A4 B7 - Inner CV Boot Replacement

**fly300kts** · 03-13-2010 06:13 PM

For information only, I will not endorse any responsibility.

Hi,

I finally found time to tackle this issue: Inner Boot Shaft replacement.
The outer side is pretty straightforward and I will talk about it a bit later but I could not find anything about the inner boot, and it’s the trickier one. So here we go:

Time: 2 Hrs
Difficulty: 4

Tools:
Generic
Triple Square 10mm
Allen socket 17mm

So here is your problem

Remove the rim center cap and parking brake ON. This will allow you to remove the big Allen screw.

Then, jack up the car and remove the wheel.
Remove the cross bolt securing the upper arms as well as the direction control arm.

You can use a small chisel to expand the arm

Slide the assembly on the side and you will be able to disengage the axle outer side.

Then, using the 10mm triple square, remove the 6 screws engine side and slide out the axle.
After securing the axle, using a razor blade (or other) cut the remaining on the boot as well as the old clamps. Clean any excess of grease. Not like this outer CV Joint where at this stage, you will be able to remove outside clip and slide out the tripod, for the inner joint, you don’t have access to the outer clip. With a hammer, hit the flange where the 6 screws were, until she slides off the tripod and you should end up with something like this:

Now you have access to the outer clip. Remove it and slide out the tripod

After a good cleaning of the different components, slide the part in this order:

Small Clamp
New Boot
Inner clip

Slide the tripod and come in contact to the inner clip. Then install the outer clip

Slide the boot in his final position and tight the inner clamp.

Empty the entire tube of grease inside the boot, install the outer clamp and secure.

Reinstall the axle on the car.

Let me know if any question

Phil

**illegitimus** · 03-13-2010 06:22 PM

As always, best DIY! Saved and subscribed. Thanks!

**Tusin** · 03-13-2010 10:43 PM

haha freaking awesome DIY. If it was me I would just replace entire axle. But I am kind of lazy:)

**Hyphy** · 03-14-2010 12:01 AM

i love my CPO :)

**FASTONE** · 03-14-2010 07:47 AM

Very nicely done Phil. A must keep for the DYI archives.

**Doctor** · 03-14-2010 07:59 AM

Excellent and really helpful...Thumbs up Phil, as always

**B72.0T** · 03-14-2010 12:12 PM

Nice write-up as always :)

**Tusin** · 03-14-2010 02:47 PM

Originally Posted by Hyphy

i love my CPO :)

As long as you keep it stock (which by your sig, looks like you are). But CPO doesn't matter two-bits once you do ANYTHING to the suspension, in regards to your CV Axel's.

**Sanjman** · 03-15-2010 12:49 AM

RANDY... Add it to the list!

**rensho** · 03-15-2010 09:45 AM

Great write up.

Do you use new bolts on the CV and a new Allen on the hub end? What size is that allen?

Might also be a great time to change the front bearing, since the shaft is out.

**fly300kts** · 03-15-2010 10:15 AM

Same bolts were used
As noted in the beginning of the DIY = Allen 17 mm
In reference to the bearings, my dad always told me: if ain't broken, don't touch it

Phil

**dynamic** · 04-11-2010 05:32 PM

It is also helpful to have some dowel pins and a mallet for removing the bearing set from the spline shaft. Mine was on there pretty good. When getting the arms to fit back on, some c-clamps were helpful as well. And I borrowed the crimping tool from Pep Boys. Thanks for the DIY. Helped a lot today!

**rs6** · 04-11-2010 06:03 PM

For the lazy, you can just get reman'd axles from Napa for (typically) less than $80 w/ lifetime warranty. They are original Audi axles. Beats spending the time and all that nasty grease.

**Nail Nutter** · 04-11-2010 06:19 PM

Hey Phil,

Axel bolts are commonly stretch bolts. You might want to take a look at those bolts from time to time to make sure they aren't backing off. I replaced an axel on my old VW and wasn't able to buy new axel bolts at the same time. I appropriately torqued the bolts when I reinstalled them, but was surprised to find several had worked themselves loose when I checked on them a year later.

**fly300kts** · 04-11-2010 06:28 PM

^^
Not mentioned in the DIY but I replaced them

Phil

**Nail Nutter** · 04-11-2010 09:04 PM

Glad to hear it. Great DIY!

**audidrver** · 06-18-2010 08:09 PM

Hey Fly where can i pick up those specific clamps and clampers at? Also will those work for the smaller ones, : for power steering lines.

**pape** · 12-07-2010 05:26 AM

just did this to my b6 without removing the axel from the car (pasengers side inner boot)

**fly300kts** · 12-07-2010 06:33 AM

Originally Posted by audidrver

Hey Fly where can i pick up those specific clamps and clampers at? Also will those work for the smaller ones, : for power steering lines.

Yes they should work and the clamps came with the repair kit

Phil

**derrek** · 01-28-2012 04:19 PM

Anyone have problems removing the 6 triple square bolts? Got 3 out but the other 3 wont budge with a 1/2 inch impact gun. I've already snapped one triple square socket.