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 > Diesel Discussion

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 03-07-2007, 03:27 AM
Registered User
 
Join Date: Dec 2005
Posts: 10
Diesel Knock after new seals and return lines

My 300sdl ran like a top until last Thursday. A bit of diesel knock on cold morning but once it was warmed up it was almost a quiet as a gaser.

The IP was leaking on top. I took it to a local private MB shop, had the seals replaced and the non standard return lines replaced.

Now it has a loud diesel knock at idle that does not go away when the motor is hot, and feels like a gas engine with a miss, i.e. the motor rocks side to side, and you can feel it in the car.

If I put the car in neutral and rev the engine very slowly it has what I would describe as going from hammering to 1000 rpm where it just seems to have a shudder, not running smooth, and the at about 1800-2000 rpm it is smooth again.

I think the diesel knock is in #1. When I put my hand on the return lines from 1 to 6 It is most prevelant at #1. I also used an infared temperature gun on the injectors and #1 is about 192 degrees and the temp is even at about 197 for 2, 3, 4, then goes up to about 205 on #5 and 215 on #6.

Everyone who know the car wants to know what is wrong with it. The diesel knock is loud. I know it is not just me.

Along with this, I now have what smells like exhaust fumes coming into the car through the heating system. I can smell and see the exhaust in the engine compartment, but cannot fine the source.

At speed it runs well.

Last week I had a great car with a leak, now I have a smelly car that runs rough.

Any thoughts for correction.
Reply With Quote
  #2  
Old 03-07-2007, 07:12 AM
Parrot of Doom's Avatar
1997 W210 E300TD 243,000
 
Join Date: Mar 2006
Location: Manchester, UK
Posts: 983
I'd have your injectors tested.
Reply With Quote
  #3  
Old 03-07-2007, 07:50 AM
Shorebilly's Avatar
Marine Engineer (retired)
 
Join Date: Aug 2006
Location: West Virginia
Posts: 1,268
Exclamation Hold that indy MB shop responsible

Perhaps you should take it back to the mechanic that did your seals replaced.....if someone, like a helper, decided that they needed to loosen the nuts on either side of the delivery valve.....then your IP is more than likely out of calibration.....I would assure that the local MB shop make it good.....

If you look closely at the top of your IP each of those nuts should have a drop of bright paint.....Bosch uses the paint as a seal, to assure that no one fools with those nuts, and will void any warranty if they are disturbed...

SB

Luck to ya......but I would get an Attorney if necessary....the shop should be held responsible...
__________________

Diesels:
'85 300D, "Max, Blue Benz", 155K, 27.0 MPG
'84 190D 2.2, "Eva, Brown Benz", 142K, 40.2 MPG
'77 240D (parts car)
'67 Eicher ES 202 Tractor "Otto" (2cyl, Air Cooled, 30HP)
Gassers:
'94 Ford F-150, "Henry", 170K (300 Six) 17.5 MPG
'85 190E 2.3, 148K....Parts Car
'58 Dodge W300M Powerwagon (Flat Fenders) Less than 10 MPG
Reply With Quote
  #4  
Old 03-07-2007, 08:35 AM
Ara T.'s Avatar
Registered User
 
Join Date: Sep 2004
Location: Santa Rosa, CA
Posts: 2,075
I believe there is a law in California warranting any work performed by a mechanic for a pretty decent time period.
__________________
1985 CA 300D Turbo , 213K mi
Reply With Quote
  #5  
Old 03-07-2007, 10:40 AM
Banned
 
Join Date: May 2002
Location: Blue Point, NY
Posts: 25,396
What most likely happened is that one of the delivery valve seals didn't seat correctly. They can be a bit fickle at times.

Take it back to the shop and show them the injection knock and suggest that one of the delivery valves is amiss.
Reply With Quote
  #6  
Old 03-07-2007, 10:42 AM
rrgrassi's Avatar
mmmmmm Diesel...
 
Join Date: Jun 2006
Location: Royse City Tx
Posts: 4,868
Have them fix the exhaust leak also. They could have knocked something loose as well.
__________________
RRGrassi


70's SPM #5608 Fairmont A-4 MOW car

06 VW Jetta TDI 210K miles

82 300D 322K My Daily Driver-Warndreicke in the trunk. Trip ODO still working!

90 Dodge D250 5.9 Cummins/5 speed. 350K
Reply With Quote
  #7  
Old 03-08-2007, 01:54 AM
Registered User
 
Join Date: Dec 2005
Posts: 10
Brian:

Can you tell me more about a "delivery valve"? Is there a diagram or exploded IP view where I could see and understand the principles better/

Regards, NRK
Reply With Quote
  #8  
Old 03-08-2007, 10:10 AM
Banned
 
Join Date: May 2002
Location: Blue Point, NY
Posts: 25,396
The diagram is in the engine manual.

What usually occurs is the o-ring fails to seat properly. There is a specified three step torque sequence that is necessary to properly seat the o-ring. This tells me that it's not a good design and can be a bit problematic in getting it back into position. Many folks have suffered a similar fate.
Reply With Quote
  #9  
Old 03-08-2007, 03:55 PM
Registered User
 
Join Date: Dec 2005
Posts: 10
Thanks for the information. My manual is in .gif so I have a lot of searching to do.

Regards, NRK
Reply With Quote
  #10  
Old 03-08-2007, 05:37 PM
Registered User
 
Join Date: Oct 2006
Posts: 65
posting link to three step torque sequence?

thanks!
Reply With Quote
  #11  
Old 03-08-2007, 06:36 PM
Banned
 
Join Date: May 2002
Location: Blue Point, NY
Posts: 25,396
Quote:
Originally Posted by turbodeezl View Post
posting link to three step torque sequence?

thanks!
Tighten to 30Nm
Loosen
Tighten to 30Nm
Loosen
Tighten to 35Nm.
Reply With Quote
  #12  
Old 03-08-2007, 07:19 PM
Willing Participant
 
Join Date: Aug 2005
Location: USA
Posts: 1,255
These "delivery seals" are o-rings in the injection pump, then?
__________________
1982 300CD Petrol/Black Leather
Reply With Quote
  #13  
Old 03-08-2007, 07:21 PM
Banned
 
Join Date: May 2002
Location: Blue Point, NY
Posts: 25,396
They are part of the delivery valve at the individual outlets of the IP.
Reply With Quote
Reply

Bookmarks

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 02:29 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2011 Pelican Parts - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page