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Old 08-30-2013, 09:11 PM
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Join Date: May 2009
Location: Sacramento, CA
Posts: 633
Rebooting UCA?

Found some "new" MB UCAs at PNP in good shape.
Removing them from the car pressed out some grease and flattened them.
Has anyone shot grease in these?
Also, I guess there is a MB boot kit available.1165860533 upper control arm ball joint boot kit, W116, 123, 126
Has anyone installed these boots? I always thought you had to buy a
whole new arm if they were bad.

New MB UCAs are 400.00. I got these for 12.00 each
It didn't take much to clean them up


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Rebooting UCA?-uca.jpg   Rebooting UCA?-uca2.jpg   Rebooting UCA?-uca3.jpg  
1984 300SD 300,000 miles--two tank WVO setup
2.88 diff & 500SEL anti-squat rear end
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Old 08-30-2013, 10:58 PM
Diesel911's Avatar
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Join Date: Sep 2007
Location: Long Beach,CA
Posts: 34,927
There is 2 ways to re-grease them.
Remove the Boot Retainer Spring and apply Grease all over the Shaft and install the Boot. That will push the Grease up.
Do as above but fill the boot with Grease.

Leave the boot installed and get a Meat type Syringe or a Needle for your Grease Gun and slide the needle parallel to the Ball Joint Shaft and under the Boot and inject the Grease inside it.
84 300D, 82 Volvo 244Gl Diesel
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Old 08-31-2013, 01:21 AM
Zacharias's Avatar
Not so amused
Join Date: Apr 2010
Location: West Quebec
Posts: 4,025
Nearly pristine used UCAs at a pick'n pull. Really? Everyone in the rust belt hates your guts right now .

I just did my lower balljoints by swapping spindles, so I bought one of the UCA boot kits in case I mangled a boot separating the spindle.

The kits are cheap but FWIW I would go the grease injection route if possible, that is if you are sure you didn't tear the boot and the joint is still tight.

2002 e320 4matic estate│1985 300d│1980 300td
Previous: 1979 & 1982 & 1983 300sd │ 1982 240d

“Let's take a drive into the middle of nowhere with a packet of Marlboro lights and talk about our lives.” ― Joseph Heller, Catch-22
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Old 08-31-2013, 01:30 AM
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Join Date: Jul 2008
Posts: 3,740
If that car, had those on it....I would be pulling the is probably a factory crate motor, just out of the was probably junked soon after because the vacuum locks didn't work
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Old 08-31-2013, 03:52 AM
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Join Date: May 2007
Location: Out in the Boonies of Hot, Dry, Dusty, Windy Nevada
Posts: 9,585
Good score Jeff.

I had a nick in one of the BJ boots, so got a good one from PNP, filled it with grease and slipped on the spring. using the needle is a good idea.

I found a set of upper arms on an 80 300D last year that were fairly new. put those on my 85 300D. I pulled off some good Tie Rod boots for some put on by my indie one time when the alignment shop said they couldn`t turn the Rods to adjust them. have no idea what brand, but the boots sure didn`t last, were all cracked but not opened up yet.

there were three HP ratings on the OM616...

1) Not much power
2) Even less power
3) Not nearly enough power!! 240D w/auto

Anyone that thinks a 240D is slow drives too fast.

80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff

We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works
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Old 08-31-2013, 01:27 PM
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Join Date: May 2009
Location: Sacramento, CA
Posts: 633
which grease?

There's a couple of nicks in the boots and grease is coming out, so I'm going to try using the re-boot kit.
What grease should go in there?


1984 300SD 300,000 miles--two tank WVO setup
2.88 diff & 500SEL anti-squat rear end
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