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General E46 Forum
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Old 03-21-2014, 12:42 PM   #1
comova
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Join Date: Apr 2007
Location: City of Angels
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My Ride: Silver 325Cic
Lower Control Arm, Rear Shocks & Differential Oil, oh my.



Before starting this weekend's DIY (if parts arrive) I wanted to ask the forum a couple quick ones:

1. Any quick tips on removing broken lower control arm bolt (the one blocked by differential)

2. First time doing rear shocks, anything I should look out for?

and

3. Should I change the differential oil while I am down there?
I don't think it's ever been replaced, well not by me anyway...138K on the odometer.


Wish me luck.
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Old 03-22-2014, 09:09 AM   #2
markusmarkus
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3. Yes! I use Redline 75w-90 for non-limited slip differentials. You'll need a quart but be careful when filling. Why? The differential takes exactly a quart of lube! Also, remove the FILL plug FIRST. Why? If you drain the differential and can't get the fill plug out you're stuck!!!! After that many miles that fluid will be nasty.

2. Change the upper shock mounts when changing the shocks. Some owners buy the shock mounts from a Z3 as they are more robust. I use the ones for my car (2001 330Ci).

1. Removing a broken bolt isn't too hard. Which bolt is broken as the rear LCA has several bolts attached to it.


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Old 03-22-2014, 10:03 AM   #3
hvactim
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Which z3 upper shock mount


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Old 03-22-2014, 10:21 AM   #4
comova
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Sorry MarkusMarkus, the actual control "arm" broken, not the upper bolt. I loosened the differential to get it out, sounded easier in the DIY.



Update
New control arms are in the car but have to speak with local mechanic about getting everything torqued down. My torque wrench doesn't go up to the 110 Nm the front differential bushings & control arm bolts need. :/

Still waiting on hardware (shocks)

Thanks for the tip on differential.
~CV
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Last edited by comova; 03-22-2014 at 10:23 AM. Reason: added image
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Old 03-22-2014, 10:39 AM   #5
cvx5832
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Just get yourself another torque wrench rather than taking it to a mechanic. They're not expensive at all.
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Old 03-22-2014, 11:22 AM   #6
comova
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Any suggestion on a good one (that's not too expensive)?
This $100 job is starting to get 'spendy, I still need to get the alignment done.
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Old 03-22-2014, 11:43 AM   #7
yoyomin
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You could get those electronic torque adapters for under $100. The torque range on those is really wide. I have the AC delco one and I've been using it for a while.
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