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  #1  
Old 05-23-2011, 03:46 PM
chazola's Avatar
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Join Date: Nov 2003
Location: London, United Kingdom
Posts: 1,241
W108 rear wheel bearing

Hello, I've been chasing a rear-end whirring noise for a while on my 108 250se and after checking the right rear wheel after a short drive this weekend I found a fair bit of play in that wheel when rocking it, so I'm guessing the bearing is knackered. Strangely, I had no play (or maybe I didn't grab it hard enough) when I checked about a month ago but I guess it was starting to go bad and that was checked cold...

I have no MB indies near me and the dealer rates are a joke as they are in the US, (plus I suspect they haven't got anyone there who's heard of the W108...) so I fancy diy-ing it. There's a good write-up on the pagoda SL group:

http://www.sl113.org/wiki/DriveShaft/RearWheelBearings

...which makes it look like not too bad of a job, though the parking brake dismantling has me a little worried. Has anyone here done this job before and have any advice?

cheers...

__________________
1993 320TE M104
---------------------------------------------------
past:

1983 230E W123 M102
1994 E300D S124 OM606 (x2)
1967 250SE W108 M129
1972 280se 3.5 W108 M116
1980 280SE W116 M110
1980 350SE W116 M116
1992 300E W124 M103
1994 E280 W124 M104
----------------------------------------------
"music and women I cannot but give way to, whatever my business" -Pepys
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  #2  
Old 05-23-2011, 06:02 PM
Brian Ostosh
 
Join Date: Mar 2007
Location: San Diego
Posts: 504
It could be the bearing,
it could be the swing axle internal universal and slip joint.

How many miles, ?

Jack up rear axle under the trailing arm and give it a shake.
If it feels like the wheel is pivoting at the outer bearing it is the inner.
Drain the fluid and check for metal chunks.
An outer bearing will just whirr, and not move too much.
You can do a bearing, an inner joint is fatal, get a complete junkyard/pick-a-part one to replace it.
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  #3  
Old 05-23-2011, 06:26 PM
chazola's Avatar
Registered User
 
Join Date: Nov 2003
Location: London, United Kingdom
Posts: 1,241
Hi, 141,000 miles, I changed the diff fluid about 500 miles ago and the old fluid came out clean, no metal in it.
__________________
1993 320TE M104
---------------------------------------------------
past:

1983 230E W123 M102
1994 E300D S124 OM606 (x2)
1967 250SE W108 M129
1972 280se 3.5 W108 M116
1980 280SE W116 M110
1980 350SE W116 M116
1992 300E W124 M103
1994 E280 W124 M104
----------------------------------------------
"music and women I cannot but give way to, whatever my business" -Pepys
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  #4  
Old 05-24-2011, 01:24 PM
Brian Ostosh
 
Join Date: Mar 2007
Location: San Diego
Posts: 504
Jack under the right rear trailing arm to get the tire off the ground 1" and run the through the gears.

That should determine clunks vs whirrs.

Use two persons one on the brake and throttle, one to listen.

I have run to speedo to 60mph that way.

clean oil and 141k should be ok unless of abuse.
I did have a left wheel bearing go noisy at 120k

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