Driveshaft rebuild and bad centering bushings? - Mercedes-Benz Forum
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post #1 of 11 (permalink) Old 07-14-2014, 03:06 PM Thread Starter
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Driveshaft rebuild and bad centering bushings?

After I finish with the front end, I am going to do the driveshaft on my way to the rear end. I know the flex discs are bad, but how do you tell if the centering bushings are bad?
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post #2 of 11 (permalink) Old 07-14-2014, 03:21 PM
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I grabbed the driveshaft near the center bearing and moved it back and forth to check stiffness. Couldn't tell if it was bad so I put in the new bearing "because I was there", and it felt about the same. Inexperience on my part? Likely. Replaced a good bearing with a good bearing? Also likely.

If you are going to do the flex disks, then do the center bearing, "because you are there". It's inexpensive and you have to drop the drive shaft to do the disks. Just make sure when you separate the forward portion of the drive shaft from the rear section you mark it so the splines go back EXACTLY the same. Just remember to use some blue Loctite on the two bolts that hold the center bearing in place.

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post #3 of 11 (permalink) Old 07-14-2014, 03:40 PM Thread Starter
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I grabbed the driveshaft near the center bearing and moved it back and forth to check stiffness. Couldn't tell if it was bad so I put in the new bearing "because I was there", and it felt about the same. Inexperience on my part? Likely. Replaced a good bearing with a good bearing? Also likely.

If you are going to do the flex disks, then do the center bearing, "because you are there". It's inexpensive and you have to drop the drive shaft to do the disks. Just make sure when you separate the forward portion of the drive shaft from the rear section you mark it so the splines go back EXACTLY the same. Just remember to use some blue Loctite on the two bolts that hold the center bearing in place.
Sorry, not the center bearing but the centering bushings at each end of the drive shaft. Is this a even a wear item that goes bad? The flex disc's, center bearing and rubber bearing boot are already on the list for sure.

Last edited by emdcksn; 07-14-2014 at 03:48 PM.
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post #4 of 11 (permalink) Old 07-14-2014, 03:55 PM
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RATS, I didn't do the blue Loctite I did replace the carrier and the center bearing. The centering sleeves on mine seemed to be part of the shaft and they were ok. Here's a couple of pics from mine done last fall (along with a boatload of OTHER stuff I had to do)

The marks on the shaft painted to see easier and the age cracks in the bearing carrier
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post #5 of 11 (permalink) Old 07-14-2014, 04:30 PM Thread Starter
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RATS, I didn't do the blue Loctite I did replace the carrier and the center bearing. The centering sleeves on mine seemed to be part of the shaft and they were ok. Here's a couple of pics from mine done last fall (along with a boatload of OTHER stuff I had to do)

The marks on the shaft painted to see easier and the age cracks in the bearing carrier
Thanks Wooky, how hard was the bearing to remove/reinstall? Mercedes source says it is difficult and needs a special piece of pipe?

Last edited by emdcksn; 07-14-2014 at 04:34 PM.
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post #6 of 11 (permalink) Old 07-14-2014, 04:47 PM
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I claim Senior Moment!!! :-)

Oops, bushings. My experience is with the disks and the center bearing. But, I've not seen any wear on the bushings on the driveshaft ends that center the driveshaft for the transmission and differential, nor any requirement to refurbish or even check them. I could be wrong (see above), but unless there is a noticeable slop there, I'd not worry.
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post #7 of 11 (permalink) Old 07-14-2014, 04:58 PM Thread Starter
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I claim Senior Moment!!! :-)

Oops, bushings. My experience is with the disks and the center bearing. But, I've not seen any wear on the bushings on the driveshaft ends that center the driveshaft for the transmission and differential, nor any requirement to refurbish or even check them. I could be wrong (see above), but unless there is a noticeable slop there, I'd not worry.
Thanks. I'll check for any play once the disc's are unbolted.
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post #8 of 11 (permalink) Old 07-14-2014, 06:05 PM
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Originally Posted by emdcksn View Post
Thanks Wooky, how hard was the bearing to remove/reinstall? Mercedes source says it is difficult and needs a special piece of pipe?
Well since I was replacing both the carrier and the bearing I just had to get the old off the shaft, came off fairly easy using a short prybar I have here (looks like a bent flat tip screwdriver) and just worked my way around til it popped off

Setting the new bearing in the carrier I used a short pipe nipple of the same diameter and tapped it in, same with the bearing to the shaft being VERY careful not to let it slip and mess up the seal. You can probably tell I don't have too many of the "special" tools here, my Uncle Art (R.I.P) taught me to work with what ya have on hand, the only man I knew who could tune a car by ear and have it within specs
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Some days it's just not worth chewing through the restraints
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'11 Suzuki SX4 Sport Sedan
'02 S-10 Truck
'72 SeaBird boat, "Riff Raft", overhaul restarted

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post #9 of 11 (permalink) Old 07-14-2014, 06:49 PM Thread Starter
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Well since I was replacing both the carrier and the bearing I just had to get the old off the shaft, came off fairly easy using a short prybar I have here (looks like a bent flat tip screwdriver) and just worked my way around til it popped off

Setting the new bearing in the carrier I used a short pipe nipple of the same diameter and tapped it in, same with the bearing to the shaft being VERY careful not to let it slip and mess up the seal. You can probably tell I don't have too many of the "special" tools here, my Uncle Art (R.I.P) taught me to work with what ya have on hand, the only man I knew who could tune a car by ear and have it within specs
Thanks Wooky
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post #10 of 11 (permalink) Old 01-20-2019, 12:08 AM
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Originally Posted by emdcksn View Post
Thanks Wooky, how hard was the bearing to remove/reinstall? Mercedes source says it is difficult and needs a special piece of pipe?
awakening an old thread when i was searching for the dimensions of said bearings, aswell as the centering bushings.
ive swapped countless of center-bearings on different benzes without any special pipe.
the difficult part is normaly getting the old one out, i just use a hammer, and something to tap it out with "from above" getting it back in is a lot easier.

the lovely Kent Bergsma at Mercedessource loves selling his special kit, tools and his own unique compounds of snakeoil.
apperantly you need a special tool to undo the shockmounts, instead of a normal spanner. (22mm if i recall correctly)

Hope you had success with your swap anyhow
(with or without a special pipe)

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