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  #1  
Old 08-06-2015, 02:36 PM
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How much time to replace upper control arm bushings?

I'm gearing up to replace the upper control arm bushings (inner and outer) on the 1984 300DT. I just have to purchase a pickel fork and then will move forward. Anyone have an idea about how much time will I need to complete this task? If I started early on a Saturday morning, would I be finished by dinner? Thank you in advance for input.

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Old 08-06-2015, 03:08 PM
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If you pan on re-using the Upper Control Arm the Pickle For will destroy the Rubber Boot.

It is difficult to predict how one it will take someone to change what you are calling the Inner Upper Control Arm Bushings because once in a while the Bolt is rusted into the Sleeve inside of the Bushing and People have had to use a Sawsall to cut throught the Bolt and part of the Arm to get it apart. But, that is the worst case.

Best to read the Repair Links and see the issues that people have had doing the job.
Fast navigation Fast navigation Do It Yourself Links

I have never changed the Upper Control Arm Bushings so I cannot comment on removing the Busings and replacing them.

I would plan for the worst and have another ride available and hope for the best.

Remember not to torque the Bolt and Nut that goes through the Body till after the car is sitting normally on the Ground.

The below is how Mercedes wants it done.
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Last edited by Diesel911; 08-06-2015 at 03:26 PM.
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Old 08-06-2015, 03:58 PM
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You don't need to fool with the spring, so pretty simple and safe, assuming everything unbolts easy. Spray penetrant a few days before to help. Even quicker if you buy the whole control arm w/ bushings installed (not very expensive). I once changed the rubber bushings that attach the anti-sway bar, and that was easy. I have also removed the whole spindle to replace the lower ball joint (much harder) and recall ~1 day job (even longer w/o a good ball joint press).
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Old 08-07-2015, 02:59 AM
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One more disaster scenario that caught me when I replaced a UCA on a W123: the worst case is that the torsion bar end is rusted away, and the control arm can't be reattached. That could be a multi-day repair, and it isn't that remote a possibility if the car has lived its life in a rust-prone area.

If things go well, it will probably be a 2-3 hour job the first time. If something goes wrong, then it depends on how prepared you are to deal with it.
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Old 08-07-2015, 09:10 AM
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I do NOT recommend replacing the bushings alone... Just get the entire control arm, and new swaybar bushings...
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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!
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Old 08-07-2015, 12:37 PM
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I purchased the complete Lemforder UPCA along with Genuine Mercedes Benz UCA outer bushings (2 per side). Are these the sway bar bushings you speak of?
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Old 08-07-2015, 01:03 PM
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if you've got two new upper control arm assemblies complete with upper ball joints you wont have to worry about damaging the old upper ball joints with the "pickle fork". Jam in in there and let it EAT!
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Old 08-07-2015, 01:34 PM
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Quote:
Originally Posted by HuskyMan View Post
I purchased the complete Lemforder UPCA along with Genuine Mercedes Benz UCA outer bushings (2 per side). Are these the sway bar bushings you speak of?
Yes.
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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!
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  #9  
Old 08-07-2015, 01:46 PM
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Thank you to all who answered my questions concerning this job. Now, it is time to plan the job and get to work. Perhaps I'll hire some Hooters girls to supply beer, hot wings and hand me the necessary tools and parts during the replacement process. At least there will be a distraction if problems develop.

On another note, I wish I had access to a fully equipped garage, i.e. lifts, tools, etc etc. I understand there exists rental garages in Colorodo and a few other places where one can rent a lift to work on a car. Those lifts make the work a lot easier.
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  #10  
Old 08-07-2015, 05:53 PM
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My swaybar bushings looked great so I left them alone. The drivers side is a pita. Indy said not to mess with it lnless there was a reason. Currently available parts aren't necessarily better. Do everything else so you're done.

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