tested good set of Mercedes diesel fuel injectors The best customer service to date on E-BAY outstanding Buyer winn-winn ( 84 ) I have put some spare parts in the box that may come in handy one day. Thanks Dave S Dave S


EDIT: Notice the different injector bodies.
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  #3  
Old 10-22-2006, 03:15 PM
dkveuro's Avatar
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Not an English major either ! Let's hope the injectors perform better.

If you think a major in English is of no consequence, check out those who have one.

( Being as this thread is heading towards the record for longest post on any thread..without punctuation...(( except Botnst...that is ))................. )

As might be expected, a large number of writers hold degrees in English. The list includes

Douglas Adams: SciFi writer; wrote Hitchhiker's Guide to the Galaxy series; Dirk Gently series
Gwendolyn Brooks: poems include "We Real Cool"
Tom Clancy: suspense writer; Clear and Present Danger
Allen Ginsberg: Beat Generation poet; poems include Howl
Joseph Heller: author of Catch-22
David Henry Hwang: author of Madame Butterfly
Stephen King: extraordinarily successful and prolific author of horror fiction; writings range from Carrie through The Green Mile and The Stand to the short story on which the movie "Stand by Me" is based
Bobbie Ann Mason: short story writer; collections include Shiloh
Arthur Miller: playwright most noted for Death of a Salesman and The Crucible
Toni Morrison: author of Beloved
Joyce Carol Oates: prolific author
Philip Roth: esteemed Jewish author
Amy Tan: author of The Joy Luck Club
John Updike: most noted for the "Rabbit" books, from Run, Rabbit, Run to Rabbit at Rest
Eudora Welty: highly esteemed southern author

Then there are those who have majored in English who have made non-traditional use of their degrees, including

Russell Baker: journalist
Dave Barry: humorist, writer, actor
Linda Bloodworth-Thomason: television writer/producer (Designing Women, Evening Shade)
Carol Browner: former Head of the Environmental Protection Agency
Chevy Chase: comedian, actor, writer
Mario Cuomo: former Governor of New York
John Cuzack: actor
David Duchovny: actor
Michael Eisner: former Walt Disney CEO
Jodie Foster: actor, filmmaker
Kathryn Fuller: World Wildlife Fund CEO
Cathy Guisewite: cartoonist (Cathy)
Famke Janssen: actor
Tommy Lee Jones: actor
Kris Kristofferson: songwriter, actor
Michael Lynne: Co-Chairman and Co-CEO of New Line Cinema
Paul Newman: actor, food entrepreneur
Joe Paterno: football coach (Penn State University)
Sally Ride: astronaut
Joan Rivers: comedienne
Diane Sawyer: broadcast journalist
Herb Scannell: President, Nickolodeon Networks, MTV Networks Group President
Paul Simon: songwriter, singer
Steven Spielberg: filmmaker
Marty Schottenheimer: Coach of San Diego Chargers
Christopher Reeve: late actor, activist for the disabled
Clarence Thomas: U.S. Supreme Court Justice
Emma Thompson: actor
Grant Tinker: TV Executive and Producer
Harold Varmus: Nobel laureate in medicine, former Director of National Institutes of Health
Barbara Walters: broadcast journalist
Sigourney Weaver: actor
Pete Wilson: former Governor of California
Bob Woodward: journalist, wrote All the President's Men
Renee Zellweger: actor



.
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  #4  
Old 10-22-2006, 06:16 PM
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How many of the English majors above change their own oil?
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  #5  
Old 10-22-2006, 06:22 PM
deniss's Avatar
'84 300SD W126/OM617
 
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Those different-looking injector bodies make me wonder! Is that OK that they seem to have different body lengths and on some slightly different thread lengths, or is that suspect of something here?
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  #6  
Old 10-22-2006, 07:16 PM
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Quote:
Originally Posted by ForcedInduction View Post
There is a fair amount of wrong information on eBay about these injectors like they work in W116 300SD. wrong. ...CUT...
while they look open at the same pressure the internals are not the same and as an example the the W116 300SD turbo diesel injector seems to be the same as the Mercedes W123 turbo diesel injector they have a different angle of spray and are not interchangeable.

Really?
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  #7  
Old 10-22-2006, 07:20 PM
ForcedInduction
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Quote:
Originally Posted by bgkast View Post
Really?

AFAIK, no.
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  #8  
Old 10-22-2006, 07:23 PM
bgkast's Avatar
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116 and 126 SD injectors have the same part #.

This guy is a moron. I would not let somebody who can not write a complete sentence touch injectors for my car.
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1982 300SD - 232K miles - Wife's Daily Driver

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  #9  
Old 10-22-2006, 07:38 PM
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Quote:
Originally Posted by bgkast View Post
116 and 126 SD injectors have the same part #.

This guy is a moron. I would not let somebody who can not write a complete sentence touch injectors for my car.


But there is always some fool on ebay.
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  #10  
Old 10-22-2006, 09:30 PM
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What, in God's good name, does good punctuation and grammar have to do with a man's ability to rebuild injectors? I certainly would rather have a mechanic that knows his work and does it well than one that can spout Shakespeare and write like Keats. I am dyslexic and a hopeless speller but I can do quite good mechanics, welding, fitting, etc., etc. And I'm a pretty nice guy on top of it. And modest too.
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  #11  
Old 10-22-2006, 09:33 PM
TheDon's Avatar
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my injectors all say rebuilt on them and they are all the same height
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  #12  
Old 10-22-2006, 10:20 PM
deniss's Avatar
'84 300SD W126/OM617
 
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I wrote to this seller and asked him about why the injectors have different lengths, and this was his reply:

"The two injectors that have shorter bodies are remanufactured; in this process sometimes the ends of the injectors are ground down. It has no effect on the injectors."
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  #13  
Old 10-22-2006, 10:37 PM
ForcedInduction
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Quote:
Originally Posted by deniss View Post
I wrote to this seller and asked him about why the injectors have different lengths, and this was his reply:

"The two injectors that have shorter bodies are remanufactured; in this process sometimes the ends of the injectors are ground down. It has no effect on the injectors."
How would that explain the longer lower body?
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  #14  
Old 10-22-2006, 10:53 PM
deniss's Avatar
'84 300SD W126/OM617
 
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Quote:
Originally Posted by ForcedInduction View Post
How would that explain the longer lower body?
Yea, it's totally bogus.
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  #15  
Old 10-22-2006, 11:32 PM
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I don't understand, is forced induction selling these injectors on ebay then? how much for a set off ebay? what about the 116 sd story, the engine is the same I thought? why different injectors?

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