soft brakes - why? - Page 2

Mark Lewis · 05-09-2010, 05:36 PM

I had a similar problem and bled all bleeder screws on the calipers and that solved the problem.

Hans Olsson · 05-10-2010, 10:49 AM

Quote:

Originally Posted by jim b

ok i believe that could be your problem.... In a fixed/opposing piston caliper configuration with 4 bleeders you usually need to bleed both uppers in each caliper half. (not just one)

x2.

Eddies66 · 05-10-2010, 12:28 PM

A second alternative is the vacuum bleeding kit. This kit works in the opposite manner of the pressure bleeder, applying a vacuum to the brake system in order to draw brake fluid out of the car. The system works well, but can sometimes cause air bubbles to form in the lines. Particularly on cars with rear brake proportioning valves like the Porsche 914, the vacuum system can leave air trapped in these valves, giving a spongy pedal as a result. When using the vacuum bleeding system, the best approach is to bleed each corner of the car several times, in order assure that all the air is out of the system. Simply fill up your brake reservoir, attach the pump system, pump up some vacuum, and then open the bleed nipple. Brake fluid should be pulled out of the system when the vacuum is applied. If it’s not – you may have a problem with your brake lines.

05-09-2010, 05:36 PM	#1
Mark Lewis Member Join Date: Apr 2006 Posts: 352 Likes: 65 Liked 209 Times in 46 Posts	Re: soft brakes - why? I had a similar problem and bled all bleeder screws on the calipers and that solved the problem.

05-10-2010, 12:28 PM	#3
Eddies66 VIP Member Join Date: Feb 2010 Location: Rancho Mirage, CA Posts: 1,308 Likes: 300 Liked 881 Times in 452 Posts	Re: soft brakes - why? A second alternative is the vacuum bleeding kit. This kit works in the opposite manner of the pressure bleeder, applying a vacuum to the brake system in order to draw brake fluid out of the car. The system works well, but can sometimes cause air bubbles to form in the lines. Particularly on cars with rear brake proportioning valves like the Porsche 914, the vacuum system can leave air trapped in these valves, giving a spongy pedal as a result. When using the vacuum bleeding system, the best approach is to bleed each corner of the car several times, in order assure that all the air is out of the system. Simply fill up your brake reservoir, attach the pump system, pump up some vacuum, and then open the bleed nipple. Brake fluid should be pulled out of the system when the vacuum is applied. If it’s not – you may have a problem with your brake lines.