Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help

Go Back   PeachParts Mercedes ShopForum > Technical Information and Support > Tech Help

LinkBack Thread Tools Display Modes
Old 10-26-2001, 11:49 PM
RunningTooHot's Avatar
Registered User
Join Date: Aug 2000
Location: Here
Posts: 832
Fuel column “leak down” & Injection Pump element check valves - replacement procedure

I have been reading through the archives regarding replacement of the seals in the injection pump delivery elements. Steve Brotherton has made several postings regarding the symptoms related to faulty check valves seals, but there is very little information as to how to actually replace them.

In one posting there is a reference to a special socket to torque them down. In another posting there was a statement that the elements cannot be removed (except by a shop) from pumps that have "external fuel correction" capabilities.

My car is a 1984 300D -- do these pumps have external fuel correction? Is there really need for special socket to torque them down? If so, where could I obtain or rent one?

Has anyone actually done this themselves? If you could please post some helpful hints on how to do it, I would greatly appreciate it!

Thanks in advance!

Reply With Quote
Old 10-27-2001, 09:20 AM
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
The OM 601/602/603 engines are the ones that need a "special" socket.
On the OM617 engines the only thing you DON'T want to do is remove the 2 13mm nuts on either side of the delivery valve. This is the external fuel adjustment.
Most of this type of work isn't really DIYER!!!
MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator
Reply With Quote
Old 10-27-2001, 02:31 PM
RunningTooHot's Avatar
Registered User
Join Date: Aug 2000
Location: Here
Posts: 832
Smile 1000 Thank Yous!


I was a bit concerned that wouldn't receive any responses to my inquiry due to its somewhat esoteric nature.

I fully comprehend your warning regarding this not being a typical DIY job. I really hate to even say this (because it sounds so arrogant when written in text), but I believe that am quite up the task. I am not deluding myself regarding my capabilities; this is just the first diesel that I've ever owned and I'm still on the steep end of the learning curve. Of course, the learning is the fun part -- the bloody knuckles are another story.

I hate to impose upon you, but could you please help me with just two questions?

1. Is the sealing ring that develops leakage the one that goes underneath the delivery valve holder, or is there another internal (within the delivery valve itself) seal that needs to be replaced?

2. Would it be more prudent to replace the delivery valves as a unit (if they're available) or would that be an unnecessary expense & overkill?

Thank you once again -- your help is Greatly appreciated!

Reply With Quote


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
Fuel column “leak down” & Injection Pump element check valves - replacement procedure RunningTooHot Diesel Discussion 1 10-27-2001 02:50 PM
Fuel Trim? OBDII duty cycle, CHECK ENGINE ? ke6dcj Performance Paddock 1 08-07-2001 10:21 PM
Fuel Trim? OBDII cycle and CHECK ENGINE ? ke6dcj Tech Help 1 08-06-2001 08:54 AM
80 300D 225500 miles Dan Fitzpatrick Diesel Discussion 10 03-09-2001 10:15 AM
Fuel pump check valve ARJAY Tech Help 5 07-20-2000 10:08 PM

All times are GMT -4. The time now is 09:31 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page