injector pump troubles - Mercedes-Benz Forum

 
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post #1 of 8 (permalink) Old 05-09-2005, 02:17 AM
AMSOIL300CDT
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injector pump troubles

on the 72 220 D custom turbodiesel 4 cyl, what would anyones opinion be as to why the injector pump only sends fuel to two lines out of 4? the car hasnt been run apparently in like 12 years. i wanted to ask before i start wasting more time with it. could it be dirty? or rebuilt? the older owner is a retired jet mechanic, so he wanted to rebuild it himself, and i said i dont know if that would be worthwhile or possible, or anything. anyways, what do u guys think?
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post #2 of 8 (permalink) Old 05-11-2005, 04:05 PM
KCM
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RE: injector pump troubles

This is a shot in the dark, but I believe that model pump has nipples for each cylinder that screw out of the pump. There is a spring-loaded valve in there. Maybe the valve is stuck from sitting so many years and needs to be de-gummed.
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post #3 of 8 (permalink) Old 05-31-2005, 12:17 AM
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RE: injector pump troubles

will have to check on that........never took the lines all the way off, just loosening. well, will post if it helps. any more suggestions would be nice
post #4 of 8 (permalink) Old 05-31-2005, 09:09 AM
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RE: injector pump troubles

It's common for Bosch injector pumps to gum up if they are stored for a significant time without being purged of diesel. There are a number of places they could clog.

If you have ruled out the injectors themselves, start by removing the high pressure valves on the pupm itself and then work your way in. Be careful of all the springs and parts - there is a nightmare awaiting inside the pump [:D]

Maybe you could rig up a fixture and run light oil or kerosene through it for a while - beware of high pressure output - it can be deadly.

Or, if you want it rescued, take it to the nearest Bosch service center and pay the man.

1978 Mog 416.141 DoKa
1971 W113 280SL
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post #5 of 8 (permalink) Old 06-01-2005, 11:18 PM
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RE: injector pump troubles

i didnt know that they even have Bosch-Kundendienst places in the us. ill have to look them up and see if they exist. will update once i know more
post #6 of 8 (permalink) Old 06-08-2005, 11:03 AM
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RE: injector pump troubles

If you are in need of a certified Bosch IP rebuilder, please contact me. Having worked for this fellow for a few years I can say without any doubt that his work is impeccable and peformed to the highest standard. He has all of the necessary test and calibration equipment and is a degreed mechanical engineer. As a testament to his quality, he builds pumps for all of the top notch restoration houses (Paul Russell, Scott Grundfor, etc.). He does not deal with the retail public as of late due to overwhelming work loads, but will do pumps and injectors for me due to our relationship over the past 12 or so years.

Regards,

Mathieu J. Cama
Old World Automotive
Vintage Mercedes Repair and Mechanical Restoration
Serving the Mercedes community since 1986
Lawrenceville, GA
cama@oldworldauto.com

1961 Unimog 404S
1965 190c
1967 250s (for sale)
1970 280sl
1970 280se
1971 280se 5 speed
1978 280slc 4 speed
1982 280te
1982 300sd
1983 300sd
1983 240d 3.0 4 speed
1984 300d 5 speed (sold)
1985 500sel Euro w/ hydromat
1986 190e 2.3-16
1989 560sec AMG
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post #7 of 8 (permalink) Old 06-08-2005, 12:17 PM
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RE: injector pump troubles

what do u think it would cost to have the pump gone over by someone, if it's sent in?????
post #8 of 8 (permalink) Old 06-08-2005, 01:43 PM
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RE: injector pump troubles

This is just a guesstimate, the price could be higher or lower, but I figure it should run between $700-1000 based on my experiences for a 4 cyl diesel. The price will vary pending the condition of the pump housing, the cam, etc. Certain parts are part of the rebuild, but parts such as the cam are generally re-used or replaced if no longer useable.

There are folks out there who charge less, but a number of them cut corners in their work. When I worked for this fellow it would be amazing how many freshly rebuilt pumps from other "reputable" shops that would show up to be set right. You get what you pay for.

Regards,

Mathieu J. Cama
Old World Automotive
Vintage Mercedes Repair and Mechanical Restoration
Serving the Mercedes community since 1986
Lawrenceville, GA
cama@oldworldauto.com

1961 Unimog 404S
1965 190c
1967 250s (for sale)
1970 280sl
1970 280se
1971 280se 5 speed
1978 280slc 4 speed
1982 280te
1982 300sd
1983 300sd
1983 240d 3.0 4 speed
1984 300d 5 speed (sold)
1985 500sel Euro w/ hydromat
1986 190e 2.3-16
1989 560sec AMG
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