Hi all just a quick question.

Replaced rear n/s brake caliper when a bled the brake with me pressure bleeder a put a pint of fluid through it and the air bubbles just wouldn't stop a mean there was loads.

Just wondering how much would anyone recommend or now's how much should it take to remove all air bubbles from 1 caliper.

To get all the air out of this 1 caliper a think a would need shares in the brake fluid company because it will take some fluid to completely remove all air.

Any suggestions thanks.

Graeme 

Edited 11 June, 20188 yr by Taximan1978

I replaced two rear calipers last year and it took no more than 1 litre to bleed the brakes with plenty to spare. 

Have you tried giving the brake pedal some gentle presses at the same time as using the pressure bleeder?

Also a little tap with a rubber mallet on the caliper sometimes helps with getting all the bubbles out.

No not yet a need more brake fluid when a get some al give it a go thanks.

A hope that a didn't have the bleed nipple open to much.

What sort of pressure bleeder were you using?

Sealey pump 1 pressurised it to 10 psi 

Just gravity bleed, takes longer but it's much safer. 

5 hours ago, Black vRS Oct said:

Just gravity bleed, takes longer but it's much safer. 

 

Not necessarily - pumping the brake pedal can ruin the master cylinder seals. Usually pressure bleeding is much better.

 

Also - Taximan - did you let the braking circuit completely empty when you took the caliper off? If so then air might be in the ABS Unit. This will need bleeding with VCDS as it is hard to get the air out of the pumps.

Thanks for the replys

No a didn't lose all fluid a clamped the flexy hose before removal.

Cheers 

With gravity bleed, you don't pump the pedal. It's literally a case of cracking the nipple open and letting gravity do the rest. Just keep it topped up

On 13/06/2018 at 18:49, Black vRS Oct said:

With gravity bleed, you don't pump the pedal. It's literally a case of cracking the nipple open and letting gravity do the rest. Just keep it topped up

 

I've never seen this and doubt very much it would work.

 

I suggest taximan close the nipple,press the brake pedal gently to build some pressure and keep it there for two or three minutes, allowing the air bubbles to float to the top of the caliper and the bubbles to consolidate. Then crack the nipple open, hopefully the air comes out together instead of bubbles dispersed throughout the fluid.

 

Pagid brake fluid is cheap at ECP/Carparts4less.

Cheers for the reply 

!0psi won't bled the air out, take the pressure bleeder up to about 15-20psi, make sure to get a good seal on the master cylinder as sometimes a bad seal can suck air back into the master cylinder.

A did that once before blew the master cylinder seales thats why a stoped at 10 psi.

A have ordered  more brake fluid from carparts4 less just waiting for it to arrive then bleed the brakes in sequence.

But cheers anyway.

Of course it works, stick a tube on the nipple and see how much fluid comes out (just using gravity) because the MC is the highest point of the system. If you have the car lifted off the ground at all four corners you can crack them all open and go for a brew. I guesstimate it would take around 30 minutes for 1 litre with none of the stress of flipping seals or blowing brake fluid over the engine

Edited 20 June, 20187 yr by Black vRS Oct

It does bleed no problem just lots of air bubbles.

A was wondering how much fluid should it normally take to remove all air from that 1 brake caliper rear passenger caliper is the 1 a have replaced.

The air bubbles seems to be never ending.

Cheers 

You start with the furthest away, rns, ros, fns, fos. Are you sure the air isn't getting in at the brake hose to caliper connection?

Edited 20 June, 20187 yr by Black vRS Oct

Full procedure is here: https://workshop-manuals.com/skoda/octavia-mk2/brake_systems/brakes_hydraulics_regulator_servo/bleeding_brake_system/bleeding_the_brake_system_of_air_with_the_brake_filling_and_bleeding_device/

 

Notice it suggests 2bar (~29 psi) for the pressure bleeder so if you're only using 10 psi it'll probably take much longer.

 

I think I pulled about 250ml per caliper when I replaced the ABS pump on mine, rears took slightly longer to clear

 

If you're still having problems, I'm sure a garage will finish the job for not much money if you provide some fluid.

Just waiting for more fluid to turn up to give it a another good bleed to try and remove more or all air from rear brakes just wait and see what happens.

Some clarification please.

Haynes says

a) left hand front brake

Right hand front brake 

c) Left hand rear brake 

d) Right hand rear brake 

 

The skoda workshops procedure is. 

1) Rear right 

2) Rear left

3) Front right 

4) Front left 

Which one is it a should use.

Anyone thanks.

Edited 23 June, 20187 yr by Taximan1978
Spelling mistake

Take no notice of that stupid emoji cant seem to get rid of it.

I'd follow the Skoda workshop manual, they did design the braking system  

Cheers 

Sorry to resurrect an old thread, but was wondering how people loosen and tighten the rear calipers nipples, as on my Scout, there is very little room to loosen and tighten it. Socket worked a treat, but you cant do that with the hose attached. Using a vacuum bleeder if that is any help.

If I remember correctly, I had my car on axle stands with all four wheels off and I don't recall any clearance issues using a spanner.

 

Obviously the Scout will have a slightly different rear end due to the 4x4 system but I wouldn't expect it to cause any issues.

10 hours ago, Gives-you-wings said:

Sorry to resurrect an old thread, but was wondering how people loosen and tighten the rear calipers nipples, as on my Scout, there is very little room to loosen and tighten it. Socket worked a treat, but you cant do that with the hose attached. Using a vacuum bleeder if that is any help.

 

Yeah, it's a right PITA!!! Mines not a 4x4 just a 2.0TDi but there is very little room. You either need a very cranked spanner (which I don't have) or a lot of Patience (I have even less of this) and turn the nipple a fraction at a time. I used a ring spanner and a lot of cursing.