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-Benz Forum > Mercedes-Benz Tech Information and Support > Diesel Discussion

LinkBack Thread Tools Display Modes
Old 04-22-2003, 11:09 AM
Registered User
Join Date: May 2001
Posts: 165
603 Injection Nozzle leak - Help!

1987 300SDL
just turned 300k

My injection pump is leaking fuel at the top around the nozzles. I have read posts regarding changing the o-rings on the nozzles. My 603 differs from the 5 cylinder with regards to removing the nozzles. Insted of a standard six point socket, it requires a splined socket to remove the nozzles. Most of yesterday was spent trying to locate the tool. The 3rd MB dealer I visted told me the nozzles were factory set and not to remove them. His estimate was based on shop removal of the entire injector pump, sending out for repair/rebuild, and re-installing the pump using required electronic timing adjustment equipment ($700-1200 pump rebuild, + 4 hrs r/r $$$). Oooouuch!

Just spoke with a trusted all MB non-dealer repair shop and was told I was looking at an hour or two to remove nozzles and replace orings (+/- $125 repair).

If it's just o-ring replacement, I think I can handle it.


Where can I get the socket?
Anyone have the torque number for the nozzles?



Reply With Quote
Old 04-22-2003, 11:19 AM
Rick Miley's Avatar
Spark Free
Join Date: Jun 1999
Location: Land O Lakes, FL
Posts: 3,086
I think you're talking about delivery valve seals, not injector nozzles. Search for "delivery valve seals" in this forum and you'll get some good info. Here's a post with the torque procedure:

603 IP Seal Procedure
Rick Miley
2014 Tesla Model S
2018 Tesla Model 3
2017 Nissan LEAF
Former MB: 99 E300, 86 190E 2.3, 87 300E, 80 240D, 82 204D Euro
Chain Elongation References
Reply With Quote
Old 04-22-2003, 11:49 AM
Registered User
Join Date: May 2001
Posts: 165
so much for my CD manual using proper wording.

I'm refering to the pieces that the lines attach to which are located in the top of the pump.
Delivery Valves sounds good to me.

Thanks Rick
Reply With Quote
Old 04-22-2003, 12:04 PM
Registered User
Join Date: May 2001
Posts: 165
thanks again Rick,

I found the 30/30/35/35 torque setting. Phill is working on a socket.

should be good to go.
Reply With Quote
Old 04-22-2003, 12:07 PM
sixto's Avatar
smoke gets in your eyes
Join Date: Jun 2000
Location: SF Bay Area
Posts: 20,800
Hmm... my CD manual is makes a reasonable distinction between nozzles and delivery valves. Check out procedure 07.1-210.

The 603 uses the same delivery valve splined socket as the 617. It's available from many on-line sources for $20-30 if I remember. No way around that. The 6 point socket for the nozzles probably refers to a 27mm deep socket for what the forum calls injectors. I use the cheapest socket I found at Home Depot with no problem. But that's neither here nor there since you don't have to touch the injectors.

If you can't manage to work on the delivery valves with the intake manifold in the way, consider other things to check while the intake manifold is off. Things like the stop valve, glow plugs, injection line clips... I don't know what the manual calls these items

91 300SE
87 300SDL
83 300SD

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

All times are GMT -4. The time now is 01:46 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, 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