ABS brake bleeding procedure

[Hendog]

I've searched. There is very little information on the brake bleeding procedure for ABS sytems. In this particular instance it would apply to a 996. Surely someone has done it with authoritative knowledge. My nieces' finace has a 996 and we're considering doing the brakes. A guy doesn't want to start something without having the propper procedure surely in hand.

Here's what I've read "somewhere" long ago (I don't remember where): There is a bleeder screw at the master cylinder, which is where you start, then work your way from the closest to the farthest wheel. That is the reverse of what I do for conventional brakes, so I'm not confident this is correct. Surely someone knows (Bill Verburg?).

[curiousone940]

Hopefully the pros will give you the definitive answer on this one, but in all of the ABS equipped autos I have done a brake bleed on, I've always done it the same way I would do a non ABS auto (start at the wheel furthest away from the MC and work your way forward). I think this would apply UNLESS you have replaced a brake fluid component (i.e. master cylinder, caliper, hose, etc.) OR air has been introduced into the system by some other means.

[911st]

sub'd.

[Hendog]

bump

[Hendog]

All righty then! I'll answer my own question and hopefully others will benefit.

Here is an article that explains quite well what an ABS brake system does in order to hold back some of the fluid. You'll need to cycle the valves in an ABS system to release the brake fluid held back. StopTech : Balanced Brake Upgrades

To engage the ABS system you can either drive the car after bleeding once, then go back and bleed it again. Or, you can buy from our host this tool which will allow you to cycle the valves in the ABS system to have them release the fluid as you flush. Porsche 996 Tools - Page 2 Durametric Diagnostic Tool for Porsche.

As for bleeding procedure, it's the same as any other car.