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 > Diesel Discussion

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 09-03-2010, 06:51 PM
Registered User
 
Join Date: Apr 2003
Location: SoCal
Posts: 140
Need 1995 E300d Vacuum diagrams

I heard a loud whistling noise under the hood after coming off the freeway. I traced it down to a vacuum line that comes off a control underneath the air filter box. The line was open, not connected to anything and ran up beside the battery.

Does anyone have diagrams of what the vacuum line routing for the three units underneath the air cleaner box for this car? One has a kind of a dome on it and says VAC ACC on the top. I can't find the diagram on the CD's I bought.

Thanks!

__________________
1960 190D (college car), gone
1995 E300D, 300 k
2004 Infiniti G35 (spouse mobile)
2003 Nissan Frontier Crew Cab
2007 Jeep Grand Cherokee Overland 3.0L MB diesel, 170K
1978 GMC Classic Motor Home
Reply With Quote
  #2  
Old 09-03-2010, 09:33 PM
general nuisance
 
Join Date: Dec 2009
Location: des moines, ia
Posts: 394
I don't have the specific E300D vac diagram but according to the Mitchel trans diag manual it's similar to the 300SD/S350D W140 cars.

http://w126.pp.ru/akp722.pdf

go to page 12
__________________
Steve A
92 W140 OM603 Bender
97 VW Jetta TDI
89 VW Fox diesel
Reply With Quote
  #3  
Old 09-04-2010, 11:05 AM
Registered User
 
Join Date: Apr 2003
Location: SoCal
Posts: 140
Need 1995 E300d Vacuum diagrams

Thanks for the reply!

In the diagram line #22 is the issue as I just found an open line next to the battery. I have no idea what the other consumers are. Right now I'll cap that line until I come up with a better solution.

Thanks!
__________________
1960 190D (college car), gone
1995 E300D, 300 k
2004 Infiniti G35 (spouse mobile)
2003 Nissan Frontier Crew Cab
2007 Jeep Grand Cherokee Overland 3.0L MB diesel, 170K
1978 GMC Classic Motor Home
Reply With Quote
  #4  
Old 09-04-2010, 11:14 AM
general nuisance
 
Join Date: Dec 2009
Location: des moines, ia
Posts: 394
Quote:
Originally Posted by b52rule View Post
Thanks for the reply!

In the diagram line #22 is the issue as I just found an open line next to the battery. I have no idea what the other consumers are. Right now I'll cap that line until I come up with a better solution.

Thanks!
#22 should be an open line into the car for testing I believe. #23 is supposed to supply vacuum to other things like the AC door actuators inside the car and such.

If you have a loud noise coming from one of the transducers there's a test to see if it's working properly. Perhaps that's the source of your noise?

Steve A
__________________
Steve A
92 W140 OM603 Bender
97 VW Jetta TDI
89 VW Fox diesel
Reply With Quote
  #5  
Old 09-04-2010, 11:23 AM
Registered User
 
Join Date: Apr 2003
Location: SoCal
Posts: 140
I have not had the car out since I plugged that line. The noise, consistent with a vacuum leak was coming from under the hood after coming off the freeway under high power. I'll know more later today after I take it for a run.

Thanks!
__________________
1960 190D (college car), gone
1995 E300D, 300 k
2004 Infiniti G35 (spouse mobile)
2003 Nissan Frontier Crew Cab
2007 Jeep Grand Cherokee Overland 3.0L MB diesel, 170K
1978 GMC Classic Motor Home
Reply With Quote
  #6  
Old 09-05-2010, 12:24 PM
Registered User
 
Join Date: Apr 2003
Location: SoCal
Posts: 140
I ran the car ragged yesterday with that port plugged. Everything ran as normal so now I have no idea what that line does, or where it goes. Unless someone has a diagram I'll just wait until I see one on the street or on a parking lot and ask if I can take a peek.

Unless someone has a diagram or pics somewhere.

Thanks!
__________________
1960 190D (college car), gone
1995 E300D, 300 k
2004 Infiniti G35 (spouse mobile)
2003 Nissan Frontier Crew Cab
2007 Jeep Grand Cherokee Overland 3.0L MB diesel, 170K
1978 GMC Classic Motor Home
Reply With Quote
  #7  
Old 09-05-2010, 12:42 PM
general nuisance
 
Join Date: Dec 2009
Location: des moines, ia
Posts: 394
If what you found making noise was 22 in the S350D vac diagram then you've plugged the atmosphere vent line. That would suggest that something upstream of the "plug" is not working properly.

Given that you are non-turbo car I would think that you only have one vac transducer in there and that would be for EGR control.

Somewhere I have a test procedure for the vac transducer, I'll dig around and see if I can find it.

steve a
__________________
Steve A
92 W140 OM603 Bender
97 VW Jetta TDI
89 VW Fox diesel
Reply With Quote
  #8  
Old 09-05-2010, 12:58 PM
Registered User
 
Join Date: Apr 2003
Location: SoCal
Posts: 140
The kicker is I don't know what is upstream. The open line was found next to the battery with no other vacuum line lying around to connect with. I'll keep poking around.

Don't you just love it when a plan comes together!

B52rule
__________________
1960 190D (college car), gone
1995 E300D, 300 k
2004 Infiniti G35 (spouse mobile)
2003 Nissan Frontier Crew Cab
2007 Jeep Grand Cherokee Overland 3.0L MB diesel, 170K
1978 GMC Classic Motor Home
Reply With Quote
  #9  
Old 09-09-2010, 09:04 PM
Registered User
 
Join Date: Apr 2003
Location: SoCal
Posts: 140
Another theory bites the dust..........

The buzzing sound returned after the vacuum line was plugged. I finally found the culprit. There is a part fwd of the battery with two wire connectors attached. The taller of the two, silver in color is vibrating/buzzing to beat the band. It is also rather hot, found out about that the hard way.

I have no idea what it is or what it does.

Progress! I think.
__________________
1960 190D (college car), gone
1995 E300D, 300 k
2004 Infiniti G35 (spouse mobile)
2003 Nissan Frontier Crew Cab
2007 Jeep Grand Cherokee Overland 3.0L MB diesel, 170K
1978 GMC Classic Motor Home
Reply With Quote
  #10  
Old 09-09-2010, 10:42 PM
Luxury Hooptie Enthusiast
 
Join Date: Aug 2010
Location: Screwston, TX
Posts: 333
Congratulations, mighty warrior! You have discovered AUXILIARY WATER PUMP. AUXILIARY WATER PUMP is not necessary for operation, but gives you +5 against Weak Heater when idling.
__________________
Current:
1994 E320, Brilliantsilber 191k
1982 300D, Silberblau under a blue repaint 256k

RIP:
1995 E300D Polarweiss, 287k
1995 E320 Polarweiss, 126k
Reply With Quote
  #11  
Old 09-09-2010, 10:54 PM
Registered User
 
Join Date: Apr 2003
Location: SoCal
Posts: 140
Talking

That thing was HOT! Buzzing to beat the band. I'll hit the men's mall this weekend as there are several 124's and 126's in the yard. As usual I'll check part numbers first.



Thanks!

__________________
1960 190D (college car), gone
1995 E300D, 300 k
2004 Infiniti G35 (spouse mobile)
2003 Nissan Frontier Crew Cab
2007 Jeep Grand Cherokee Overland 3.0L MB diesel, 170K
1978 GMC Classic Motor Home
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 05:41 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, 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