2005 A6 Avant rear caliper issue.

[Bloxie]

Hello,

i have a 2005 A6 avant. I went to replace the rear discs and pads as they had got to pretty much the backing plate on the pads.

i used vag com to open the caliber up after cycling it a few times via the button.

Got the caliber off ok and new disc and pads on, I went to put the caliber back on and it's not opened enough to accommodate the new pads and disc. They are the correct ones for the car.

I tried to fool the caliber into thinking it was back on with packing it out and tried to close and re-open the caliber via vag com.

something went wrong and now the caliber piston looks to be almost right out.

i removed the motor and seen if I could wind the piston back, it comes back some then wants to turn as I turn the piece where the motor slots in.

I have tried to push the piston back in as I turn it but it just stays put. If I reverse the direction the piston will want to push back out but it's already way too close.

Has anyone seen this before and have a solution? Or am I looking at a knackered calliper.

if I'm leaving info out you need let me know.

i appreciate the help.


Garry

[zollaf]

can you post a pic of the caliper pistn so we can see how far back it is, and what pads are you using.

[Bloxie]

Hi,

i am using Brembo pads and discs from GSF. I used the search against my reg to find the suggested ones. Here is the pic, I can't get it to retract more than that.



28242

[B5NUT]

You won't get it to go fully back using vcds, you will have to push the piston the rest of the way. I had the same problem when I did mine last year.

[Bloxie]

You won't get it to go fully back using vcds, you will have to push the piston the rest of the way. I had the same problem when I did mine last year.

Hi, the issue I have is I can't get a caliper rewind tool in. When I try and push it back its solid, that's even with the bleed nipple open. What did you use to push yours back?

[dan2485]

Once VCDS has released the parking brake you just treat the caliper as if it was a front caliper.

Pull back the gaiter to see if the piston has popped out of the caliper you may have to realign it back into the caliper.

[B5NUT]

You need one of these, you will never get it back by hand.
http://i1339.photobucket.com/albums/o708/exchange56/brakes/brake_piston_retraction_tool_zps5ba2211c.jpg

[dan2485]

If you have a set of waterpump pliers that should do

Bolt the caliper back on (no disc) then use a big screwdriver to lever the piston in.