[Biturbos4] Rear caliper pistons on B5

Keman keman at interwolf.net
Mon Jan 3 02:16:49 EST 2005

FWIW- you shouldn't have to worry about any damage to your calipers.

The emergency brake auto-adjuster is designed to handle all the clamping 
force necessary to engage the E-Brake. This is thousands of pounds of force, 
something your pep-boys wrench is doubtful to have produced. It'll bend 
before there is a problem.

Good luck getting the right tool... (I see other posts detailing it well) it 
can be done without it but it's a (*@# to turn the pistons using a 
screwdriver in the not-flat slots of the piston. Once you get the piston to 
start turning, it's easier. Lube up the boot/piston with a little spray 
penetrant so the boot doesn't try to twist/tear with the piston. The boot 
stays still, the piston turns inside it.

- Keman

----- Original Message ----- 
From: "Jonathan Conta" <jonnyconta at yahoo.com>
To: <biturbos4 at audifans.com>
Sent: Sunday, January 02, 2005 9:11 PM
Subject: [Biturbos4] Rear caliper pistons on B5

: Apologies ahead of time if this has been covered - I'm new to the list.
: I spent a day this past week swapping out my stock pads (2000 S4 otherwise 
currently unmodified - yet....) for some Mintex "red box" pads, both front 
and rear.
: When changing the rear pads I was able to get the stock pads out without a 
problem, but when I went to compress the caliper pistons to fit the new ones 
in, I had a hell of a time getting them to retract back into the caliper.  I 
bought one of those pad compressor tools at Pep Boys and nearly ruined the 
thing putting so much torque on it pushing the pistons back in.
: Has anyone else run into this?  Or am I staring some 
sticky/about-to-freeze caliper pistons in the face?  I did eventually get 
them back in and the new pads on, and I must say my initial experiences with 
the Mintex pads have been outstanding - much more even braking, less 
"grabby" than the stock pads, and significantly less brake dust.
: Thanks much,
: Jon 

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