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 05-10-2011, 09:06 AM
winmutt's Avatar
85 300D 4spd+tow+h4
 
Join Date: Apr 2006
Location: Atl Gawga
Posts: 9,332
A word of advice about ground straps, click and clack and EGT sensors.

This weekend I had the trans out of the w124 to replace the clutch. Well I got it out Friday night and came back Sat to finish it up. Click and Clack, the Tappet Brothers, were on the radio but my fancy HD radio in the w123 kept fading out. SOOOOO. I tried to turn on the radio in the w124.

It came on but suddenly I saw a large quantity of smoke and smelled ozone. WTF I said and went running for the extinguisher. Seeing no flame I waited for the smoke to clear. Apparently lacking a ground strap, the glow plug system picked the shortest route to ground, which apparently was the metal sheath on the EGR probe.

Just a word of caution, when you unhook that battery to do work on the car, leave it unhooked until you are done, no matter how much you want to enjoy in hearing about the misery and tribulations of other car owners....

__________________
http://superturbodiesel.com/images/sig.04.10.jpg
1987 300D Sturmmachine
1991 300D Nearly Perfect
1994 E320 Cabriolet
1995 E320 Touring
2001 Eurovan FOR SALE
1985 300D car, sold and missed.
OBK #42
Reply With Quote
  #2  
Old 05-10-2011, 09:13 AM
dcotejr's Avatar
On the road again...
 
Join Date: Jun 2005
Location: Anniston, AL
Posts: 371
Talking Click and Clack are my heroes...

Benn listening to them when I can for about 20 years... Thanks for the heads up. That's probably something I would have tried in the same circumstances...
__________________
Mine: 1987 MB 420 SEL - 61K (Dec 2019)
Mine:1991 MB 350SDL - 244K (Aug 2011)- Totalled 9/14/2016
Mine:1981 MB 300SD - 326K mi (July 1997)-sold
Mine:1994 Ford F-150 - 210K+ (Dec 2015)
Wife's: 2008 MB C300 Sport - 92K mi (April 2009)
Reply With Quote
  #3  
Old 05-10-2011, 10:03 AM
JB3 JB3 is offline
Registered User
 
Join Date: Jan 2010
Location: RI
Posts: 6,861
Quote:
Originally Posted by winmutt View Post
This weekend I had the trans out of the w124 to replace the clutch. Well I got it out Friday night and came back Sat to finish it up. Click and Clack, the Tappet Brothers, were on the radio but my fancy HD radio in the w123 kept fading out. SOOOOO. I tried to turn on the radio in the w124.

It came on but suddenly I saw a large quantity of smoke and smelled ozone. WTF I said and went running for the extinguisher. Seeing no flame I waited for the smoke to clear. Apparently lacking a ground strap, the glow plug system picked the shortest route to ground, which apparently was the metal sheath on the EGR probe.

Just a word of caution, when you unhook that battery to do work on the car, leave it unhooked until you are done, no matter how much you want to enjoy in hearing about the misery and tribulations of other car owners....
Lol, you need to call in with this story, thats something they would probably love as a cautionary tale!
__________________
This post brought to you by Carl's Jr.
Reply With Quote
  #4  
Old 05-10-2011, 12:02 PM
Registered User
 
Join Date: Sep 2006
Location: Middle TN
Posts: 3,829
Quote:
Originally Posted by dropnosky View Post
Lol, you need to call in with this story, thats something they would probably love as a cautionary tale!
My 9 yr old keeps saying "let's call click & clack" every time I talk about fixing the SD or 78Z.
__________________
85SD 240K & stopped counting getting paint. 84SD 180,000. Probably up for sale in the fall 2020. 85TD beginning to repair to DD status.
Reply With Quote
  #5  
Old 05-10-2011, 12:41 PM
sjh sjh is offline
Banned
 
Join Date: Oct 2009
Posts: 580
Yep. When those electrons wont a ground they're pretty determined to get there.
Reply With Quote
  #6  
Old 05-10-2011, 01:48 PM
Orv's Avatar
Orv Orv is offline
Registered User
 
Join Date: Mar 2011
Posts: 698
I've heard of people burning up clutch cables and speedometer cables that way, on other cars. And radio transceivers...in amateur radio installations it's common to wire both the positive and negative connections directly to the battery, to minimize noise pickup. If the battery-to-chassis ground strap falls off, it's possible for the starter to find a new ground path through the radio's negative power lead and the radio chassis. It's common to fuse both the positive and negative wires, to protect the radio from this scenario.

"Sneak circuits" like this will drive you crazy, sometimes.

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 11:38 AM.


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