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 05-13-2012, 09:15 PM
SoCal Diesel's Avatar
Registered User
 
Join Date: May 2012
Location: Southern CA
Posts: 36
87 300e Turbo Hard Starting

I am getting an 87 300e Wagon Turbo Diesel tomorrow. My friend is the original owner and has owned a few diesel Mercedes over the years. He said the car was gradually getting harder to start until one day it wouldn't. He thought it might be the glow plugs. He towed it to the shop and since it has been there 5 months since the breakdown, the shop foreman cannot remember what exactly is wrong and the work order cannot be found. He vaguely remembers the problem as possibly injection pump timing because he said it DID run but was very hard to start. That is all I have to go on. I would love a few suggestions of what to check upon initial inspection when I get it to my house tomorrow. The car has 234k and has had timely services during its life. A member on BenzWorld suggested delivery valve seals on the pump, but could timing chain stretch also cause the pump to be WAY out of time it will not start?
Reply With Quote
  #2  
Old 05-13-2012, 09:22 PM
Registered User
 
Join Date: Jan 2002
Posts: 18,353
Glow plugs.
__________________
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
  #3  
Old 05-13-2012, 09:24 PM
Jeremy5848's Avatar
Registered Biodiesel User
 
Join Date: Mar 2006
Location: Sonoma Wine Country
Posts: 8,393
It's a 300D Turbo. The 300E is a gasser.

X2 on glow plugs.
__________________

"Buster" in the '95

Our all-biodiesel family
1995 E300D (W124) . .239,000 miles My car
1996 E300D (W210) . .313,000 miles Wife's car
Santa Rosa population 170,685 (2012)
Total. . . . . . . . . . . . 722,685
"Oh lord won't you buy me a Mercedes Benz."
-- Janis Joplin, October 1, 1970
Reply With Quote
  #4  
Old 05-13-2012, 09:25 PM
SoCal Diesel's Avatar
Registered User
 
Join Date: May 2012
Location: Southern CA
Posts: 36
Is there a shop manual available online for information? Is the procedure the same for checking glow plugs on the 124 chassis and the 123? I had a 240d for some time and am familiar with the procedure on that model.
Reply With Quote
  #5  
Old 05-13-2012, 09:36 PM
engatwork's Avatar
busy
 
Join Date: May 2000
Location: Soperton, Ga. USA
Posts: 11,932
Go to startekinfo.com, workshop resources and find the link for the w124 manual.

If you have been under the hood of the diesel 123 then you will feel comfortable under the hood of the diesel 124.
__________________
Jim
Reply With Quote
  #6  
Old 05-13-2012, 09:51 PM
vstech's Avatar
DD MOD, HVAC,MCP,Mac,GMAC
 
Join Date: Mar 2006
Location: Mount Holly, NC
Posts: 26,173
Quote:
Originally Posted by SoCal Diesel View Post
I am getting an 87 300e Wagon Turbo Diesel tomorrow. My friend is the original owner and has owned a few diesel Mercedes over the years. He said the car was gradually getting harder to start until one day it wouldn't. He thought it might be the glow plugs. He towed it to the shop and since it has been there 5 months since the breakdown, the shop foreman cannot remember what exactly is wrong and the work order cannot be found. He vaguely remembers the problem as possibly injection pump timing because he said it DID run but was very hard to start. That is all I have to go on. I would love a few suggestions of what to check upon initial inspection when I get it to my house tomorrow. The car has 234k and has had timely services during its life. A member on BenzWorld suggested delivery valve seals on the pump, but could timing chain stretch also cause the pump to be WAY out of time it will not start?
if regularly serviced, it's unlikely to be the timing chain stretch. most likely is glow plugs, or glow plug relay/fuse, but I'd imagine any shop would check that first... My 87 TD (technically, classed as an E300 TD) has a problem with air getting in the pump via the fuel temp thermostat leaking... simple fix, but I just park with the nose down, and it starts up every time.
another possibility is the shutoff valve has failed, and it's keeping the car from starting. ya check that by starting the car and watching the stop lever for motion... if it flutters, it's likely the valve.
aside from those simple checks, ya'd have to have the car and tell us some symptoms first...
__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
Reply With Quote
  #7  
Old 05-14-2012, 01:33 AM
SoCal Diesel's Avatar
Registered User
 
Join Date: May 2012
Location: Southern CA
Posts: 36
Thanks for the ideas and suggestions. Is the procedure for checking the 124 glow plugs different from the 123?
Reply With Quote
  #8  
Old 05-14-2012, 10:55 AM
Jeremy5848's Avatar
Registered Biodiesel User
 
Join Date: Mar 2006
Location: Sonoma Wine Country
Posts: 8,393
Same procedure, just remember to check all six -- don't stop after four or five! Easiest to pull the plug at the preglow relay and check each pin to ground. You should get no more than an Ohm or two, depending on the accuracy of your meter. New glow plugs generally measure about half an Ohm. Measuring at the plug also checks the cable and all of the connectors along the way to the glow plug.

If one or more measure many Ohms (hundreds or even infinite) then you have a possible bad glow plug. The potentially bad ones need to be rechecked at the glow plug connector to eliminate the wiring as the cause.

If all of the glow plugs appear good, you need to check each one for 10 Volts or so during preglow. That makes sure the relay and wiring is good.

Removing the glow plugs and testing them individually with a battery and heavy wire is the last choice as it's a lot more work.

Jeremy
__________________

"Buster" in the '95

Our all-biodiesel family
1995 E300D (W124) . .239,000 miles My car
1996 E300D (W210) . .313,000 miles Wife's car
Santa Rosa population 170,685 (2012)
Total. . . . . . . . . . . . 722,685
"Oh lord won't you buy me a Mercedes Benz."
-- Janis Joplin, October 1, 1970
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 11:23 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2018, 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