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4squared
11-17-2010, 10:15 AM
When I bought my a4 the rear wheel bearing was bad. The guy gave me the bearing and a spare knuckle. I got a Haynes manual and it seems pretty straight forward. The one question I had was when removing the hub to disconnect the axle is there a special tool that is needed or is just a 14mmm hex bolt?

Emilgevor
11-17-2010, 10:17 AM
Yeah after removing all the control arms and sway bar link, use the 14mm hex to remove axle bolt then everything should just come apart.
Don't try to remove your own bearing i believe its pressed just like on S4s

4squared
11-17-2010, 10:42 AM
Yeah I know its pressed. I have a spare knuckle, and had the bearing already pressed in. I just wanted to make sure it was just a 14mm hex and not some special tool. Thanks!

Emilgevor
11-17-2010, 10:49 AM
yeah mine was just 14mm which was a bitch to take off but i replaced it with bolt and put shit load of anti seize

4squared
11-17-2010, 11:00 AM
Replacing it with a bolt, thats a solid idea. Do you know what bolt you used? Also where did you get the hex at? I work at Advance and we only carry up to 10mm. Same with Autozone.

Emilgevor
11-17-2010, 11:11 AM
I got mine from napa. I think it was around 8 bucks. Come to the counter and ask for it and they will try to sell you whole kit for like 60 bucks but ask them if they sell individually and they will.
Also my bolts came with my wheel bearings I believe you can buy them separately too just search axle bolts on google...

danphines
11-17-2010, 11:40 AM
Sears sells the hex. Use a long extension on the end of a breaker bar and it is so easy. I used a 4 foot long big black steel pipe at the end.

4squared
11-17-2010, 12:04 PM
Yeah thats what I was going to do. I went to do it not knowing it was 14mm and got a 9/16th. Kicked myself for that.

Gambit0714
11-17-2010, 12:29 PM
I just did this same job on my A4. Purchased the 14mm @ Autozone. But I used a 625 ftlb impact wrench. Much easier. :-D

4squared
11-17-2010, 12:33 PM
I just did this same job on my A4. Purchased the 14mm @ Autozone. But I used a 625 ftlb impact wrench. Much easier. :-D

Thats where I got the 9/16th. Was it a three pack? They were out of the MM three pack I think.

Gambit0714
11-17-2010, 02:36 PM
Yes it was a three pack.

FNK
11-17-2010, 03:11 PM
Me, I removed the whole arm, pressed the bearing out. Sandblasted the arm and repainted (somewhat pointless), Pressed a bearing in, used a brand new bolt and new fasteners. Work like it's supposed to.

If you are, or someone else, pressing the bearing, make sure to press it the right way, or you will damage the bearing and in not so far you will have to do it again.

4squared
11-17-2010, 07:12 PM
Me, I removed the whole arm, pressed the bearing out. Sandblasted the arm and repainted (somewhat pointless), Pressed a bearing in, used a brand new bolt and new fasteners. Work like it's supposed to.

If you are, or someone else, pressing the bearing, make sure to press it the right way, or you will damage the bearing and in not so far you will have to do it again.

I know Audi recomends using new hardware. If I don't will there be problems? And how do I tell if it's pressed in wrong?

FNK
11-17-2010, 07:49 PM
Using new hardware; Yes! The axle bolt can snap because it's not designed to be used 2 times or more (some do it, but for a 4$ bolt vs the cost/job involved for the other way around...)
Using new fastener; Yes and no, bolts are mostly used in shear resistance. If you can remove it without heating it or damaging it AND it's not deformed, you can reuse it. As for the nut, most likely not, as the nylon patch (to prevent loosening) will be destroyed in the process ( 0,15$ a piece is not costly and can be found at any hardware store).

4squared
11-17-2010, 09:09 PM
Any way you could post a picture of said pieces so I can go before I disassemble the rear?

FNK
11-18-2010, 04:55 AM
http://img.eautopartscatalog.com/hires/W01331733883.JPG?width=160&height=160
Axel bolt

4squared
11-18-2010, 10:18 AM
Thanks FNK! I'll let you know how it goes.

MrPibb
11-18-2010, 11:50 AM
Wow, must be the time of year. My front wheel bearing is starting to wear out. making all kinds of noises around turns and such, is doing the front basically the same as the rear?

CrtchRktRcr
11-18-2010, 12:02 PM
Sears sells the hex. Use a long extension on the end of a breaker bar and it is so easy. I used a 4 foot long big black steel pipe at the end.

was that necessary?

haha


i know the bearings are a huge issue with our b5's, has anyone done a write up yet? Maybe the OP can snap some pics.

FNK
11-18-2010, 01:35 PM
Front use the same bearing are rear, at least on my 2.8...
Procedure is similar, the difference is the rear vs front control arm.

4squared
11-18-2010, 04:34 PM
was that necessary?

haha


i know the bearings are a huge issue with our b5's, has anyone done a write up yet? Maybe the OP can snap some pics.

I'll do a write up to the best of my ability. I am going to do it tomorrow if the weather is nice.

FNK
11-18-2010, 07:02 PM
PM me your email, I have a PDF of the procedure with exploded view from the service manual.

4squared
11-22-2010, 09:31 PM
Replaced the wheel bearing, took about 6hrs in the dark. Only causality the wheel speed sensor. There was no way it was coming out so I had to break it. Even after I tried to get it out and it wouldn't budge. Sprayed 1/4 a can of PB in there. New question, am I in danger of dying now lol? Ok thats an exaggeration, but will I encounter any problems.

How hard is it to replace the sensor?

FNK
11-23-2010, 04:43 AM
You could just have unplugged it, do the job even if it was still there...

Most end up hammering it with a socket to push it all the way, sawed the plastic end prior to.
You can twist it with plier since it's already broken, you might need to remove your axle to hammer the sensor out it's socket.

Are you in danger, no but until it's repaired you won't have ABS.

4squared
11-23-2010, 06:09 AM
It was 1130 and I had a 8am class. I honestly just wanted it done. My mom works for an import parts wholesaler so I have her getting me a price. Ive lived without abs before so I think I can manage till then. I'm just glad it doesn't sound like a jet engine taking off in my car anymore.