3 of my 4 calipers get brake fluid, not the last one

[DeadEye]

Hi,

I have a Golf mk4 GTI 1.8t 2003.

Some hard brake lines were broken (rust) so I've replaced 3 of them.

I tried a full brake bleeding with my Power Bleeder, no problem with the front left/right and the rear right.....

BUT ABSOLUTELY NOTHING from the Rear Left !!

First I've checked the brake line disconnected from the caliper (maybe the caliper was faulty)
===> got 1 drop of fluid every 10-20 sec... )
Then I thought that the brake line was bad So I bought 2 new one (from VW and a brake specialist) :
=====> Same problem no fluid

So if anyone can explain what could be the problem ?
ABS pump, master cyl, the brake line ???

I have VCDS if needed

Thanks a lot

[Crasher]

The hose to the rear caliper which is crimped to the line, is that new?

[DeadEye]

Hi,

Thanks for the reply.

Everything is new x2

[Crasher]

Did you use any line clamps on the rear caliper hoses? Can you get more fluid to flow by pressing the brake pedal? Do you have a system like VCDS that allows you to do basic settings on the ABS pump?

[zollaf]

follow the pipe back to the abs pump and see if you can get fluid if you just un nip that connector. ?

[DeadEye]

No, I use only the same parts found on ETKA/ETSA and that's what I ordered and installed.

Yes I have VCDS

I'm going to swap the left rear with the left right brake line directly on the hydraulics unit

I suppose :
- fluid from left rear = hydraulics unics unit faulty
- fluid from rear right = I bought bad brake lines

Right ?

[DeadEye]

Ok I'll see thanks

[DeadEye]

follow the pipe back to the abs pump and see if you can get fluid if you just un nip that connector. ?

No fluid

If I disconnect those from the master cyl for ex yes there is

[Crasher]

I'm going to swap the left rear with the left right brake line directly on the hydraulics unit

They use different sized fittings, M10 and M12

[DeadEye]

I know I've changed them myself
M12 master cylinder
M10 pipes to calipers

It was just an example.