Parts Catalog Accessories Catalog Tech Info Tech Forums
 
  Search our site:    
 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 01-31-2009, 08:20 PM
Registered User
 
Join Date: Jan 2009
Posts: 1
Red face What is the Fuel Pump Location of 1981 Mercedes-Benz 300SD Diesel?

Hello to Anyone that Knows,
I'm hoping someone can help us - my son and friend on working on their 1981 Mercedes Benz 300SD diesel that had the fuel pump go out. After several months of saving money, one was purchased at a junk yard (already removed from the wrecked vehicle). However, they are out there in the drive first taking off the fuel tank, then someone said it was under the hood. Can anyone give me a more exact location and maybe an image of what they're looking for? Any other pointers would be great too.
Thanks.
Reply With Quote
  #2  
Old 01-31-2009, 08:53 PM
Banned
 
Join Date: May 2002
Location: Blue Point, NY
Posts: 25,397
Welcome to the forum.

The fuel pump is under the hood on the driver's side. You'll need to find the injection pump which is the device next to the engine on the driver's side with five metal tubes sticking out the top.

On the side of this device facing the left side of the vehicle and down low......is the fuel pump. Follow the fuel line and you cannot miss it.

All that being said, however, why do you believe that the fuel pump "went out"? It's fairly common to diagnose a bad fuel pump on a diesel that won't start, when, in reality, that is not the cause.
Reply With Quote
  #3  
Old 02-01-2009, 11:22 AM
NC Benz's Avatar
Certified Thread Highjack
 
Join Date: May 2007
Location: Fuquay-Varina, NC
Posts: 485
Agreed. Thought I lost my fuel pump. It turned out to be air in the injector lines.
__________________
NC Benz
Fuquay-Varina, NC
1979 300D
1983 300D Turbo 260,000 Miles
1984 300D Turbo 345,000 Miles (sons car)
OBK #31
1998 Ford Expedition 5.4l (fer Haulin'!) 145,000
1973 19' SeaRay with 115 Mercury TOWER OF POWER!
Club Car Golf Cart 36V
Ex toys:
1967 Mustang 289 (First Car)
Fiat 124TC
1975 Honda CVCC
1980 Audi 5000 Turbo
Reply With Quote
  #4  
Old 02-01-2009, 02:33 PM
Diesel911's Avatar
Registered User
 
Join Date: Sep 2007
Location: Long Beach,CA
Posts: 12,955
I would slow your Son down and have him spend some time reading up on the job before attempting to install the replacement Fuel Injection Pump followed by timing it. Even people with a high degree of mechanical skill can have some trouble with the above.

It also leads to the question how did someone diagnose that the Fuel Injection Pump was the problem when they do not even know where the Fuel Injection Pump goes?

I am not trying to be negative just practical.

Also the Fuel Supply Pump (this is the pump the pulls the fuel From the Fuel Tank and pushes it through the Spin On filter and into the Fuel Injection Pump) is mounted on the side of the Fuel Injection Pump.
__________________
84 300D, 82 Volvo 244Gl Diesel
Reply With Quote
  #5  
Old 02-01-2009, 02:36 PM
Registered User
 
Join Date: Dec 2005
Posts: 417
Lift pump or injection pump? That is the question.
__________________
Brad
1981 300TD - daily driver
1963 Chevy II
2001 F-250 7.3 Power Stroke
Reply With Quote
  #6  
Old 02-01-2009, 06:25 PM
Johnhef's Avatar
Senior Member
 
Join Date: Feb 2005
Location: Frederick, Md
Posts: 4,516
or clogged filters...
__________________


1980 500SE/AMG Euro
1981 500SEL Euro
1982 380SEL
1983 300TD
1983 500SEC/AMG Euro
1984 500SEC
1984 300TD Euro
1986 190E 2.3-16
1986 190E 2.3
1987 300D
1997 C36 AMG
2003 C320T 4matic

past: 1969 280SE 4.5 | 1978 240D | 1978 300D | 1981 300SD | 1981 300SD | 1982 300CD | 1983 300CD | 1983 300SD | 1983 380SEC | 1984 300D | 1984 300D | 1984 300TD | 1984 500SEL | 1984 300SD | 1985 300D | 1986 300E | 1986 560SEL | 1986 560SEL/Carat | 1987 560SEC | 1991 300D 2.5 | 2006 R350
Reply With Quote
  #7  
Old 02-01-2009, 09:41 PM
Luther
 
Join Date: Dec 2008
Location: St Petersburg, Fl
Posts: 100
If the boys removed the fuel tank, it's time to clean it out and check the strainer, etc.
Reply With Quote
  #8  
Old 02-01-2009, 09:46 PM
Registered User
 
Join Date: Jan 2002
Posts: 14,683
Seems odd that it would take months of saving to afford a fuel pump. It also seems odd that a lift pump already removed from the car couldn't be identified in the engine compartment.
__________________
1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13
Reply With Quote
  #9  
Old 02-02-2009, 02:42 AM
Registered User
 
Join Date: May 2007
Location: Soquel, California
Posts: 8,329
First of all, where are you located? maybe there are some forum members that could come by and give the boys some pointers.

If they have to save for a few months for a fuel pump, how on earth are they going to afford to operate it? There is nothing more expensive than an old mercedes.

There is a wealth of information here on the forum to read doing some searches, or just by reading the daily threads.

In the resources tab above, look in the DIY section. www.dieselgiant.com has a lot of pictorials on DIY.

This old SD will be a great learning experience for them.

Charlie
__________________
http://www.ourlighterside.com/stuff/couple-sneaked-wh/



there were three HP ratings on the OM616...

1) Not much power
2) Even less power
3) Not nearly enough power!! 240D w/automatic transmissions)




Anyone that thinks a 240D is slow drives too fast.

84 300SD 270K
85 300D 360K
82 Datsun Kingcab Diesel 483k
83 Nissan long bed Diesel 134K
80 240D Naturally Exasperated, 370k
78 240D $300
86 Ford 6.9 195K
Reply With Quote
Old 02-02-2009, 02:42 AM
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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -4. The time now is 05:11 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, 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