Quote:
Originally Posted by Z K
With ABS brakes, I would always open the bleeder when pushing the brake piston in. This makes sure you aren't forcing old and dirty brake fluid back through the ABS system valves and back to the master cylinder. I have noticed that the brake pedal will be mushy and low brake pedal engagement when I don't open the bleeder when pushing the piston in. Since then I have always opened the bleeder.
Google and you'll find a lot of articles regarding ABS system damage from pushing the piston in without opening the bleeder.
Here's one:
http://autorepair.about.com/library/a/1i/bl836i.htm
Another:
http://www.brakeandfrontend.com/Arti...irst_time.aspx |
Thanks, Z, I will keep that in mind.
I'm not sure how that would lead to a soft pedal though, unless you are doing some permanent physical damage to the master cylinder. Most everybody I've talked to on this subject either uses a piston retraction tool , a large C-clamp, or slow manual traction (muscle). No one has mentioned opening the bleed valve. There seems potential to suck back air into the lines unless you've pressurized the system.