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 > Tech Help

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 08-12-2002, 05:28 PM
corsachili
Guest
 
Posts: n/a
Vacuum valve from EGR?

My 100K mile 1977 280C passed all but one portion of the rigorous smog test here in California. The measured emmissions were WELL below the allowable levels, impressive for a car of this vintage, and with so many miles on it. The one place it failed was that there was no vacuum at a valve near the front of the engine compartment (on the driver's side) which I believe is connected to the EGR valve. With no shop manual it's hard for me to know how they're supposed to work. I'm wondering if the EGR itself is merely clogged, or if something connected to it is inoperative. Can anyone point me in the right direction so that I can get this magnificent beast back on to the road where she belongs?
Reply With Quote
  #2  
Old 08-12-2002, 06:43 PM
Moderator
 
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
There is a thermo-vacuum valve at the front of the cylinder head. Should be red plastic! Only gets vacuum when the throttle is open. Allows vacuum to EGR valve above 50deg C & when the throttle plate is opened, venturi(or ported) vacuum.
__________________
MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator
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 05:43 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