C320 rear crank seal leakage - Mercedes-Benz Forum
 
LinkBack Thread Tools Display Modes
#1 Old 01-06-2013, 09:46 AM
Junior Member
 
Join Date: Jan 2013
Location: Oregon
Posts: 4
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
(Thread Starter)
C320 rear crank seal leakage

I have a 2004 C320 4matic wagon and for some time the rear engine seal has been leaking and the result was both right side oxygen sensors were ruined. I understand that this is a common problem. Is there a better fix than just replacing the seal holder with the OEM part or a modification that might help? I just spent $1,782 to fix but from what I was told this setup is problamatic.
Gerry R is offline  
Sponsored Links
Advertisement
 
#2 Old 01-10-2013, 01:45 PM
Junior Member
 
Join Date: Jan 2013
Location: Oregon
Posts: 4
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
(Thread Starter)
Am I the only one with this problem? Hard to believe, oh well.
Gerry R is offline  
#3 Old 01-10-2013, 11:28 PM
Super Moderator
 
eric242340's Avatar
 
Join Date: Jun 2009
Location: Sichuan province China
Posts: 1,230
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
You are not the only person, it is a very common problem and the new parts are modified so once changed it should not happen again. I do not see how it can damage your 02 sensors though.

ERIC
eric242340 is offline  
#4 Old 01-10-2013, 11:36 PM
Junior Member
 
Join Date: Jan 2013
Location: Oregon
Posts: 4
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
(Thread Starter)
It seems that as oil leaks past the plate it is probably blown back hitting the wires which are quite close by. A really crappy place as it almost assures getting oil on them. And I might add that the amount of oil leakage is very small, I usually go 6-7k miles between changes and it has never been low enough to need to add.
Gerry R is offline  
#5 Old 01-10-2013, 11:54 PM
Super Moderator
 
eric242340's Avatar
 
Join Date: Jun 2009
Location: Sichuan province China
Posts: 1,230
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Quote:
Originally Posted by Gerry R View Post
It seems that as oil leaks past the plate it is probably blown back hitting the wires which are quite close by. A really crappy place as it almost assures getting oil on them. And I might add that the amount of oil leakage is very small, I usually go 6-7k miles between changes and it has never been low enough to need to add.
Oil on the wires will not damage the sensors, it will interupt the signals but once cleaned off all should work as normal, I think these sensors were only changed to make money for some workshop or they did not know what they were doing.

ERIC
eric242340 is offline  
#6 Old 01-11-2013, 09:22 AM
Junior Member
 
Join Date: Jan 2013
Location: Oregon
Posts: 4
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
(Thread Starter)
That's what I thought but I had two independant shops tell me they were contaminated and nothing could be done except replace after fixing the seal. The question now becomes how do I find a shop in my area (Portland Oregon) that will be straight and honest with me? One of these shops only works on MB, which is where I had it fixed. I have had dealers do this so I searched out independants.
Gerry R is offline  
#7 Old 01-11-2013, 09:46 AM
Super Moderator
 
eric242340's Avatar
 
Join Date: Jun 2009
Location: Sichuan province China
Posts: 1,230
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Browse through this thread from our sister forum, Benzworld;

http://www.benzworld.org/forums/reco...-repair-shops/

ERIC
eric242340 is offline  
Sponsored Links
Advertisement
 
Reply

  Mercedes-Benz Forum > Mercedes-Benz Enthusiasts Forums > DIY/Tech Help


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
User Tag List

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
timing seal vinnie201 DIY/Tech Help 0 03-28-2007 09:39 AM
Sticky Window Seal jpdhawaii Mercedes-Benz Sedans/Wagons 0 09-12-2006 02:02 AM
COOLANT LEAKAGE NEAR THE DRAIN PLUG ON A 2000 E200 KRK Mercedes-Benz Sedans/Wagons 2 02-16-2006 08:01 AM
Rear Window Seal Replacement benz76cal Diesel Discussion 0 01-21-2005 05:10 PM
Front Oil Seal Q moto777 Diesel Discussion 4 08-12-2004 10:08 AM

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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome