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 ShopForum > Technical Information and Support > Tech Help

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 08-11-2002, 12:59 PM
Registered User
 
Join Date: Jan 2002
Location: Colorado Springs, CO
Posts: 1,006
Question W124 Front Control Arm Bushings

Hello,

How can I check if my front control arm bushings are in installed properly? I have read the factory manual and they say that the rears should be installed with flat parts vertical and fronts should be horiztonal.

A mehanic installed them 9 months ago, with parts from Rusty Cullens. These parts have 3 bumps on them on opposite sides. Does this correspond to the flats parts? On all four bushings, the 3 bumps are at top and bottom, which MAY sugest a problem.

In additon -the rears look fine, BUT the top part of the bushing in the front looks compressed such that the rubber is squeezing out at the top (bottom looks okay).

This seems like a problem to me!

Am I correct in thinking the front, front control arm bushings are improperly installed and/or failed? ... which could be the cause of the vibration I've been having.

Thanks,
Brian
Reply With Quote
  #2  
Old 08-14-2002, 11:13 AM
csnow's Avatar
Registered User
 
Join Date: May 2002
Location: Mass
Posts: 1,127
Surprised you got no responses.

I can't remember whether the bumps line up with the flats or not. I may have some old bushings kicking around to check.
As you suspected, if they are all facing the same direction, they are not installed correctly.

As you stated, the front bushings should have the flats facing horizontally, and the rear bushings should have their flats facing vertically.

How significant is this distinction in terms of handling?
I'm really not sure, but I would like to hear from Steve!

This orientation would seem to encourage a slight toe-out adjustment as rolling resistance increases.
Of course, it may only be relevant under heavier turning loads, in which case it seems that this would encourage mild understeer, or at least a slightly delayed reaction to steering input.

I'll even float a 3rd theory (why not, I'm on a roll!): The spring exerts more downward force on the front bushing than the rear (due to its position), so this orientation simply 'levels' the control arm.

Either way, I would speculate that this is not the cause of your vibration.

Not sure if the 'squeezing' you mention is an indicator of the condition of that bushing, but I will note that the 'top' of the bushing is under load while stationary, because the spring is pushing it downward.
__________________
1986 300E 5-Speed 240k mi.
Reply With Quote
  #3  
Old 08-14-2002, 12:02 PM
Registered User
 
Join Date: Jan 2002
Location: Colorado Springs, CO
Posts: 1,006
Steve has posted information about this in another thread of 767Flyery's but in his case the REARs were incorrect and Steve mentioned these are critical.

So, I'm not sure if the fronts would cause the same type of problem/vibration


Brian
Reply With Quote
  #4  
Old 08-14-2002, 12:07 PM
Registered User
 
Join Date: Jan 2002
Location: Colorado Springs, CO
Posts: 1,006
I am also not sure if tightening the bushings with the wheels hanging in the air and no support under control arms would wear out bushings in no time, yet still appear to be "tight" ...

I know what Steve's comments are in relation to 767Flyer, but I'm cautious to assume they apply directly to my situation.


Brian
Reply With Quote
  #5  
Old 08-14-2002, 10:43 PM
tvpierce's Avatar
Registered User
 
Join Date: Feb 2002
Location: Portland, ME
Posts: 612
I am holding a set of these bushings in my grubby little meathooks right now. On both sets of bushings ("two-bump" and "three-bump") the flat parts line up with the bumps.

Jeff Pierce
__________________
Jeff Pierce

Current Vehicles:
'92 Mercedes 190E/2.3 (247K miles/my daily driver)
'93 Volvo 940 Turbo Wagon (263K miles/a family truckster with spunk)
'99 Kawasaki Concours
Gravely 8120
Previous Vehicles:
'85 Jeep CJ-7 w/ Fisher plow (226K miles)'93 Volvo 940 Turbo Wagon
'53 Willys-Overland Pickup
'85 Honda 750F Interceptor
'93 Nissan Quest
'89 Toyota Camry Wagon
'89 Dodge Raider
'81 Honda CB 750F Super Sport
'88 Toyota Celica
'95 Toyota Tacoma
'74 Honda CB 550F
Reply With Quote
  #6  
Old 08-14-2002, 11:11 PM
Registered User
 
Join Date: Jan 2002
Location: Colorado Springs, CO
Posts: 1,006
Thanks for the comments. I looked at many 300E's at my mechanics shop, all also had the bumps (lugs in factory manual) horiztonal and rears vertical. I was also able to see several bushing kits and the flat spots matched up in all cases.

Next week I'll get new bushings installed and see if it helps.

Thanks
Brian
Reply With Quote
  #7  
Old 08-15-2002, 12:26 PM
tvpierce's Avatar
Registered User
 
Join Date: Feb 2002
Location: Portland, ME
Posts: 612
BTW, what did your mechanic quote you for hours on replacing the bushings. The reason I ask is that my local MB dealer quoted me 4 hours just for the press work. (not including removing the control arms from the car.) Seemed high to me.

Jeff Pierce
__________________
Jeff Pierce

Current Vehicles:
'92 Mercedes 190E/2.3 (247K miles/my daily driver)
'93 Volvo 940 Turbo Wagon (263K miles/a family truckster with spunk)
'99 Kawasaki Concours
Gravely 8120
Previous Vehicles:
'85 Jeep CJ-7 w/ Fisher plow (226K miles)'93 Volvo 940 Turbo Wagon
'53 Willys-Overland Pickup
'85 Honda 750F Interceptor
'93 Nissan Quest
'89 Toyota Camry Wagon
'89 Dodge Raider
'81 Honda CB 750F Super Sport
'88 Toyota Celica
'95 Toyota Tacoma
'74 Honda CB 550F
Reply With Quote
  #8  
Old 08-15-2002, 12:30 PM
Registered User
 
Join Date: Jan 2002
Location: Colorado Springs, CO
Posts: 1,006
The dealer wanted $500 for the job, including alignment. My mechanic ended up charging me more, 8 hrs, because one of the bushings needed to be cut out with a torch.
Reply With Quote
  #9  
Old 08-15-2002, 12:40 PM
tvpierce's Avatar
Registered User
 
Join Date: Feb 2002
Location: Portland, ME
Posts: 612
This info is too late for you, but maybe someone else can benefit from it:
I got brand new control arms with new bushings and ball joints already pressed for my '92 190E -- and it was cheaper than the parts and press-work labor. (even with me removing and re-installing the control arms myself)

Jeff Pierce
__________________
Jeff Pierce

Current Vehicles:
'92 Mercedes 190E/2.3 (247K miles/my daily driver)
'93 Volvo 940 Turbo Wagon (263K miles/a family truckster with spunk)
'99 Kawasaki Concours
Gravely 8120
Previous Vehicles:
'85 Jeep CJ-7 w/ Fisher plow (226K miles)'93 Volvo 940 Turbo Wagon
'53 Willys-Overland Pickup
'85 Honda 750F Interceptor
'93 Nissan Quest
'89 Toyota Camry Wagon
'89 Dodge Raider
'81 Honda CB 750F Super Sport
'88 Toyota Celica
'95 Toyota Tacoma
'74 Honda CB 550F
Reply With Quote
  #10  
Old 08-15-2002, 12:43 PM
Registered User
 
Join Date: Jan 2002
Location: Colorado Springs, CO
Posts: 1,006
tvpierce,

This is what I'm scheduled to do. I ordered the parts from the dealer on Tuesday and am having them installed next Wednesday

Brian
Reply With Quote
  #11  
Old 08-15-2002, 01:12 PM
csnow's Avatar
Registered User
 
Join Date: May 2002
Location: Mass
Posts: 1,127
I'm not a professional mechanic, but I have rebuilt 3 pairs of control arms this year, once with access to a hydraulic press, and twice without.

IMHO, 4 hours is too much for the press work. 1-2 hours for a pair seems fair, including R&R of all bushings and balljoints.
The bushings are sometimes stuck, but drilling through one of them, and knocking the other one out from behind does not take very long.

$500 for the whole job including alignment is a good deal.

Email the control arms to me, and I'll do it in an hour with my [now perfected] 'vice and big hammer' technique
__________________
1986 300E 5-Speed 240k mi.
Reply With Quote
  #12  
Old 08-15-2002, 03:03 PM
tvpierce's Avatar
Registered User
 
Join Date: Feb 2002
Location: Portland, ME
Posts: 612
csnow,

Were you able to press in bushings and ball joints with just a vice? If so, do you mind elaborating on your process/technique?

Jeff Pierce
__________________
Jeff Pierce

Current Vehicles:
'92 Mercedes 190E/2.3 (247K miles/my daily driver)
'93 Volvo 940 Turbo Wagon (263K miles/a family truckster with spunk)
'99 Kawasaki Concours
Gravely 8120
Previous Vehicles:
'85 Jeep CJ-7 w/ Fisher plow (226K miles)'93 Volvo 940 Turbo Wagon
'53 Willys-Overland Pickup
'85 Honda 750F Interceptor
'93 Nissan Quest
'89 Toyota Camry Wagon
'89 Dodge Raider
'81 Honda CB 750F Super Sport
'88 Toyota Celica
'95 Toyota Tacoma
'74 Honda CB 550F
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 05:14 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, 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