Brake bleeding, brake fluid changes - IMPORTANT

[monte]

Hi Sean, Ive been meaning to ask you for a while now….I have noticed probably 2 times now that when I brake really sharp (i.e. foot to the floor) I have felt a grinding in the pedal. Could this be related to brake fluid issues?

Thanks,

Carlo.

[Teutonic_Tamer]

Hi Sean, Ive been meaning to ask you for a while now….I have noticed probably 2 times now that when I brake really sharp (i.e. foot to the floor) I have felt a grinding in the pedal. Could this be related to brake fluid issues?

Thanks,

Carlo.

Nothing to do with fluid - that is just your ABS kicking in. 

[monte]

Hi Sean, Ive been meaning to ask you for a while now….I have noticed probably 2 times now that when I brake really sharp (i.e. foot to the floor) I have felt a grinding in the pedal. Could this be related to brake fluid issues?

Thanks,

Carlo.

Nothing to do with fluid - that is just your ABS kicking in. 

Thanks Bud 

[camfollower]

Wow, I did this, this evening... lots of black stuff... holding the pedal back is fun, cheers

[camfollower]

Worth noting, that the ABS purge takes a huge chunk out of the battery power; today I had an Airbag warning malfunction, followed by no electrics... oh sh!t was my first reaction, then tried to start the car, nothing...... Battery, doh.  Quick charge and it was fine; took the long way home to get some juice into it.  

[jedi-knight83]

Hello. Found this from the search function. Some good advice.

Although I'm relatively handy with basic mechanical tasks (I've changed discs and pads and managed to fit coil overs all on my own before), I've NEVER bled brakes before. Should I stop here and get a garage to do this for me?

I've got VCDS, A caliper winder tool, new brake discs and pads for the rear, new braided lines all round and new discs, pads, calipers to fit to the front. I'll get brake fluid from TPS (how much is needed)

Can I have a bit more detail on the process of bleeding once you've plugged in VCDS?

Do you need to just put it into 1 mode and then bleed it once.. or does it need bleeding in all of the 4 modes that were previously mentioned?

Thanks in advance.

Nathan

[Johnsy]

Thread Revival!

Anybody in or around Newcastle upon Tyne who can do the VCDS abs trickery for me ?

[Flyingscotsman]

Just thought I'd draw attention to this helpful thread on the importance of using VCDS to cycle the ABS during brake bleeding, and of flushing with plenty of fluid.

Did my brakes at the weekend and after using VCDS got about 100ml of pretty black fluid out of the rear calipers. This is despite the fact that I paid a VW dealer for a "brake fluid service" only last year!

I used about 1.5 litres of fluid to flush all four calipers (~350ml from each).   

[Teutonic_Tamer]

Just thought I'd draw attention to this helpful thread on the importance of using VCDS to cycle the ABS during brake bleeding, and of flushing with plenty of fluid.

It is indeed a very helpful and important thread.  It really deserves to be a <cough>STICKY<cough> 

Did my brakes at the weekend and after using VCDS got about 100ml of pretty black fluid out of the rear calipers. This is despite the fact that I paid a VW dealer for a "brake fluid service" only last year!

If it was only 100ml of fluid from your rear calipers - and bearing in mind the extra length of pipework to the rears, I would strongly doubt that came from the ABS/ESP unit.  More likely to be the seals in your rear calipers wearing which was what tainted the fluid.

And 90% of VW stealers are utter scum regarding brake fluid changes.  My ex-SWMBO asked me to check over her recently purchased genuine DasAuto approved Mk6 TDI - and the brake fluid is BLACK in the master cylinder reservoir.  Car has had full main dealer service history, AND the DasAuto used car sales check (which is supposed to check brake fluid condition) - and the amount of boxes they ticked, but blatantly failed to do is truely shocking.  The bluetooth head unit and DIS still had the previous owners full phone book and handset still stored. 

I used about 1.5 litres of fluid to flush all four calipers (~350ml from each).

1.5 litres is a bit on the sparse side - especially if it has never been bled properly previously.

[IOMAL]

Forgive my ignorance,is this what your on about when you say  VCDS .....or is it another piece of kit that's lots more dosh


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[Shoduchi]

Forgive my ignorance,is this what your on about when you say  VCDS .....or is it another piece of kit that's lots more dosh

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Second option man.

https://www.gendan.co.uk/product_VCHU_9.html#product_information

[Newbieintown]

So sorry to be stupid, how much would brake fluid should I need to do all 4 corners plus clutch? Then am guessing all 4 corners again when flushing the abs? Would I need to redo the clutch for the 2nd time? Thanks.

[M4T VW]

Gave this a go on mine yesterday and failed. It's a completely empty system with new brakes front and rear. I put the pressure bleeeder on (10psi) and bled them manually and finished with the clutch. Then plugged in the laptop and used "basic settings" and followed the guide for a couple of times. Didn't really help and just seems to be  pouring brake fluid down the drain. (hypothetically)

Can anyone confirm if you are using the "basic settings" function or just using the "output tests" to kick the abs pump in while holding the brake?
Both my brake and clutch pedal go to the floor still.

[GTICZ]

i think, you will need to a second man to work with basic setting... with output tests it can be done by your self, but its ust my guess

[M4T VW]

That's what i did. I did have a 2nd man with me but the basic settings goes on forever and you end up using loads of fluid. I bet the dealers dont use that method!