Did a brake fluid change today on my octy 1 tdi, bled all 4 corners thoroughly, and rebled, and bled again, could not get the system to brake properly for hours of careful bleeding. Used a whole litre of ATE super blue trying to sort it.

The upshot was a tiny pocket of air had gotten into the master cylinder, and, as ive never seen before 2 bleed nipples on the cylinder directly under the reservoir and out of sight, bled these and bingo.

For anyone else doing this job, dont forget these 2. Brakes and clutch are stonking now.

I nerver understood how can possibly get air into the sistem when only changing the fluid.

You just have to push out the old fluid with the new one.

I'm waiting for the weather to get colder (now are 34-36 deg) and change the brake fluid myself.

I'll use the classic one person method.Can't wait to see If I'm f***** up the brakes

it was my fault not watching the levels and let it get too low in the reservoir, however i thought a fill and a continued bleed would work its way through. But it held on to that air no doubt why they fitted the hidden nipples.

thanks for the heads up as this is something i need as my clutch is shocking

hopefully its a fluid issue, and not clutch. Ate Super blue, has made my pedal alot lighter, and the brakes are much more firm and progressive, rather than the previous spongyness

i have uprated pads and discs and my brakes arent good and my clutch is heavy. think a change is definitely needed. thanks

Advantage of super blue is,,,,,, its blue so you know when the fresh stuff is through, i estimate 500-700mls would do all inc clutch, i used a litre because of my mishap, and because there was still some crappy bits coming out of the bleed nipples.

to avoid getting low on the reservoir,do one caliper and then refill,another caliper and refill....dosn't matter you have to refill a few cc.

is impossible to get air in

Did a brake fluid change today on my octy 1 tdi, bled all 4 corners thoroughly, and rebled, and bled again, could not get the system to brake properly for hours of careful bleeding. Used a whole litre of ATE super blue trying to sort it.

The upshot was a tiny pocket of air had gotten into the master cylinder, and, as ive never seen before 2 bleed nipples on the cylinder directly under the reservoir and out of sight, bled these and bingo.

For anyone else doing this job, dont forget these 2. Brakes and clutch are stonking now.

This post it perfect timing.

I just replaced rear brakes. Had nightmare with letting rear pads get too worn and ended up having to remove calipers and strip them down. After a full rebuild and new rear bango/ pipies re bleed rear brakes. Went for test drive and very low pedal travel. Looking at this thread I bled the two nipples on servo. Lots of air in that. Must of let fluid get too low although tried to keep track of level and hey presto perfect brakes again

glad it helped, i thought i was looking after levels but it seems prone, or the 2 nipples wouldnt be there. took me ages to realise and find em. all my previous cars never had them

to avoid getting low on the reservoir,do one caliper and then refill,another caliper and refill....dosn't matter you have to refill a few cc.

is impossible to get air in

It may seem hard to you to get air in the system, however if it was,,, 2 people in as many days wouldnt have had the same issue, and VAG wouldnt have put 2 bleed nipples on the cylinder. It says 'potential' as this is potentially a problem.

And it helped someone, as was the purpose of the thread so already worth posting

It may seem hard to you to get air in the system, however if it was,,, 2 people in as many days wouldnt have had the same issue, and VAG wouldnt have put 2 bleed nipples on the cylinder. It says 'potential' as this is potentially a problem.

And it helped someone, as was the purpose of the thread so already worth posting

+1 there buddy.....

helped me heeps as would still be baffled now and I am not too shy of working on my car(as folks know)

It is true that it is hard to get air in system if no brake parts are removed or just a simple re bleed takes place and you are careful not letting fluids get too low but not impossible if you remove brake parts and introduce air in the systems.

Anyway point made post was helpful end of...

Cheers

No problem mate, the other scenario was a friend of mine whos rear wheel cylinder popped a piston, in an attempt to stop lost alot of fluid, then as car sat, the rest made its way out gravitationally. Her system was a self blessed so no bother, however had it happened to me I would have needed the info. It was just my stupidity thaon this occasiont ran it dry,