It isn’t uncommon for CV boots to go bad – I blew out mine on a track day, but if your car goes through extreme temperatures (hot or cold) or you otherwise drive hard on the track or whatnot, inevitably you’ll blow out a CV boot. You can take it to the dealer and have them fix it, or you can DIY and save yourself a lot of money – it takes about two hours to complete, and is moderately difficult to perform. This DIY is courtesy of Phil aka fly300kts, who was kind enough to share it here with readers of Nick’s Car Blog. If you need clear corner caps, a ballast rebuild, or need help with your B7 Audi headlights, he is your man! But if your CV boots look like the above where the boot is torn and grease is everywhere, then it’s time to replace on your own, and that is where this DIY comes in handy. To do this, you might need a few specialty tools outside of your normal toolbox, including a Triple Square 10mm and a Allen socket 17mm.
To start, remove the center cap of your wheel with your parking brake ON and remove the big allen screw in the middle of the hub. Doing this before you jack the car up will help you get more leverage, although if you can’t get the center caps off without removing the wheel first then you should be okay to jack the car up and take the wheel off first. The bolt will look like this:
Next, jack the car up and remove the wheel. Then remove the cross bolt securing the upper arms (do not remove the upper control arms themselves though, this is the bolt below them!):
Also remove the bolt for the steering/directional control arm:
You can now 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, like this:
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 grease. For the outer CV Joint you will be able to remove outside clip and slide out the tripod, but for the inner joint, you don’t have access to the outer clip yet.
To reach the inner CV joint, hit the flange with a hammer where the 6 screws are until it 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:
Next, slide the boot in his final position and tight the inner clamp.
Lastly, empty the entire tube of grease inside the boot, install the outer clamp and secure…then you’re done replacing the CV boot!
Now, just reinstall the axle on the car. Be sure to torque to the correct values:
- M8 bolt: 40 Nm
- M10 bolt: 65 Nm
For the next step a second person is required. The first person gets into vehicle and presses brake pedal, while the second person tightens hex bolt for drive axle to initial torque. Use these torque settings:
- Hex bolt (M14): 115 Nm
- Hex bolt (M16): 200 Nm
Last but not least, install wheel and lower vehicle to the ground. Turn the bolt securing drive axle an additional 180°(1/2) and you’re all set!
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