Typ89

Hello,

I've got some issues. I have a B4 90 FWD, and was planing on replacing rear rotors. I got old ones off of a car tried installing new ones, but gave up on that because there wasn't enough space between the brake pads, tried installing old ones same problem. I can't seem to decompress piston, i removed the bleeder bolt that didn't help, I then removed the entire caliper took it to a shop and tried compressing it with a vice didn't move. I don't know what else to do, it freely moved forward, I tested it using e-brake lever on the caliper, now piston is as far in as it could possibly be.
Does anyone know how to decompress it?

CRAZY_RUSSIAN

OW MY... i hope u didnt destroy your caliper!
you have to rotate the piston while applying pressure on it, its its a pita, but its duable.
or you can get a special vw/audi brake tool that will turn the piston while the pressure is plyed

CRAZY_RUSSIAN

btw, its clockwise as you are looking at the piston

maineman

The rear caliper has to be turned while pushing in .You need the proper tool which sometime can be loaned or rented at some parts stores.Here's what it looks like. Do you have a repair manual?
A search for rear brakes or rear calipers would have got you some answers.hopefully you didn't ruin anything with the vise.
good luck

http://cgi.ebay.com/ebaymotors/NEW-B...motiveQ5fTools

CRAZY_RUSSIAN

yep, or check my sig on facebook, i posted a picture of the tools i used, worked out just fine for me :-D

Typ89

I thank you both very much, everything is put together now and I didn't destroy the caliper!

CRAZY_RUSSIAN

glad we could help :-)

Typ89

Hi again, is there a special way of bleeding brakes? It seems like no matter what I do they remain "spongy". By the way, I've finished installing my new rotors today, the size is stock but they're drilled and slotted, also zinc coated. They look nice but perform even better I'm still using my old brake pads and I've noticed a world of a difference. Will post pictures later.

CRAZY_RUSSIAN

stop wright there! replace the pads before they seat in with your new rotors!
otherwise youll have a set of rotors that are set in with the pads, then you replace the pads and the rotors will not seat in with the pads as they are supposed to again.
for some reason my repair manual keeps crashing at start up... but if i remember correctly start on the right rear first..

CRAZY_RUSSIAN

Bleeding sequence
1 - Brake master cylinder (if equipped with bleeder screws)
2 - Right-rear brake caliper
3 - Left-rear brake caliper
4 - Right-front brake caliper
5 - Left-front brake caliper