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 > Tech Help

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 10-11-2004, 12:09 AM
Registered User
 
Join Date: Mar 2004
Location: Flower Mound, Texas
Posts: 140
Q: Replaced waterpump on '95 E320 W124 - broke vacuum line - heater not working

Hi guys. Just finished replacing the waterpump in my '95 E320. (I'll post my 'experience' with that project later as I ran into a few difficulties, like the tensioner bolt stripping during the dissasembly ///// and the dealer gave me a timing belt that was too big - took awhile to figure that one out - SO make sure you compare timing belt sizes). Fortunately, all is back together and the car is running fine.

But I checked the operation of my heater, and it's not working. At any engine speed, at any setting of the ACC. The engine is definitely running warm enough for the heater to kick on, as she idled in the driveway for about 30 minutes tonight as I was checking the operation of the waterpump.

My main question is around this hard, plastic "white" vaccum hose that attaches (sorry for the failure terminology here, I'm totally guessing on this part) just under the front RH side {passenger side} of the valve cover - there's a control module here - a smaller black box - and this white vaccum hose travels from this module under the intake manifold to another fitting.

During my waterpump replacement, this hose snapped like a piece of uncooked spaghetti. And I'm wondering if this broken vacuum line is the cause? I think the heater was working six months ago (in texas, haven't used the heater since March). Can anyone tell me what this white, plastic vaccum line does? Or what it's called? I'll try to get another from my dealer asap.

If this doesn't solve the problem, I'll start investigating in all the other options, like a mono valve replacement.

Many thanks guys for your help. Best regards, 71Rcode


Last edited by 71Rcode; 10-11-2004 at 12:19 AM.
Reply With Quote
  #2  
Old 10-11-2004, 12:36 PM
Registered User
 
Join Date: Mar 2004
Location: Flower Mound, Texas
Posts: 140
All working now. It seemed I needed to rev the engine a bit, and all of a sudden, the monovalve begins to do its job. I believe that broken, white vacuum line is transmission related...I was able to 'patch' it for now with a length of rubber hose.
Reply With Quote
  #3  
Old 10-11-2004, 01:47 PM
Registered User
 
Join Date: Aug 1999
Location: Florida / N.H.
Posts: 8,804
That plastic line is the vac feed for the EGR and AIR switch over valves..
They get brittle from engine heat and crack.
Replace with a single length of rubber line and throw the plastic one out..
This line breaks and is the single most common reason for both EGR and Air pump CE lamp fault code on 104 engines .. it is the first place one should look when CE comes on from those two codes [ egr, air]
Reply With Quote
  #4  
Old 10-11-2004, 02:16 PM
Registered User
 
Join Date: Mar 2004
Location: Flower Mound, Texas
Posts: 140
Arthur - many thanks for your response. Very good information....I'll follow your advice. Best regards, 71Rcode

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 05:18 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2022, 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