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 > Mercedes-Benz SL Discussion Forum

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 10-22-2013, 11:56 AM
Registered User
 
Join Date: Jun 2008
Posts: 470
380sl Injector Seal Repair

My car's been idling rough. So, I sprayed brake cleaner around the injectors, and the idle changed significantly when I sprayed the 3rd,4th, and 5th cylinders' injectors. Consequently, I assume that those seals are allowing air into their cylinders.

As I replaced all the injectors and seals about 5 years ago, I'm now wondering whether I should just replace the rubber sealing rings, or the insulating sleeves, too.

Also, I notice that the manual shows another O-ring, but I'm not sure whether that goes on the base of the rubber sealing ring, or on the tip of the injector. So any help would be appreciated.

Thanks very much in advance.

Reply With Quote
  #2  
Old 10-23-2013, 12:49 AM
Strife's Avatar
General Purpose Geek
 
Join Date: Apr 2004
Location: KY USA
Posts: 2,238
There is a rubber "doughnut" (a seal) at the top of the injector insulator, and then the insulator has a conventional O-ring on the outside of it. To the best of my knowledge, there are no other rubber parts. The insulators I used came with the O-rings but not the doughnuts. I did this recently, and I'd say that your chances of removing the insulators without breaking them are low (they get brittle quickly); I'd also recommend cleaning the pockets thoroughly before installing new parts, and to use Syl-glyde or other "rubber safe" lubricant when installing.

Even if your other parts (the air distributor tubes, fittings, etc) are newish, be very careful because they are also hard and brittle by now. Read cautions on this site concerning non-MB supplied air distributor tubes (they may fail nearly immediately).
__________________
86 560SL
With homebrew first gear start!
85 380SL
Daily Driver Project

http://juliepalooza.8m.com/sl/mercedes.htm
Reply With Quote
  #3  
Old 10-23-2013, 09:06 AM
Registered User
 
Join Date: Jun 2008
Posts: 470
Thanks for the info, Strife. As I'm getting ready to order the parts, I was wondering if you thought that there was a significant difference in the MB vs aftermarket seals and insulators, like MTC and Woco? It's not that there's a big price difference, but I'm curious whether a big difference could exist in such simple things.

Also, do you really think that these things would have become brittle in only 5 yrs?
Reply With Quote
  #4  
Old 10-23-2013, 10:44 AM
nobby's Avatar
Automotive Nobbiest
 
Join Date: Aug 2005
Location: Barrie, Ontario
Posts: 821
Quote:
Originally Posted by mbboy View Post
Also, do you really think that these things would have become brittle in only 5 yrs?
Yup. Many hot/cold cycles. Left undisturbed they can last a very long time....providing they were of decent quality to begin with.

Those parts are reasonably priced from MB.
Reply With Quote
  #5  
Old 10-24-2013, 07:48 AM
Registered User
 
Join Date: Jun 2008
Posts: 470
Thanks again for the usual, well-informed advice, guys. I will definitely heed it.

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 02:11 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, 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