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Old 05-01-2011, 10:05 PM
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Join Date: Aug 2007
Posts: 44
89 300se rear wheel bearings

need a little help on rear wheel bearing replacement on my 89 300se,seems pretty straight forward ,but i haven't taken the time to tear into it yet,i need some good info on procedure if anybody's willing i will take whatever advice i can get,they are not noisy but close to 300,000 miles on them,just got done with fronts,they were very easy,time to tackle the rears now.

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Old 05-01-2011, 10:40 PM
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Join Date: Dec 2007
Location: NorCal
Posts: 1,332
Rear wheel bearings are nowhere close to the fronts. You need to remove the large axle nut (200+ ft lbs), and then usually a special tool is needed to pull the old bearing out of the wheel carrier/hub. And then another to press the new bearing in straight.

If mine ever go bad, I am taking it to a shop. Or maybe buying new wheel carrier hubs and having the bearings pressed in outside the car, then just swap out wheel carriers. If yours are not noisy yet, I would leave them alone, honestly. I would spend the $$ and time on something else. Just thinking about the job makes me shudder.
1991 300E - 212K and rising fast...
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Old 05-02-2011, 05:59 AM
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Join Date: Oct 2004
Location: Grand Rapids, MI
Posts: 15,429
Not noisy = do not touch. Rear bearings are an involved process and not for those without all the special tools to be doing. I think I'd be glad they are running quiet and leave them alone!
-diesel is not just a fuel, its a way of life-
'15 GLK250 Bluetec 102k - mine - (OC-104,600)
'17 Metris(VITO!) - 26k - wifes (OC-25k)
'09 Sprinter 3500 Winnebago View - 57k (OC - 63k)
'13 ML350 Bluetec - 73k - dad's (OC-75k)
'01 SL500 - 92k(km) - dad's (OC-94,000km)
'16 E400 4matic Sedan - 122k - Brothers (OC-125k)
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Old 05-02-2011, 02:24 PM
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Join Date: Oct 2004
Posts: 4,087
The rear bearing on that car has a crush sleeve to set the preload. Even with the proper tools and know how the success rate of replacement isnt too high. Do not replace unless absolutely necessary.


90 300TE 4-M
Turbo 103, T3/T04E 50 trim
T04B cover .60 AR
Stage 3 turbine .63 AR
A2W I/C, 40 LB/HR
MS2E, 60-2 Direct Coil Control
3" Exh, AEM W/B O2
Underdrive Alt. and P/S Pulleys,
Vented Rear Discs, .034 Booster.
3.07 diffs 1st Gear Start

90 300CE
Milled & ported head, 10.3:1 compression
197° intake cam w/20° advancer
4° ignition advance
PCS TCM2000, built 722.6
600W networked suction fan
Sportline sway bars
V8 rear subframe, Quaife ATB 3.06 diff
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