Over half gallon of brake fluid flushed and brakes bled..The pedal isnt as rock solid
04-16-2007, 09:24 AM
#1
AudiWorld Super User
Thread Starter
Over half gallon of brake fluid flushed and brakes bled..The pedal isnt as rock solid
as I expected.
Now I havnt had brakes bled in my cars for a while, my bikes get the service every year so may be I am expecting the same rock solid feel. But, even when brakes are cold the pedal has decent bite but as I press harder to brake harder, I am able to press the pedal more and more. I expected it to have a "stop" point and then braking power to be related to pedal pressure.
We used a suction cup for bleeding the brakes, did not use the "press the pedal" methode.
Here is a sample of the dirty fluid:
<img src="http://www.pbase.com/kam1996/image/77273256.jpg">
Now I havnt had brakes bled in my cars for a while, my bikes get the service every year so may be I am expecting the same rock solid feel. But, even when brakes are cold the pedal has decent bite but as I press harder to brake harder, I am able to press the pedal more and more. I expected it to have a "stop" point and then braking power to be related to pedal pressure.
We used a suction cup for bleeding the brakes, did not use the "press the pedal" methode.
Here is a sample of the dirty fluid:
<img src="http://www.pbase.com/kam1996/image/77273256.jpg">
04-16-2007, 09:38 AM
#2
AudiWorld Super User
"Haven't bled for awhile" the understatment of the day! Maybe 4 or 5 years, or since you've had...
the car? Because of neglect, you now need to overhaul the calipers and MC, rebleed the system. Should be bled once a year, just like your bikes. Audi says 2 yrs. absolute max.
04-16-2007, 09:53 AM
#4
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Disagree
Audi recommend 2 years, for sure. And after 4 years its certainly overdue. However, damage to calipers and master cylinder? Possible but unlikely. Your spongy feel is probably now due to the relatively new pads. They'll take a couple of hundred miles of gentle bedding in before the feel is back to optimum.
Is this the same Bernie who told me its crazy to change the P/S fluid after 6 years?
Is this the same Bernie who told me its crazy to change the P/S fluid after 6 years?
04-16-2007, 09:59 AM
#5
AudiWorld Super User
That's correct! The calipers will be all sludged up inside, maybe MC also causing bypass...
No new parts needed unless you have a torn boot. Blow the piston out of the front caliper with air, catching it with a stick across the caliper ears. Rear caliper pistons unscrew from the E-brake actuators. Clean all internal parts, seals and boots in IPA (rubbing alcohol). Clean and relube caliper guide pins. The piston of a good caliper can be pushed into its bore with finger pressure, the test for your current condition.
04-16-2007, 10:02 AM
#6
AudiWorld Super User
Thread Starter
lol..ok...well the pads are surely brand new, so are the rotors..waiting to do a bed in..may be
tonight when I go to work. I can take an hour break and go bed the brakes in at 2:00 in the morning when there is no traffic anywhere..
