S4 / RS4 (B5 Platform) Discussion Discussion forum for the B5 Audi S4 & RS4 produced from 1998-2002

when bleeding brakes with pedal action, ignition on or off ?

Thread Tools
 
Search this Thread
 
Old 10-09-2007, 08:01 PM
  #1  
New Member
Thread Starter
 
Audi8myBM's Avatar
 
Join Date: Jan 2007
Posts: 157
Likes: 0
Received 0 Likes on 0 Posts
Default when bleeding brakes with pedal action, ignition on or off ?

i know its a noob question, ive staf and no write ups specify. im thinking "off" but this question came up cos i have esp, which could possibly require a vag.

i broke the the fore brake pad bracket on front left caliper. new one on the way,so i figure i might as well do a bleed all the way around.

note to diy'rs: when installing front pads, make sure they are seated right and piston pushed(pump the brake) out to firm things up BEFORE you put the wheel back on.

thanks in advance for your help.

AUDI 4 LIFE!
Old 10-09-2007, 08:04 PM
  #2  
AudiWorld Super User
 
P. Bauer's Avatar
 
Join Date: Jan 2001
Posts: 11,288
Likes: 0
Received 0 Likes on 0 Posts
Default

off is fine.
Old 10-09-2007, 08:10 PM
  #3  
New Member
Thread Starter
 
Audi8myBM's Avatar
 
Join Date: Jan 2007
Posts: 157
Likes: 0
Received 0 Likes on 0 Posts
Default

Thanks.How do i avoid complications when swapping calipers/lines?
Old 10-09-2007, 08:44 PM
  #4  
AudiWorld Super User
 
UberVier's Avatar
 
Join Date: Mar 2001
Posts: 20,780
Likes: 0
Received 0 Likes on 0 Posts
Default I've done a couple caliper swaps on other cars and never had issues...

when bleeding I will swap between opening the bleeder a LOT and having large flow of fluid each pump, and also a LITTLE and having the person pumping having to work extra hard to get fluid out. Not sure if either is better, but like I said I've never had complaints. I doubt theres a lot of space for air to get trapped, anyway...
Old 10-09-2007, 09:06 PM
  #5  
AudiWorld Super User
 
inliner311's Avatar
 
Join Date: Jul 2002
Posts: 3,417
Likes: 0
Received 0 Likes on 0 Posts
Default make sure not to go all the way down on the pedal when bleeding...

this can cause damage to the master cylinder. I usually got about half to 2/3 just to be safe.
Old 10-10-2007, 04:15 AM
  #6  
AudiWorld Senior Member
 
S4_NE's Avatar
 
Join Date: Feb 2007
Posts: 1,253
Likes: 0
Received 0 Likes on 0 Posts
Default Re: just bleed mine the outher day...

and it was easy, if you are pumping the breaks go down about 90% of the way... but don't let the master clyender go dry, keep it up there, that is how i ahve allways do it. also keep the ignittion off.
Old 10-10-2007, 05:44 AM
  #7  
AudiWorld Super User
 
Hibiscus Red S4's Avatar
 
Join Date: Jun 2003
Posts: 4,644
Likes: 0
Received 0 Likes on 0 Posts
Default I'm going to be installing a rebuilt caliper as my boot has torn off on the right rear.

I'd be very interested in a bleeding procedure for this car. Does one exist? I don't have ESP. If there isn't one out there, I'll try to document it and do a write up that others can comment on.
Old 10-10-2007, 06:03 AM
  #8  
AudiWorld Senior Member
 
DriveS4spd's Avatar
 
Join Date: Jul 2004
Posts: 1,335
Likes: 0
Received 0 Likes on 0 Posts
Default Bleeding: there is a procedure. I looked it up a long time ago. 1st Pass rear

2nd : drivers side rear, 3rd pass front, then drivers front. If you aren't using a power bleeder you need to be careful not to let the brake fluid go too low bec that will damage the master cylinder. You need tor replace the fluid as you go. Need to bleed around 200 cc's per corner and ideally the slave cylinder above the tranny. About 100 cc's there iirc. W ESP you need to cycle the ABS too. 11 mm wrench for the bleeding screw, a small piece of tubing to go onto the nipple and a bottle to collect the fluid helps too. Hope that helps.
Old 10-10-2007, 09:09 AM
  #9  
AudiWorld Super User
 
Hibiscus Red S4's Avatar
 
Join Date: Jun 2003
Posts: 4,644
Likes: 0
Received 0 Likes on 0 Posts
Default

It definitely does - thanks a lot.
Old 10-11-2007, 02:00 PM
  #10  
New Member
Thread Starter
 
Audi8myBM's Avatar
 
Join Date: Jan 2007
Posts: 157
Likes: 0
Received 0 Likes on 0 Posts
Default Thanks guys, caliper went on w/o a hitch.....

Your feedback gave me the confidence to dig in and do my first DIY brake line job.

With the RIGHT tools, and a calm head any job on our cars is possible.

Im also finding that when i run into rank situations with my car AW'rs are the only ones who seem to care. I love this community!


Quick Reply: when bleeding brakes with pedal action, ignition on or off ?



All times are GMT -8. The time now is 09:28 PM.