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General E46 Forum
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Old 05-27-2012, 01:11 PM   #1
DKTim
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Rusted dust shield? Don't want to damage bearings by removing hubs? look here!

My dust shields are so rusted that I can no longer mount my parking brakes.

I inquired into replacing them, however that meant removing the hubs, the local shop who quoted me said by doing so you will likely need new wheel bearings.

Firstly, remove your dust shield, it is held on by two 10mm bolts, and 2 very thin 16mm bolts.

I used a wire brush to clean off the rust, and some liquid wrench to loosen them. You will not be able to use a socket wrench, because it is too big to fit in behind the hub flange.

I should mention that the two 16mm bolts are so damn thin, that your wrenches will likely not be able to grip onto them.

Once I removed the old dust shield, I then took my new dust shield and I cut an opening large enough to slide over the hub, while still keeping the mounting holes intact. See pics for details. Notice I spray painted the dust shield, because I damaged the paint when I cut them and I did not want them to rust prematurely.



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Old 05-27-2012, 01:56 PM   #2
Roby G
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Cheap DiY ! but take a look all the other rusty areas ... that lower damper is rusted, hub and bearing area rusted, crusty brake calipers .... how many miles on the car ?

my left rear wheel bearing just blew out with a loud holler on the freeway !
after 80k mi .... sourcing parts now

take heed ! do pro-active maintenance 1st ... looks a 3rd priority
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Old 05-27-2012, 02:07 PM   #3
DKTim
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Car has 170,000 KM, all oh which took place in Canada...

Fortunately there is no body rust.

Yes I do notice all the rust on those components. I am quite proactive in maintenance.

I have a full cooling kit + CCV in my garage. I recently had it to a shop, they told me I need new struts and tie rod links. Due to my lowered suspension.

I plan on picking up all new struts, sway bar links and vanos seals soon.

also need to replace 2x wheel speed sensors up front.
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Old 07-16-2012, 10:59 AM   #4
betelgeuse
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Quote:
Originally Posted by DKTim View Post
My dust shields are so rusted that I can no longer mount my parking brakes.

I inquired into replacing them, however that meant removing the hubs, the local shop who quoted me said by doing so you will likely need new wheel bearings.

Firstly, remove your dust shield, it is held on by two 10mm bolts, and 2 very thin 16mm bolts.

I used a wire brush to clean off the rust, and some liquid wrench to loosen them. You will not be able to use a socket wrench, because it is too big to fit in behind the hub flange.

I should mention that the two 16mm bolts are so damn thin, that your wrenches will likely not be able to grip onto them.

Once I removed the old dust shield, I then took my new dust shield and I cut an opening large enough to slide over the hub, while still keeping the mounting holes intact. See pics for details. Notice I spray painted the dust shield, because I damaged the paint when I cut them and I did not want them to rust prematurely.




I need to do this. A few questions.
What did you use to cut the dust shield(s)?
You mention that you can't get a wrench on the 16mm bolts. How did you get them out?
Someone should manufacture a dust shield with the opening already in it. They'd get rich quick.
Thanks in advance,
Greg
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Old 07-16-2012, 12:16 PM   #5
DKTim
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Greg,
Use "metal shears" in order to cut the dust shield. You can by them almost anywhere... they look like this http://i9.photobucket.com/albums/a88...nShearsSet.jpg


The reason you cannot get a normal wrench on those 16mm bolts is because the bolts are so damn thin. If you look at your wrench set, you will notice they have rounded edges on the wrench face. This is to help you slide the wrench onto a bolt, but a bolt this thin simply slips off those rounded face.

There are two things to do, one is find a wrench that is nice and flat with no rounded edges (I was lucky to have a cheap Walmart brand wrench that had a flat face). Or you can take a grinder to the wrench and flatten it out!

Here is a picture of the rounded face (fillet) that I am talking about

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Old 07-16-2012, 12:56 PM   #6
betelgeuse
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Thanks Tim.
This seems to be one of the best time/money saving DIY threads.
Has anyone else replaced the rear dust shields using this method?
Greg
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Old 05-07-2015, 04:11 PM   #7
GaborVertesi
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I have a feeling I'll have to replace my dust shield too as the "lovely" previous owner did not care about these things. when I opened up today to change rotor, parkbreaks and pads one of the pin fell out as it was totally corroded... we've tried to fix it on an alternative way... did not work. I had to order a set of pins and springs but might need to change the shield due to the hole can be overly corroded....

but this above looks to be a very helpful hint.
My only question is since than have you had a look inside? My only worry if I leave that surface open might more chance that contamination is getting inside the rotor. do I have to worry about it?
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Old 05-07-2015, 04:55 PM   #8
Mango
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Good idea. Can you show the piece you cut out? Hard to tell from the pics. Making sure we aren't losing a mounting point. Also would be nice to see exactly how much to cut out.
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Old 05-08-2015, 07:42 AM   #9
jeepo23
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Right here..

http://www.pelicanparts.com/BMW/tech...eplacement.htm

I did this in the fall, works perfect, and you don't lose any mounting points.
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Old 05-08-2015, 08:03 AM   #10
paraklas
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You do loose the protection of the brake adjustment screws, and some sort of protection of the brake mechanism. Personally I wouldn't had cut it entirely, I would make a slot, bend it, then bend it back to shape and spot weld, only if the bearings were in perfect shape.
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Old 05-08-2015, 08:10 AM   #11
jeepo23
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Originally Posted by paraklas View Post
You do loose the protection of the brake adjustment screws, and some sort of protection of the brake mechanism. Personally I wouldn't had cut it entirely, I would make a slot, bend it, then bend it back to shape and spot weld, only if the bearings were in perfect shape.
Easier said then done.. Even that size cut the thing still goes over pretty tight and has a hard time clearing the shaft.

If you cut any less and bend the thing will break in half. I tried cutting the very minimal and seeing how I can get it on there it simply does not work you need to cut exactly what's shown..

Also welding to this thing prob won't work very well as the shield is quite thin..
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