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View Full Version : Rear Brake problem..Caliper piston will not retract.



JunkerAvant
01-26-2011, 06:23 AM
I have done rear brake jobs on Audis a million times, but this A4 has me stumped. I have the Bentley Manual on this car & the steps for changing the pads are exactly the same as the older B4 cars. So why can't I turn the piston back in? I'm using the OEM Audi tool to retract it but all it does is turn. It retracted just a little but not all the way. What am I missing? Is the E-brake lever inside jamming the piston from retracting?[headbang][>_<][confused]

BaconBait
01-26-2011, 12:34 PM
If it's turning I doubt it's the ebrake. Are you only turning it? It takes a bit of pressure to get it back in while turning it.

Wholsea
01-26-2011, 12:39 PM
A little bit of pressure? It's pretty tough to put enough pressure while turning without a caliper compression tool.

You mentioned a special VW tool, which is it?

I have the brake compression kit from harbor freight that has worked great for me.

Mine is a bit dated, it looks like they are selling this one now:
http://www.harborfreight.com/18-piece-disc-brake-pad-and-caliper-service-tool-kit-97143.html

BaconBait
01-26-2011, 12:43 PM
You can also rent the tool from Autozone for free (there's a deposit, but it's refunded when you return the tool).

Dallas09
01-26-2011, 01:25 PM
Is this special tool rotating the piston while it presses in? The rear pistons have to be rotated at the same time they are being pressed in, unlike the fronts.

BaconBait
01-26-2011, 02:41 PM
Yes.

grillhands
01-26-2011, 02:43 PM
A little bit of pressure? It's pretty tough to put enough pressure while turning without a caliper compression tool.

You mentioned a special VW tool, which is it?

I have the brake compression kit from harbor freight that has worked great for me.

Mine is a bit dated, it looks like they are selling this one now:
http://www.harborfreight.com/18-piece-disc-brake-pad-and-caliper-service-tool-kit-97143.html

I got the same kit. It works like a charm.

Dallas09
01-26-2011, 05:09 PM
yes
i shouldve read better.

.Mad Hatter.
01-26-2011, 05:50 PM
Is it just me, or are there 3 gun lovers in a thread with only 8 posts?

BaconBait
01-27-2011, 04:41 AM
Who are the three?

.Mad Hatter.
01-27-2011, 06:33 AM
you, grillhands, and wholsea

[>_<]

grillhands
01-27-2011, 02:41 PM
you, grillhands, and wholsea

[>_<]

lol... gotta have em

BenjaminR
05-08-2011, 10:57 AM
I just ran into this issue. In case anyone is creative and has a welder here was my solution. Took me all of 10 mins find the crap around my shop and weld it up.

Two simple measured out tack welds
http://i233.photobucket.com/albums/ee197/benrhayes/4-05%20Car%20pics/IMG_0113.jpg

Tacked nut on top to turn.
http://i233.photobucket.com/albums/ee197/benrhayes/4-05%20Car%20pics/IMG_0114.jpg

Done and done. Eat that $40 bs tool.