Mercedes 220SEb injection timing - Mercedes-Benz Forum

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post #1 of 4 (permalink) Old 05-05-2012, 04:43 AM Thread Starter
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Mercedes 220SEb injection timing

Hello everyone out there, I'm looking for a little help. I'm currantly rebuilding a 220SEb, and I'm putting the injection pump unit back on the engine. Is there a method of "timing" up the pump unit so it pumps/injects to the right injector/cyclinder. I can not seem to see any obvios timing marks?? So does it need timing? or does it just pump and the draw of the cylinder open the injector?????

Any help would be great.
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post #2 of 4 (permalink) Old 05-05-2012, 06:51 AM
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Do you have the Mercedes shop manual? If not, I can download the pages on the injection pump.
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post #3 of 4 (permalink) Old 05-05-2012, 04:41 PM
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There is really no need to time the injection pump. There are only two plungers, one for the front 3 cyls and one for the rear 3 cyls. Also, it's port injection not direct injection like the 300SL or a diesel. Some may tell you there is a need to time the pump but it's really not necessary, even for the 6 plunger pump or the 8 plunger of the M100.

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post #4 of 4 (permalink) Old 05-08-2012, 02:27 AM Thread Starter
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Ok, so if you don't have to time the pump, How do the injectors know when in the duration to inject??
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