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 07-28-2005, 12:10 AM
Registered User
 
Join Date: Jan 2005
Posts: 159
Changing glow plugs in W140, which gaskets do I need ?

Hi folks,

I am about to change the glow plugs on my car. I will need to take off the intake manifold and love to clean out the dirt. Which gaskets, o rings etc, do I need ? Thanks. Please help.
__________________
1992 300SD, 290K miles.
Reply With Quote
  #2  
Old 07-28-2005, 02:39 AM
sixto's Avatar
smoke gets in your eyes
 
Join Date: Jun 2000
Location: SF Bay Area
Posts: 19,754
At least an intake manifold gasket and the gasket for the intake manifold end of the crossover pipe. The green o-rings on the mixing pipe end of the crossover pipe are usually good even after lots of miles.

If the IP is leaking oil from the shut-off valve, get an o-ring for the shut-off valve or just replace the shut-off valve.

Some folks can replace the glow plugs without removing the manifold.

Sixto
95 S420
87 300SDL
Reply With Quote
  #3  
Old 07-28-2005, 12:39 PM
Registered User
 
Join Date: Jan 2005
Posts: 159
http://www.***************/catalog/lookup_parts.cfm?SubcategoryID=5424&VehicleID=1194050&CFID=487724&CFToken=90289973

Which of these is the correct one ?

Also, what is the gasket on the cross over pipe called ? Thanks
__________________
1992 300SD, 290K miles.
Reply With Quote
  #4  
Old 07-28-2005, 01:37 PM
Registered User
 
Join Date: Jan 2001
Location: California
Posts: 2,068
Go ahead and get both gaskets. Looking at the link, the top one goes where the intake manifold meets the cylinder head, and the bottom one goes where the crossover pipe meets the intake manifold. Not sure which gasket on the crossover pipe you're speaking of, but the only other one is the green O-ring that Sixto mentioned.
Reply With Quote
  #5  
Old 07-28-2005, 04:19 PM
Registered User
 
Join Date: Jan 2005
Posts: 159
OK great. Thanks very much, everyone. I meant to say the Green O-ring that sixto mentioned. My bro in law also said it's not neccessary.
__________________
1992 300SD, 290K miles.
Reply With Quote
  #6  
Old 08-16-2005, 07:21 PM
Registered User
 
Join Date: Jan 2005
Posts: 159
Hi Folks,

There is a black layer of oil inside the intake manifold, in the cross-over pipe, and where it's going into the turbo. Do you recommend that I clean it ? Should I ? How do I clean this ? Because there is not really a good clearance to the intake manifold to clean. If I clean half-a**ly, something might fall out later.

Thanks for the help.
__________________
1992 300SD, 290K miles.
Reply With Quote
  #7  
Old 08-16-2005, 07:27 PM
sixto's Avatar
smoke gets in your eyes
 
Join Date: Jun 2000
Location: SF Bay Area
Posts: 19,754
Is it oily or is there a considerable amount of build-up? You have to remove the intake manifold to clean it. I'd advise that you take it to a machine shop to get it cleaned because it takes some nasty cleaners to remove the build-up. I haven't heard of anyone who noticed a performance improvement from cleaning the intake manifold.

One hypothesis on the rod bending problem of the 3.5 is that chunks of build-up get sucked into the combustion chamber.

Sixto
95 S420
87 300SDL
Reply With Quote
  #8  
Old 08-16-2005, 07:51 PM
Registered User
 
Join Date: Jan 2005
Posts: 159
I looks like a thin layer, but I think it's thicker than it looks. I've just read that Soaking in Biodiesel will dissolve everything.
__________________
1992 300SD, 290K miles.
Reply With Quote
  #9  
Old 08-17-2005, 02:40 AM
sixto's Avatar
smoke gets in your eyes
 
Join Date: Jun 2000
Location: SF Bay Area
Posts: 19,754
Makes you wonder what it does to rubber fuel lines and IP seals

If you have to pull the manifold to replace the glow plugs then consider having it cleaned. I wouldn't pull the manifold just to clean it.

Sixto
95 S420
87 300SDL
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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Strange plugs which are interspersed with glow plugs. ericnguyen Diesel Discussion 1 04-23-2003 07:58 PM
glow plugs M. Theofanides Diesel Discussion 5 01-05-2003 01:56 PM
Glow plug(s) or pre-glow timer relay problem? Mr.W123 Diesel Discussion 7 12-05-2001 09:35 AM
Changing Glow Plugs on '87 300D GreenDub Tech Help 2 07-19-2000 02:29 PM
Changing glow plugs and injectors on a 91-93 300D 2.5 Ari Tech Help 2 05-17-2000 11:25 PM



All times are GMT -4. The time now is 12:21 PM.


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