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Looking for a good source to buy OM642 injectors

Old 02-07-2016, 06:09 PM
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2008 R320 CDI, 1987 560SL
Looking for a good source to buy OM642 injectors

Hi all,

I've got an injector on its way out - showing signs of the "black death".

I'm just wondering if anyone has found a good source to buy these that are both reasonably priced and trustworthy.

FYI, part #6420701387

Thanks in advance . . .
Old 02-07-2016, 08:59 PM
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Fortunately, the residue around the injector looks like it just started, so I might be able to get away with just replacing the seal.
Old 02-08-2016, 01:55 PM
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W211 320CDI -04, W210 270CDI -01
Yep, 'black death' itself means usually not replacement injector (only if broken when removing it... then nozzle cap holder could be cracked sometimes but spare part can be bought from bosch service).

Ebay.de is full of them, less than 100€ each... price is so cheap that it does not matter if one is not good (order 1-2 extra, you can always sell them again if they are good)

I have no personal experience but I have heard many have used this site:
http://www.robi-tec.de/

Also I have no idea about delivery costs to overseas...
Old 02-09-2016, 08:56 AM
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I didn't see any OM642 injectors on that site, but I did find another one on eBay. I think I'll buy one to have just in case.
Old 01-22-2017, 10:47 AM
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ML320 CDI 2008
fuel injector removal

did you manage to get it out, which Tools did you use? did you have to change the injector. I got the same problem on two injectors and I want to do it this week, thanks
Old 01-22-2017, 10:48 AM
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ML320 CDI 2008
On wis they say if you use a impact extractor the piezo has to be change.
Old 01-22-2017, 01:54 PM
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2008 R320 CDI, 1987 560SL
Injector rekival

Yes, I did get it removed. It was simple. The only special tool you need is a 17mm flare nut socket in order to be able to remove and tighten the fuel line on the injector. A regular flare nut wrench will not fit in there.
Old 01-22-2017, 03:09 PM
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thanks for the information. the one want to replace is cover of the melty foam sound reducer that they put around the injectors. to clean booths, it took me three hours. your are lucky that it was not stuck I hope mine will be the same.
Old 01-22-2017, 04:23 PM
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1922 Ford Model T / no OBD
I read somewhere a trick to loosen up frozen injectors.
It is a bit risky IMHO, so use it at your own risk, but I recall European member loosening the injector bolt 1 turn and taking it for short drive.
Old 01-22-2017, 04:50 PM
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Just warm the engine up and put some acetone around the injector. The injectors actually have a pretty sloppy fit in the bore. Mine came out super easy. I think I bookmarked an instructional video. I'll see if I can find it.
Old 02-13-2017, 01:00 PM
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I used an impact extractor on mine. They all came out very easily. I think I paid about $80USD for the tool.

I just used normal flare nut wrenches to get the hard lines off; very easy on the right side, but it was definitely tighter on the left. Still, they came off without issues.
Old 02-13-2017, 01:32 PM
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ML320 CDI 2008
I didn't took any chance and I bought those tools: injector remover, seal remover, manhole cleaner and a seat cutter set. mine is leaking since 2 years and I prefer to have the right tool than nothing it cost me around 350US for a 1.50$ seal ( I have to sur so far) but I will do all the six of them. in forums thatI read it was never my injector (the CDI bosh , pen
injector) may be those one are more easy to take off. here some picture of my tools.
to removed the seal if it stuck

To recut the seat if it damage

for removing injector for removing seal



Last edited by willlib; 02-13-2017 at 01:41 PM. Reason: pictures at the wrong place
Old 02-13-2017, 02:41 PM
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2008 R320 CDI, 1987 560SL
I thought about getting an extractor set like that also. Having removed an injector now, despite about a 1/4" of black death caked on there, I don't think this is really necessary. The injector came out with very little force - basically, you loosen off and fully unthread the screw that tightens down the hold-down finger on the injector, then you use the screw as a lever in the hold-down finger to pry up the injector.


Fast forward to 2:20 to see the removal of the the injectors.
Old 02-13-2017, 03:13 PM
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Look so easy on the video. nine injector are more like this one
I never saw a video where they removed this kind of injectors
Old 02-13-2017, 03:52 PM
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Yes, those injectors are slightly different than the OM642 injectors, but the procedure is the same.
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