So I was complaining that my brake job is costing me $600 in parts to this old f*** at work, you know, old enough to have been present for Jesus's christening......

And he insisted when I push the piston back into the calliper, that I have to 1) pinch the brake line and 2) open the bleeder, to make sure no fluid is forced backwards through the ABS system, because it will destroy it.

Is back-flowing brake fluid a hazard to any part of the brake system?

Now, there's no way in h*ll I'm going to pinch the brake line to stop the flow. If there is a hazard, I will remove the brake line, re-set the piston, attach, and bleed.

 

If you push brake fluid backward in the system your flux capacitor will detonate!






k, j/k.
I have never heard of such a thing.
As part of regular maintenance, as long as you have everything torn apart, I would flush my old brake fluid.

 

Oh there will be some serious flushage going on, thats fo shizzle! ha

Im still probably going to be removing the callipers for painting anyways, I just dont know if I should be super-duper carefull not to force any fluid back into the system in the process....

 

I've heard of this before and it wouldn't hurt to open the bleeder screw to let fluid escape while your pushing the caliper piston back in. Personally I've changed brake pads many times for the track and street on my G and have had no problems with pushing the pistons back in without opening the bleeder. The service manual makes no mention of opening the bleeder valve so I figured it's not necessary.

 

Do you have a service manual handy?

Any unusual or different methods specified for priming a dry calliper?

And what is the bleeding pattern?