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General E46 Forum
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Old 06-15-2012, 02:58 PM   #1
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Please check this pic!

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Old 06-15-2012, 03:01 PM   #2
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There is a cut on the rubber part. Is this normal? I have a clunk noise from rear. You think that becouse of this? The other side also same . Please some advise. Thanks in advance
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Old 06-15-2012, 03:02 PM   #3
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Your shock mounts should be changed regardless. Don't forget to pick up z3 reinforcement plates.
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Old 06-15-2012, 03:32 PM   #4
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Mango, is this broken! What is z3 rainforcement?
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Old 06-15-2012, 03:35 PM   #5
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I can't tell but they do look worn. Any excess wear and your shock will be saying hello to the interior of your car if not forcing its way right through it. Z3 reinforcements give your shock towers extra protection by dispersing energy over a broader area. an absolute must.

http://www.ecstuning.com/BMW-E46-328...sion/ES130271/

Part# 51718413359



This is what can happen without it:



And yes i've seen this personally on a few cars. Not fun nor pretty. Very costly to repair.
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Old 06-15-2012, 04:34 PM   #6
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Oke thanks mango
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Old 06-15-2012, 04:53 PM   #7
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That looks like the shock tower on my e36 M3... Yes, very costly to repair & repair again after the 1st repair fails. This failure didn't cause a clunk sound though, it was a metallic squeaking when things were still connected & eventually a knocking over any bump or rough surface when the shock ripped off completely. 1st thing I did when I got my E46 was buy the reinforcement plates & change to better mounts.

When I had an actual 'clunk' from my rear, it was the RTAB completely shot & bouncing around inside the pocket. The photo you attached will only cause a clunk if you hit a really big bump as that is a picture of the bump stop. Hitting this bump stop constantly is also not good for the shock tower area either... If you are constantly hitting the bump stops, you have other issues & may need a reduced weight right foot modification. The right foot weight reduction mod is a fairly easy DIY though.
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Old 06-15-2012, 05:03 PM   #8
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spl15, thanks for reply, it is a 98 model e46 328i. I checked that part with my hand and it seems oke. now I am confused. Does shock mounts look like that or there shouldnt be a cut like in the picture.? I have a clunk noise from rear when ever i changed the gear. I am getting crazy witk hat sound. I thought this is the couse of this sound but i dont know it seems oke. what s your idea ?
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Old 06-15-2012, 05:06 PM   #9
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Probably your subframe or differential bushings--or worse yet, a torn subframe mounting.

Your RSMs should be changed regardless. They're not an item that wears nicely.
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Old 06-15-2012, 05:19 PM   #10
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You got an issue with some bushing in the rear... Be hopeful it is the RTAB because the other ones are a real pain to change. The RTAB costs around $100 to do completely with shims & tool rental. Subframe/differential bushings can get pricy to do as you need an assortment of bearing pushers/pullers & 'while you're in there' you might as well do them all since you have to drop the subframe.

Also, your car is within the year range that subframe mounting location failure was known to be a significant issue... Take it easy on things until you get it checked out & start saving your money or start drafting a Craigslist Posting. Search 'subframe failure' & be sure to sit down as you read...
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Old 06-15-2012, 05:22 PM   #11
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Sit down and have plenty of Simple Green, Windex, and paper towels nearby.
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Old 06-15-2012, 05:29 PM   #12
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These are the recent pictures. They look oke for me ! Am i wrong? What s that cnocking noise? I am getting craxy. Subframe oke.
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Old 06-15-2012, 05:31 PM   #13
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I nearly spit my drink when I saw those pics. Are you seriously lifting the car by the rear differential? Uhh....
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Old 06-15-2012, 05:43 PM   #14
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No there is another lifts this only for safety. Mango can you pls give your idea about these pictures. I think diff rear bushing is oke also other.
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Old 06-15-2012, 05:45 PM   #15
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And sorry for my bad english.
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Old 06-15-2012, 05:47 PM   #16
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You can't tell the condition of bushings by looking at a picture unless they're absolutely destroyed. Chances are you need new bushings. And the subframe mounting locations need to be cleaned off in order to properly inspect them. you know what to look for right?

and your english is fine.
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Old 06-15-2012, 05:53 PM   #17
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Oke mango, i will change all the bushings in the rear. I will appreciate if you can give a rear bushing list? So i can go trough it. And do you have any idea how much can it ciat changing all bushing in the rear
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Old 06-15-2012, 06:03 PM   #18
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You likely don't need to go this far but this is complete. You need a more thorough inspection done to figure out which bushing it is. This can get quite expensive. if you are DIYing or have access to cheap labor or require much of the rear end to be torn down, you might want to look into replacing it all.



Rear control arms/ rtab (PER SIDE so you'll need two of each--one per side)

33326775551
33326771828
33326770786
33321092247
33326770824



Subframe:

33316770783
33316770784
33316770781 x 2

Differential:

33176770788 x2
33176751808
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Old 06-15-2012, 06:12 PM   #19
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Thank you very much
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Old 06-15-2012, 06:52 PM   #20
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Another thing that can cause a clunk that seams to come from the rear is if your driveshaft center support bearing is toasted. When mine went, it started out as a thump when shifting & then grew to a constant knocking under any drivetrain load. The cause was a binded universal joint in the drive-shaft.
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