4.2 front wheel bearing
05-16-2012, 01:54 PM
#1
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4.2 front wheel bearing
My front driver's side wheel bearing just started to make noise.
I have the 4 bolt flange wheel bearings, which I understand you just removed the 4 bolts and the bearing comes off.
How does the hub seperate from the bearing? Is a press or puller still required?
Thanks!
I have the 4 bolt flange wheel bearings, which I understand you just removed the 4 bolts and the bearing comes off.
How does the hub seperate from the bearing? Is a press or puller still required?
Thanks!
05-16-2012, 03:34 PM
#2
AudiWorld Super User
Shouldn't require a press or puller with aluminum uprights.
The 4 bolt flange just comes off with the bearing...you get a new casting/bearing assembly.
Of course, you do need to remove the jesus bolt in the center of the axle (loosen it while wheel is on the ground and get a new one...it's an angle tightened bolt). I release the pinch bolt and drop the carrier (get a new pinch bolt too) and the axle/CV joint comes out and flop to one side while you replace the bearing/carrier.
Shouldn't take more than an hour or so.
Check the balljoints on the UCAs while you have the pinch bolt out and the UCAs released.
The 4 bolt flange just comes off with the bearing...you get a new casting/bearing assembly.
Of course, you do need to remove the jesus bolt in the center of the axle (loosen it while wheel is on the ground and get a new one...it's an angle tightened bolt). I release the pinch bolt and drop the carrier (get a new pinch bolt too) and the axle/CV joint comes out and flop to one side while you replace the bearing/carrier.
Shouldn't take more than an hour or so.
Check the balljoints on the UCAs while you have the pinch bolt out and the UCAs released.
05-16-2012, 09:10 PM
#3
AudiWorld Super User
No press there but...
you still have to get the bearing assembly separated from the hub center so you can reuse it with the new bearing-the 4 bolts are what loosen it from the large aluminum steering arm.
I just clamped the bearing assembly in a vise and drove the hub center out with a sledge hammer and an appropriately sized socket wrench that matched up with the diameter of the hub center. To reasemble it (in a home shop environment), I used the vise tightening pressure square on with the bearing assembly and the hub center to drive them together. Both steps could be done on a press of course, with less risk of damage to the new bearing assembly--removing the old one with pretty simple brute force hammering really doesn't matter since it gets tossed.
Don't strip any of the four retaining bolts on disassembly either. Use the appropriate wrench only square on with the steering arm secured from movement. Ask me how I know...drilling out even one hardened large bolt (on a drill press at that) was no fun.
I just clamped the bearing assembly in a vise and drove the hub center out with a sledge hammer and an appropriately sized socket wrench that matched up with the diameter of the hub center. To reasemble it (in a home shop environment), I used the vise tightening pressure square on with the bearing assembly and the hub center to drive them together. Both steps could be done on a press of course, with less risk of damage to the new bearing assembly--removing the old one with pretty simple brute force hammering really doesn't matter since it gets tossed.
Don't strip any of the four retaining bolts on disassembly either. Use the appropriate wrench only square on with the steering arm secured from movement. Ask me how I know...drilling out even one hardened large bolt (on a drill press at that) was no fun.
Last edited by MP4.2+6.0; 05-16-2012 at 09:14 PM.
05-16-2012, 09:47 PM
#4
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Great! exactly what I needed to know.
The 4 bolts look like triple square head (or 12pt whatever u call them), for which I have the appropriate tools.
Thanks!
The 4 bolts look like triple square head (or 12pt whatever u call them), for which I have the appropriate tools.
Thanks!
06-24-2015, 03:12 PM
#6
AudiWorld Senior Member
06-24-2015, 04:05 PM
#7
AudiWorld Super User
Huh? The bearing assembly comes with a new bearing pair.
you still have to get the bearing assembly separated from the hub center so you can reuse it with the new bearing-the 4 bolts are what loosen it from the large aluminum steering arm.
I just clamped the bearing assembly in a vise and drove the hub center out with a sledge hammer and an appropriately sized socket wrench that matched up with the diameter of the hub center. To reasemble it (in a home shop environment), I used the vise tightening pressure square on with the bearing assembly and the hub center to drive them together. Both steps could be done on a press of course, with less risk of damage to the new bearing assembly--removing the old one with pretty simple brute force hammering really doesn't matter since it gets tossed.
Don't strip any of the four retaining bolts on disassembly either. Use the appropriate wrench only square on with the steering arm secured from movement. Ask me how I know...drilling out even one hardened large bolt (on a drill press at that) was no fun.
I just clamped the bearing assembly in a vise and drove the hub center out with a sledge hammer and an appropriately sized socket wrench that matched up with the diameter of the hub center. To reasemble it (in a home shop environment), I used the vise tightening pressure square on with the bearing assembly and the hub center to drive them together. Both steps could be done on a press of course, with less risk of damage to the new bearing assembly--removing the old one with pretty simple brute force hammering really doesn't matter since it gets tossed.
Don't strip any of the four retaining bolts on disassembly either. Use the appropriate wrench only square on with the steering arm secured from movement. Ask me how I know...drilling out even one hardened large bolt (on a drill press at that) was no fun.
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06-25-2015, 08:52 AM
#9
AudiWorld Member
Just as some additional info for searchers...
http://www.vaglinks.com/Docs/Audi/C5...gServicing.pdf
Most if this also applies...
http://www.vaglinks.com/Docs/Audi/C5..._CVBootDIY.pdf
Cheers
Massboykie
http://www.vaglinks.com/Docs/Audi/C5...gServicing.pdf
Most if this also applies...
http://www.vaglinks.com/Docs/Audi/C5..._CVBootDIY.pdf
Cheers
Massboykie
