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 02-14-2004, 07:28 PM
Registered User
 
Join Date: Aug 2002
Location: oregon
Posts: 135
Glow plug is loose

I started changing out my gp's today on my 84 300d. I got my front one out and seemed somewhat carboned up. I checked the archives on "what to do" at that point and decided to just twist a 6mm allen wrench into the hole to do a slight reaming. I then turned the car over to blow out any carbon. Upon putting the gp back in, it seems to wobble within the threaded hole and goes in farther than the others 'bottom out' at. From what I can see of the pre chamber threads, they don't appear stripped or anything of the sort. wondering if there was some type of washer or bushing I may have blown out of the hole opening. The new gp's match the old almost exactly except for the new ones are slightly tapered on the end. #2 gp went in fine and tight but i did not do the reaming and blowout. Ideas?

__________________
Whoever dies with the most toys......Wins!

1984 300d
165k miles
Reply With Quote
  #2  
Old 02-14-2004, 07:58 PM
lietuviai's Avatar
Registered User
 
Join Date: Mar 2003
Location: SW WA
Posts: 5,744
As far as I know there isn't any washer or bushing. The GP's thread in as they are. Only thng I can think of is that you cleaned out some of the carbon and it now the GP threads in deeper. As far as using an allen wrench, I would never stick anything without threads into something with theads as that would tend to flatten the threads. If you need to clean threads, always use a thread reamer.
__________________
DJ


84 300D Turbodiesel 190K with 4 speed manual sold in 03/2012
Reply With Quote
  #3  
Old 02-14-2004, 08:02 PM
whunter's Avatar
Moderator
 
Join Date: Dec 2003
Location: Metro Detroit, Michigan
Posts: 17,416
same on mine, works fine

Hello pdxman
Same as on mine which works fine.
#1. Glow plug goes in 1.5 mm deeper than the other four.
No problems so far, it runs fine and starts at -10F on glow plugs.

I will be curious to know why this happens.
Have a great day.
__________________
ASE Master Mechanic
asemastermechanic@juno.com

Prototype R&D/testing:
Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician.
Noise Vibration and Harshness (NVH).
Dynamometer.
Heat exchanger durability.
HV-A/C Climate Control.
Vehicle build.
Fleet Durability
Technical Quality Auditor.
Automotive Technical Writer

1985 300SD
1983 300D
1984 190D
2003 Volvo V70
2002 Honda Civic

https://www.boldegoist.com/
Reply With Quote
  #4  
Old 02-14-2004, 09:21 PM
Registered User
 
Join Date: Aug 2002
Location: oregon
Posts: 135
I don't believe I did anything to the threads as the allen wrench I used was slightly larger than the size of the tip but smaller than the diameter of the threads. Does anyone know how deep the prechamber is? If I snug the GP all the way up to the shoulder of the plug I won't go in too far and damage something will I?

Thanks
__________________
Whoever dies with the most toys......Wins!

1984 300d
165k miles
Reply With Quote
  #5  
Old 02-15-2004, 10:15 PM
Registered User
 
Join Date: Aug 2002
Location: oregon
Posts: 135
Well, I finished doing all five plugs (bosch) today. I just skipped the part on reaming the holes and had no further trouble.

I didn't keep track of the exact time it took as I didn't dedicate all my time at once, but would guess I spent nearly four hours changing all plugs out without removing any of the fuel lines.

Is it just me, or when working on cars is the number one item I spend time on is trying to retrieve dropped tools? If I didn't keep one of those spring loaded part retreivers handy I would still be out there looking for a dropped wrench between the pump and the lower crankcase.
__________________
Whoever dies with the most toys......Wins!

1984 300d
165k miles
Reply With Quote
  #6  
Old 02-16-2004, 07:07 AM
Registered User
 
Join Date: Apr 2002
Location: eastern ND
Posts: 657
Maybe we need strings on our wrenches, just like our mothers did with our mittens. Those deep engine crevices must be magnetic: the bigger the hurry the deeper the wrench/part goes.
__________________
daBenz - 1970 220D
Reply With Quote
  #7  
Old 02-16-2004, 05:41 PM
Banned
 
Join Date: May 2002
Location: Blue Point, NY
Posts: 25,396
Quote:
Originally posted by pdxman
I spent nearly four hours changing all plugs out without removing any of the fuel lines.
I can sympathize with that. However, after spending the better part of two hours on the 123 just trying to change #4, I realized that it is a whole lot easier, and a whole lot faster, to remove the fuel lines. On the 126 it takes ten minutes to remove all the lines and maybe 20 minutes to put them back if they decide to be a PIA. But, the job to remove and change #1 and #4 is now reduced to less than 20 minutes total!

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 10:31 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2024 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page