Hi all, I had posted a few weeks back about having difficulting getting my brakes properly bled on my 99 S70 T5 as well as my 98 S70 GLT. About a year ago I had gotten my 98's brakes working finally after bleeding it 3x in a row. I had not really figured out why it worked that last time, it just had.

Well, I bought my 99 about 2 months ago, and the brakes were desperate for replacement, and already had lots of air in the line. I did the brakes as per Volvo spec manual (TP something or other, forget the number), including all the standard hard ware (rotors, pads, shoes). I bled the brakes per the Volvo tech manual (the official TP manual states to do the front left first, then front right, then rear left, and finally rear right) using a pressure bleeder (the type you pump up, not one that was tire driven, and set at 30PSI, per the tech manual (well, it says anywhere between 30-45 PSI, but my bleeder maxd out at 30). After words, it felt right for a few days, drove it for a week, and finally ended up with air in the lines again.

Well, I bled the system 2 more times, same result...

Finally, I got it to work! Here is what I did, though I don't know if it's reproducable, so someone try it and let us know:

- Connected pressure bleeder
- Pressurized bleeder to ONLY 10 PSI
- Turned on car
- Lightly depressed pedal a few times with car running (this was done to make sure that the ABS system was not retaining any air)
- Turned car off
- Pressurized bleeder to 30 PSI per tech manual spec)
- Opened the bleeder valve on the front left, and while it bled, gently tapped caliper with a small hammer (trying to free up any small bubbles that might be clinging to the internal caliper chambers). Also gently tapped the rubber brake line with finger, to free up any bubbles. Closed valve.
- Repeated with front right
- No air was found at either front wheel.
- Repeated with rear left. LOTS of air (maybe 2-3 cc's), and what appeared to be dirty fluid (had a darkish color to it, about 2 cc's).
- Repeated with rear right. Again, a measurable amount of air, and just a bit of darkish fluid.

Slowly removed pressure to the system, made sure level was at the MAX mark on the brake resivoir, put wheels back on, gently lowered her down again, and drove for 1 week.

So far, so good! This is my best result yet on this 99. I will keep the board updated on if it keeps. NOTE: the idea for starting the car to get fluid moving through ABS system was the idea of Rick at import parts specialists, who said he did this on Mercedes with good results (apparently they have had similar problems on certain models?).

Anyways, good luck!