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 09-23-2012, 04:22 PM
Registered User
 
Join Date: Sep 2010
Location: Brooklyn,NY
Posts: 641
Lots of clunking front driver's side

Hi everyone. Trying to chase down a clunk that I feel and hear below my feet. It's definitely not the UCA since it was recently changed.

One clue... The car makes a small clunking when cold but once I get going and the car heats up, the clunking is bad. I mostly hear it when I brake and turn. I can feel the steering wheel kinda softly lock and if I turn it I hear the clunk... Would the drag link bushing do something like that? It looks worn.

thanks
Attached Thumbnails
Lots of clunking front driver's side-2012-09-23_14-59-00_840.jpg  
__________________
1984 300td euro turbo
Reply With Quote
  #2  
Old 09-23-2012, 04:23 PM
sixto's Avatar
smoke gets in your eyes
 
Join Date: Jun 2000
Location: SF Bay Area
Posts: 20,436
Guide rod mounts.

Sixto
87 300D
Reply With Quote
  #3  
Old 09-23-2012, 04:27 PM
Registered User
 
Join Date: Sep 2010
Location: Brooklyn,NY
Posts: 641
Doesn't look overly worn... Should I be able to see tears?
Attached Thumbnails
Lots of clunking front driver's side-2012-09-23_14-58-47_658.jpg   Lots of clunking front driver's side-2012-09-23_15-00-43_656.jpg  
__________________
1984 300td euro turbo
Reply With Quote
  #4  
Old 09-23-2012, 04:29 PM
sixto's Avatar
smoke gets in your eyes
 
Join Date: Jun 2000
Location: SF Bay Area
Posts: 20,436
There's also the front attachment at the LCA. I think it's under the spring perch so it's difficult/impossible to see.

Sixto
87 300D
Reply With Quote
  #5  
Old 09-23-2012, 04:31 PM
Registered User
 
Join Date: Sep 2010
Location: Brooklyn,NY
Posts: 641
this? Doesn't look worn...
Attached Thumbnails
Lots of clunking front driver's side-2012-09-23_15-00-01_945.jpg  
__________________
1984 300td euro turbo
Reply With Quote
  #6  
Old 09-23-2012, 05:20 PM
Registered User
 
Join Date: Aug 2006
Posts: 185
I am trying to chase down a clunk also. Is there a good way to check the guide rod mount? It looks like it would be a pain to replace. My car is 1985300 SD
Reply With Quote
  #7  
Old 09-23-2012, 05:32 PM
sixto's Avatar
smoke gets in your eyes
 
Join Date: Jun 2000
Location: SF Bay Area
Posts: 20,436
I don't know about checking but guide rod mounts are 'normal' wear item. If you have 200K miles on the car, it's very likely new quality guide rod mounts will improve things.

Sixto
87 300D
Reply With Quote
  #8  
Old 09-23-2012, 06:03 PM
snookwhaler's Avatar
Linesider
 
Join Date: Feb 2009
Location: Treasure Coast, FL
Posts: 1,417
Quote:
Originally Posted by digieditny View Post
Hi everyone. Trying to chase down a clunk that I feel and hear below my feet. It's definitely not the UCA since it was recently changed.

One clue... The car makes a small clunking when cold but once I get going and the car heats up, the clunking is bad. I mostly hear it when I brake and turn. I can feel the steering wheel kinda softly lock and if I turn it I hear the clunk... Would the drag link bushing do something like that? It looks worn.

thanks
More than likely the rear guide rod mount if you feel the clunk in the floor. With the car in park, grab a front tire at the 9 and 3 o'clock position and rock the tire forcefully front to rear. As the car starts to move back and forth, look under the car at the rear guide rod mount. If you see it moving in and out.... It is toast.

You CAN NOT tell if it is bad "just by looking" at it.

Here is a thread I put up on this a few years ago.

Guide Rod mount fun
__________________
AJ

1985 300D (SOLD)

Reply With Quote
  #9  
Old 09-23-2012, 06:07 PM
bustedbenz's Avatar
Registered User
 
Join Date: Feb 2007
Location: Lexington, NC or Boone, NC
Posts: 2,268
Both times I've had clunking noises from the front end, it was a lower ball joint on 2 different cars in the last year or two. One of them, every time I'd go over a speed bump, or turn sharp enough to dip a front corner, I'd hear a clunk/bang. The other one (still need to get it worked on one day next week) -- as I rotate the steering wheel, the wheel is noticeably hard to turn and I get a popping noise/feel from the right front, through the floorboard, through the steering wheel, everywhere. That one's so frozen up I think the joint is wallowing out the spindle instead of turning where it's intended to... guess we'll find out how bad that damage is when they get the old one out.
__________________


http://www.appstate.edu/~salleyms

"What could possibly go wrong?"

~Michael S.~ -
1986 M-B 300SDL, retired due to rust and electrical problems. Donated engine to:
1987 M-B 300SDL, odo dead. New project.
1982 M-B 240D, odo stopped at 308,000
1982 M-B 300SD, 175,000
1989 Dodge Ramcharger, 87,000 - 4wd, 318
Reply With Quote
  #10  
Old 09-26-2012, 10:59 AM
Registered User
 
Join Date: Sep 2010
Location: Brooklyn,NY
Posts: 641
Bustedbenz. Your problem sound exactly what's happening to me. I'm going to check the lower ball joints hopefully this friday.
__________________
1984 300td euro turbo
Reply With Quote
  #11  
Old 09-28-2012, 06:46 PM
Registered User
 
Join Date: Sep 2010
Location: Brooklyn,NY
Posts: 641
Could this be what is making the noise? Is this dangerous?

Drove the car a little bit today and didn't notice a peep. Only happens when the car is driven for at least 30mins.
Attached Thumbnails
Lots of clunking front driver's side-picture-one-300td.jpg  
__________________
1984 300td euro turbo
Reply With Quote
  #12  
Old 09-28-2012, 09:19 PM
vstech's Avatar
DD MOD, HVAC,MCP,Mac,GMAC
 
Join Date: Mar 2006
Location: Mount Holly, NC
Posts: 26,196
Quote:
Originally Posted by digieditny View Post
Could this be what is making the noise? Is this dangerous?

Drove the car a little bit today and didn't notice a peep. Only happens when the car is driven for at least 30mins.
that's the shock mount... it appears fine to me. dirty, but fine.
__________________
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
  #13  
Old 10-07-2012, 12:57 AM
eatont9999's Avatar
Registered User
 
Join Date: Jan 2012
Location: Dallas, TX
Posts: 1,948
I vote for guide rod bushings. My car makes a clunk that I can feel in the lower driver's floorboard when I come to a stop, go over uneven terrain or turn the wheel quickly. I have done the test and I the guide rod busing is hot. The boot is torn and I can see the rust, etc. I need to fix this sooner than later. The parts are not very expensive and it seems like a DIY job. I just need the time.
__________________
1991 F250 super-cab 7.3 IDI. (rebuilt by me) Banks Sidewinder turbo, hydroboost brakes, new IP and injectors.
2003 S430 - 107K
1983 300SD - Tanoshii - mostly restored ~400K+.
1983 300SD - Good interior. Engine finally tamed ~250K.
Monark Nozzle Install Video - http://tinyurl.com/ptd2tge
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 08:18 AM.


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