[NickG]

Did you get it sorted?

Not as yet, there's not enough pressure in it at all, certainly won't be able to lock up the ABS :evil:

I'm looking to take it to Jabbasport as they're all of 200 yrds up the road, at least then it should be done (Or some alternative fault identified!).

 

[NickG]

This is becoming a pain in the arse!!!

I've taken her for a spin today, there's barely any pedal, to the extent where you can slam it to the floor whilst doing 30mph and you'll come to a gradual stop... No chance of locking up ABS!! So I've pulled her back onto axel stands, found that one of the rear lines hadn't seated properly so I've taken that off, cleaned that up and it seems fine now.

I wonder if it's possible the master cyclinder has bust? It would be a massive coincidence, but I can't make a firm pedal even with the engine off, so does this rule out it just being air in the system??

 

[NickG]

Update: I lied, I can just about make a firm pedal with the engine off...just!

 

[Dieseljuice]

Hi - Hope this helps....I did this for my Golf Mk5 and used Vagcom to bleed brakes.

Link for info http://www.andrewhope.co.uk/automotive/ ... epair.html

I found a few write ups and made the best of them all.

What I did was get a cheap GUNSONS EEZIBLEED EASYBLEED kit and 1/2 filled it with clean brake fluid and connected to mater cylinder and laid it on it's side above the master cyl so that as fluid was pumped out the bleed nipples the master cyl was automatically filled.

Now to vagcom and bleed nipples. Again I bought some brake bleed tube from ebay like http://www.ebay.co.uk/itm/Quality-Car-A ... SwwbdWG-CC but I made it longer using clear silicon tube so you can see bubbles if you need to.

I then opened front 2 bleed nipples with silicon pipe connected and each ending in a glass jar to catch the brake fliud.

Then do the vacom bit ....found a copy of a post by someone (sorry don't have link but this is what I used) so thanks to the guy who wrote it:

For future update

tools & stuff you need
brake fluid (3L)
2 x 11mm spanners
2 x bleed tubes with one way valves on
2 x receptacle at least 1L in capacity
first you need access to the front bleed nipples, i jacked up the front, placed on axle stands and removed both
wheels.
then put the spanner, bleed tube and receptacle on each side.
open the brake fluid resevoir and have your fluid ready to keep the resevoir topped up at all times. i got a
friend to do this to speed things up, it's probably possible on your own but will take a while longer.
goto ABS, basic settings blah blah whatever it is and click from 000 up to 001 and then you get a MSG on the
screen saying "PRESS AND HOLD PEDAL" or words to that effect. whilst doing this the ABS pump is activated
and the pedal can be felt kicking back
(002) it stops pumping and your told to relase the pedal and open the front 2 bleed nipples, then you need to
click to continue
(003) it will tell you to wait for 10 secs whilst the ABS pump is activated and fluid is pumped out of the now
open bleed nipples
(004) it tells you to pump the pedal 10 times and then close the bleed nipples, then you need to click to
continue
(005) "PRESS AND HOLD BRAKE PEDAL" untill told to stop
(006) it stops pumping and your told to relase the pedal and open the front 2 bleed nipples, then you need to
click to continue
(007) it will tell you to wait for 10 secs whilst the ABS pump is activated and fluid is pumped out of the now
open bleed nipples
(008) it tells you to pump the pedal 10 times and then close the bleed nipples, then you need to click to
continue
(009) "PRESS AND HOLD BRAKE PEDAL" untill told to stop
(010) it stops pumping and your told to relase the pedal and open the front 2 bleed nipples, then you need to
click to continue
(011) it will tell you to wait for 10 secs whilst the ABS pump is activated and fluid is pumped out of the now
open bleed nipples
(012) it tells you to pump the pedal 10 times and then close the bleed nipples, then you need to click to
continue
(013) "PRESS AND HOLD BRAKE PEDAL" untill told to stop
(014) it stops pumping and your told to relase the pedal and open the front 2 bleed nipples, then you need to
click to continue
(015) it will tell you to wait for 10 secs whilst the ABS pump is activated and fluid is pumped out of the now
open bleed nipples
(016) it tells you to pump the pedal 10 times and then close the bleed nipples, then you need to click to
continue
(017) ABS BLEED PROCESS COMPLETE!
once your done approx one litre of fluid will have been expelled from each caliper
points to note, i did not go full travel on the pedal every time, i probably only used about 75% of the pedal
travel and i pumped the pedal slowly to prevent damaging the master cylinder seal which everyone is always
banging on about.
so from the above you can see it's 4 complete cycles, not 17 cycles as someone suggested but 17 is the
number you'll see on the left at the end when it says it's completed
losvre is offline



Back to my bit.

So I did the above but I must say I did not do it 17 times....I think I did maybe half that and after each vagcom pump...before I did it again I shut bleed nipples and topped up bottle with brake fluid.

I bought 3 litres and it took just over 2 to do the lot. I did front 2 first at same time. then back 2.

Worked for me but I agree it takes a bit of planning.

Hope this helps.

 

[rusTTy_racer]

So I fancy bleeding with VCDS as over the last few years I have replaced all my metal pipes plus new braided hoses and re-furbed the calipers too and hope this will give me the pedal feel I'm after. Don't get me wrong the brakes are good and the pedal feels fine but I'm thinking it could be 10% better that would make me even more happy

I have a pressure bleeding kit and recently performed a standard bleed at 1.0 bar getting a few bubbles as I went.

Questions are; the description above when using VCDS to bleed the ABS unit only appears to bleed the front brakes - is there another basic setting to do the same on the rear?
If you are bleeding both sides at the same time do you increase the pressure (I did see on ross tech the mention of 2.0 bar) as the ABS will be 'open' anyway?

Any help for somebody who has been there appreciated

 

[Dieseljuice]

Sorry I never checked back after my last post.

So I've just done this on my daughters 2005 TT 1.8T 2WD using VagCom and the method I wrote above.
Although VagCom goes on 17 times to bleed fron brakes and ABS unit I only did it about 6 times then exit the procedure as the pedal feels fine and no more air bubbles and fluid looks like new clean stuff....used about 1.5 litres of fluid. I'm pretty sure I used VagCom and same method afterwards to do my Mk5 golf rear brakes but on the TT I just did the manual 20x brake pedal for each rear side and all is fine.

Now I have to change the clutch soon and that alternator regulator ...which I've tried already but I do not have the tools to remove that bottom screw without removing the water pipe which I do not want to do. So will look further to find a philips screwdriver tool to fit the limited space.

Still a good car so worth the effort and low cost if I can do it myself.

Cheers

 

[John949]

Took about 3L of fluid using the VAGCOM procedure, but I had changed the modulator and you must use VAGCOM if you have changed the modulator or let the master cylinder run dry (easy to do as VAGCOM chucks a lot of fluid through. I used two of those non-return valve thingies (you only open the front calipers to bleed the moduator.) I found the procedure very confusing and it kept telling me to close the bleed nipples without having first opened them. I'm a bit suspicious that Ross-Tech haven't 'reverse engineered' the procedure correctly.

If you've only drained a caliper line then you should be able to use a conventional bleeding technique e.g a pressure bleeder.

 

[John-H]

Yep. I've only used the full procedure when I took the ABS pump out. At all other times I've just bled as normal with a non return EasyBleed or valve and pumped with the pedal etc. If the pedal is firm and as high as usual then you should be fine.

 

[StuartDB]

Crazy thread revival from 2016...

But...

If you have a long pedal, you have cracked the 2 bleed nipples on the master cylinder.

 

[Dieseljuice]

Just to add:
With mk5 Golf I had changed the abs unit.....hence used Vagcom to bleed brakes.
With TT MK1 changed rear flexible pipe - tried bleeding without Vacom but brake pedal always spongy - used Vagcom to change all fluid and all good.

Sold Mk5 golf now have MK6. Just done my MK6 Golf without Vagcom as I was just changing the fluid and all worked fine.