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DIY: Do It Yourself
Post here to share or improve your wrench turning skills! All BMW E46 DIY tips, tales, and projects discussed inside. Learn to work on your car and know the right BMW parts you will need!

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Old Yesterday, 05:42 PM   #1
crackerlee
Registered User
 
Join Date: Mar 2009
Location: Mass
Posts: 28
My Ride: 2003 325Ci Conv.
RTAB Replacement (DIY with Pics)

I had replaced my front lower control arm bushings about 2000 miles ago, with PowerFlex bushings. I wanted to replace my RTABs too before getting an alignment. I am replacing with Bav Auto Urethane bushings (http://www.bavauto.com/fland.asp?part=RTAB)

This is for a 2003 E46 Convertible. Yours may be slightly different.

Tools/materials needed:
18mm socket (with an extension) to remove the three RTAB mounting bolts
A second 18 mm socket or box wrench to remove the one RTAB center bolt
10mm socket to remove the one brake line bolt
17mm socket to remove lug nuts
Torque wrench
Floor jack
Jack stands
Block of wood, about 8" long
A little anti seize
Three hours of time

Torque #s:
Bracket center bolt (81 ft-lbs)
Three bolts holding bracket to car (57 ft-lbs)

1. rent yourself this tool. I got mine here: http://forum.e46fanatics.com/showthread.php?t=1071805
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2. Jack up and support your car.
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3. Before unbolting the RTAB bracket, carefully unclip the wiring that runs along the trailing arm, and unbolt the 10mm brake-line bracket.
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4. You'll want an alignment after this job, but try and re-install the bracket as close to aligned as possible.
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5.With the arm extended, you're ready to remove the old bushing.
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6. old and new bushing
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7. install the new bushing
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8. re-installing the bracket
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9. Finishing the job.
If you're installing rubber bushings you'll need to position the bracket (search for "RTAB preload") when tightening the center bolt (18mm). If not preloaded correctly, the bushings will be twisted under load and fail prematurely.
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