CONTEXT

I have hitherto being using a suction method using Clarke break clutch bleeding tool. Just bought a Sealey tool that connects to break master cylinder reservoir cap. It pressurises and 'pushes' fluid. 

I kept the pressures low. Max is 28psi. 

I did the rear breaks and the difference is noticeable. Been 2 yrs since fluid changed.

 

QUESTION

About to do front brake bleed next along with ABS pump. I read to bleed ABS pump using front brake caliper nipples whilst activating ABS pump using VCDS. Presumably due to proximity of ABS pump to front calipers?

 

How long do I need to activate the ABS pump for to exchange fluid? A few seconds?

When?  Nipple open presumably?

 

Some comments on ABS pump being able to push fluid through system without need for additional equipment? 

 

Never used VCDS for ABS so any help appreciated. Used the brake bleeding kit xx times for this car and others.

 

PS ABS unit is working fine just routine maintenance. 

Thanks

You don't need to bleed the ABS block unless it gulped air, just push the fresh juice through the system, once it runs clear from each caliper then it's job done.

Is it worth doing?

It was recommended on a reply to a post on Octavia 3 forum. One reply I got went  as far as stating that it would be a waste of time to bleed the brakes without doing ABS module. I have seen youtube videos suggesting it is worthwhile. 

 

Sure, most of the brake fluid is changed without doing it.

 

I am not sure how ABS unit works exactly, but my understanding it is a 'dead leg' until used. So, old fluid remains in it?

 

Thanks

9 minutes ago, bmbmdmb said:

Is it worth doing?

It was recommended on a reply to a post on Octavia 3 forum. One reply I got went  as far as stating that it would be a waste of time to bleed the brakes without doing ABS module. I have seen youtube videos suggesting it is worthwhile. 

 

Sure, most of the brake fluid is changed without doing it.

 

I am not sure how ABS unit works exactly, but my understanding it is a 'dead leg' until used. So, old fluid remains in it?

 

Thanks

 

A few millilitres of old fluid will remain undisturbed in the ABS block, in the big scheme of things it's a tiny and meaningless amount, only OCD types would worry about it since you're replacing 99% of that old fluid in the system.

11 hours ago, sepulchrave said:

A few millilitres of old fluid will remain undisturbed

I think I will not bother.

If it aint broken don't fix it...

Thanks