I was surgically clean and wore the surgical gloves. The O rings were bad. I washed each valve body in Brakleen priot to reinstall and springs too. I must say it was tough to get a couple reinstalled and I took out the little metal cylinders and parts under the valve body to line them up and reinstalled them. I'll get new rings etc and take it apart again.
steve

When re-installing my delivery valves I put a very small amount of white lithium grease on the crush washers and end of the spring to hold them in place while I re-installed them. It's not something I read about specifically relating to this job but often find that when you need to provide just a little hold the grease works well and as soon as the fuel starts going through I am sure it disolves and got pushed through the injectors.

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Marty D.

2013 C300 4Matic
1984 BMW 733i
2013 Lincoln MKz

How 'deep' did you go into the delivery valves assembly to realign the valve springs and crush washers? There is a fuel metering device underneath the delivery valve (107) that turns via the control plunger (113) that must align exactly correct.

I'd take Matt's advice and figure out which cylinder is giving you problems and hope a DP will fix it if it is a contamination.

Attached Thumbnails

 

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Scott C.

2006 E320 CDI (120k miles)
FOR SALE: 1998 E300 Turbo Diesel - Black w/Tan Leather - Euro delivery (236k miles)

I changed the o ring and the copper washer but took out the whole assembly. The cylindrical part at the base was removed, cleaned and reassembled. What orientation does the cylinder go in? It has some holes in it I saw and I thought it turned freely. I'll try the white lithium grease on the parts next time to reassemble it. I removed #'s 98, 95, 101, 104 and 122 from the delivery valve on the above thumbnail diagram.
Thanks for your help
steve

Is (98) in the diagram, the O-Ring that needs replacement? From the diagram, the pump looks to be the same as the '96 E300. Do /should all the parts need to be removed (cleaned?) to replace the O-Ring?

Yes that's the o ring. I'll work on it this weekend. I must have put in the spring crooked or something. You remove the part 95 and replace the o ring and crush washer.

Only remove 95 splined valve holder, 98 o-ring, 101 spring and 104 crush washer.

Everything below that point should be left undistrubed.

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Terry Allison
N. Calif. & Boca Chica, Panama

09' E320 Bluetec 77k (USA)
09' Hyundai Santa Fe Diesel 48k (S.A.)

Based on the fact that you removed all the way down to #122, the odds are fairly high that you've misaligned something. The valve controls the quantity of the fuel by precise height and rotation of the pump plunger (which I believe is the component between #107 and #113). There is an annular grove in the pump plunger that should be pointed away from the fuel control hole in the side of the bore when the engine is off.

This design has been pretty standard design for a long time now so the 603 & 617 guys might be of some help on this one. They might steer clear of any topic with 'W210' in it so you might have to repost a pointer to this one.

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Scott C.

2006 E320 CDI (120k miles)
FOR SALE: 1998 E300 Turbo Diesel - Black w/Tan Leather - Euro delivery (236k miles)

Thanks for the advice. I'll pull it apart tonite and try to figure it out. Is the correct orientation listed in WIS?
Steve